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University of Manchester
1.
Martin, Margarita.
Synthesis of heat integrated gas separation systems incorporating absorption.
Degree: PhD, 2009, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:228857 
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506225
► There is an economic incentive to substitute energy and capital-intensive conventional gas separation schemes based on cryogenic distillation. Absorption has potential advantages over low-temperature schemes…
(more)
▼ There is an economic incentive to substitute energy and capital-intensive conventional gas separation schemes based on cryogenic distillation. Absorption has potential advantages over low-temperature schemes as it does not rely on high refrigeration requirements to perform the separation. An optimisation-based synthesis framework has been developed that integrates distillation and absorption-desorption schemes. This methodology is able to quantitatively resolve the numerous tradeoffs between the various capital and operating factors and systematically suggest new design configurations. A multilevel modelling approach enables the accommodation of absorption-desorption separation options in the distillation orientated framework supported by COLOM® (©Centre for Process Integration, University of Manchester). Improved shortcut models for reboiled absorption and distillation columns have been proposed, which are suitable for exploitation in the developed synthesis framework. A new methodology for heat integration is proposed that achieves efficient heat recovery and proposes a configuration of the heat exchanger network. This methodology works in harmony with the optimisation framework. Simultaneous optimisation of the separation system, the heat exchanger network and the refrigeration system offers the opportunity of achieving a superior overall configuration. The structural and operating variables of the separation system are optimised by Simulated Annealing. As a stochastic optimisation method, SA can deal with the large scale of the problem and its discontinuous and non-linear nature imposed by the feasibility limits of the separations and the model equations. The optimal separation configurations are selected on the grounds of minimum capital and operating costs. An analysis of costing methods is provided which aims at rationalising the basis for cost estimation. The application of the developed synthesis methodology is illustrated by a number of examples of relevance to the natural gas processing and refinery gas processing. Results will emphasise the functionality of the methodology as a tool for quantitative evaluation of preliminary designs and realisation of highly integrated and efficient process concepts.
Subjects/Keywords: 660.2842; Gas Separation absorption
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APA (6th Edition):
Martin, M. (2009). Synthesis of heat integrated gas separation systems incorporating absorption. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:228857 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506225
Chicago Manual of Style (16th Edition):
Martin, Margarita. “Synthesis of heat integrated gas separation systems incorporating absorption.” 2009. Doctoral Dissertation, University of Manchester. Accessed August 18, 2019.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:228857 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506225.
MLA Handbook (7th Edition):
Martin, Margarita. “Synthesis of heat integrated gas separation systems incorporating absorption.” 2009. Web. 18 Aug 2019.
Vancouver:
Martin M. Synthesis of heat integrated gas separation systems incorporating absorption. [Internet] [Doctoral dissertation]. University of Manchester; 2009. [cited 2019 Aug 18].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:228857 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506225.
Council of Science Editors:
Martin M. Synthesis of heat integrated gas separation systems incorporating absorption. [Doctoral Dissertation]. University of Manchester; 2009. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:228857 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506225
University of Alberta
2.
Shafie, Amir Hossein.
Gas Separation Membranes Using Cementitious-Zeolite
Composite.
Degree: MS, Department of Chemical and Materials
Engineering, 2011, University of Alberta
URL: https://era.library.ualberta.ca/files/5q47rp173
► Natural zeolite-based membranes have recently shown promise in the separation of H2 from CO2 and hydrocarbons. However, these highly dense, naturally monolithic materials can suffer…
(more)
▼ Natural zeolite-based membranes have recently shown
promise in the separation of H2 from CO2 and hydrocarbons. However,
these highly dense, naturally monolithic materials can suffer
defects which disrupt the continuity of the zeolite micropores and
create leak paths through the membrane. Cement materials were
explored as a component to generate mixed-matrix zeolite membranes.
The ability for cement to intergrow between the zeolite particles
promised to, under proper conditions, provide a smooth non-boundary
interface with the zeolite particles and eliminate interparticle
voids. The influence of zeolite contents in the composite
membranes, operating pressures and temperatures on the performance
of the membranes were examined. Gas permeation results show a
hydrogen permeance of 4.1 × 10-8 mol.m-2.s-1.Pa-1 a CO2 permeance
of 1.6 × 10-9 mol.m-2.s-1.Pa-1 and a H2/CO2 single gas selectivity
of 25 were obtained at 25 °C and 1 atm. The gas permeance through
the clinoptilolite cement composite membrane was dependent on
operating temperature, indicating that the permeation through the
membrane was an activated diffusion process and that the permeation
through the zeolite embedded in the composite membrane was
predominant. However, the increase of gas permeation and the
corresponding decrease of H2/CO2 selectivity with increasing total
pressure are an indication of some defects in the composite
membranes. Further research to optimize the membrane preparation
conditions and to modify the membrane surface to improve hydrogen
permeation and H2/CO2 selectivity is needed.
Subjects/Keywords: gas separation; natural zeolite; membrane
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APA (6th Edition):
Shafie, A. H. (2011). Gas Separation Membranes Using Cementitious-Zeolite
Composite. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/5q47rp173
Chicago Manual of Style (16th Edition):
Shafie, Amir Hossein. “Gas Separation Membranes Using Cementitious-Zeolite
Composite.” 2011. Masters Thesis, University of Alberta. Accessed August 18, 2019.
https://era.library.ualberta.ca/files/5q47rp173.
MLA Handbook (7th Edition):
Shafie, Amir Hossein. “Gas Separation Membranes Using Cementitious-Zeolite
Composite.” 2011. Web. 18 Aug 2019.
Vancouver:
Shafie AH. Gas Separation Membranes Using Cementitious-Zeolite
Composite. [Internet] [Masters thesis]. University of Alberta; 2011. [cited 2019 Aug 18].
Available from: https://era.library.ualberta.ca/files/5q47rp173.
Council of Science Editors:
Shafie AH. Gas Separation Membranes Using Cementitious-Zeolite
Composite. [Masters Thesis]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/5q47rp173
King Abdullah University of Science and Technology
3.
Samin, Umer.
An Investigation into the Effect of Cation-exchange on the Adsorption Performance of Indium-based Sodalite-ZMOF.
Degree: 2016, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/607269
► There is a pressing need for advanced solid-state materials that can be implemented in industrial gas separation processes to achieve separations with a significantly reduced…
(more)
▼ There is a pressing need for advanced solid-state materials that can be implemented in industrial gas separation processes to achieve separations with a significantly reduced energy input compared to what is typically required from current technologies.
Although certain porous materials like zeolites bear some commercial significance for gas separation; their inherent lack of tunability limits the extent to which these materials may be exploited in industry. Zeolite-like Metal-Organic Frameworks (ZMOFs) are a sub-class of Metal-Organic Framework materials (MOFs) that show a structural semblance to zeolites while possessing the tunability advantages of MOF materials. ZMOFs which are topologically similar to certain zeolites can be functionalised and tuned in numerous ways to improve their gas separation properties.
In this work, indium-based sod-ZMOF was tuned by cation-exchange and then characterised by different experimental tools such as single-crystal x-ray diffraction, elemental analysis and gas adsorption. It was found that various parameters like the choice of cation, the concentration of salt solution and the choice of solvent had a significant bearing on the cation-exchange of sod-ZMOF and its subsequent adsorption properties.
Subjects/Keywords: ZMOFs; MOFs; Zeolites; Gas Separation
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APA (6th Edition):
Samin, U. (2016). An Investigation into the Effect of Cation-exchange on the Adsorption Performance of Indium-based Sodalite-ZMOF. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/607269
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Samin, Umer. “An Investigation into the Effect of Cation-exchange on the Adsorption Performance of Indium-based Sodalite-ZMOF.” 2016. Thesis, King Abdullah University of Science and Technology. Accessed August 18, 2019.
http://hdl.handle.net/10754/607269.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Samin, Umer. “An Investigation into the Effect of Cation-exchange on the Adsorption Performance of Indium-based Sodalite-ZMOF.” 2016. Web. 18 Aug 2019.
Vancouver:
Samin U. An Investigation into the Effect of Cation-exchange on the Adsorption Performance of Indium-based Sodalite-ZMOF. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2016. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/10754/607269.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Samin U. An Investigation into the Effect of Cation-exchange on the Adsorption Performance of Indium-based Sodalite-ZMOF. [Thesis]. King Abdullah University of Science and Technology; 2016. Available from: http://hdl.handle.net/10754/607269
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
King Abdullah University of Science and Technology
4.
Irerua, Olayinka.
Multicomponent Matrimid Membrane for Gas Separation.
Degree: 2012, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/235352
► Matrimid was utilized for the preparation of membranes with asymmetric structures. A combination of well-known solvents for Matrimid which include 1- methyl-2-Pyrrolidone (NMP), tetrahydrofuran (THF),…
(more)
▼ Matrimid was utilized for the preparation of membranes with asymmetric
structures. A combination of well-known solvents for Matrimid which include 1-
methyl-2-Pyrrolidone (NMP), tetrahydrofuran (THF), dichloromethane,
tetrachloroethane as well as non-solvents n-butanol, xylene, and acetic acid were
used. Cast solutions were prepared at room temperature for different
combinations and compositions of polymer/solvent/non-solvent systems. PEG
and Octa-(amino phenyl) POSS were introduced in some of the cast solutions.
The membranes obtained were characterized by permeation test for gas
permeabilities and selectivities, Scanning Electron Microscopy (SEM) and
Nuclear Magnetic Resonance (NMR) Spectroscopy. The gas permeation test
showed that the use of mixture of dichloromethane and tetrachloroethane as
solvents with xylene non-solvent and acetic acid as stabilizer gave membranes
with very high gas selectivity of 133 for CO2/N2 and 492 for CO2/CH4. Also, cast
solutions containing PEG resulted in membranes with slightly enhanced
selectivities from 30 to 42 for CO2/N2. Permeation results for CO2, N2 and H2 and
the selectivities for gas pairs such as CO2/N2, CO2/CH4, are discussed in relation
to the effect of pressure on the membrane permeance, they are also compared
with existing results.
Subjects/Keywords: Matrimid; membranes; Gas Separation; Multicomponent
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APA (6th Edition):
Irerua, O. (2012). Multicomponent Matrimid Membrane for Gas Separation. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/235352
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Irerua, Olayinka. “Multicomponent Matrimid Membrane for Gas Separation.” 2012. Thesis, King Abdullah University of Science and Technology. Accessed August 18, 2019.
http://hdl.handle.net/10754/235352.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Irerua, Olayinka. “Multicomponent Matrimid Membrane for Gas Separation.” 2012. Web. 18 Aug 2019.
Vancouver:
Irerua O. Multicomponent Matrimid Membrane for Gas Separation. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2012. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/10754/235352.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Irerua O. Multicomponent Matrimid Membrane for Gas Separation. [Thesis]. King Abdullah University of Science and Technology; 2012. Available from: http://hdl.handle.net/10754/235352
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
5.
De Lange, M.F.
Fricdiff: Parameter estimation and feasibility assessment of combination of Fricdiff and reaction:.
Degree: 2010, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:54fcb117-5167-4738-afbc-f0ede476aafe
► Fricdiff, which either stands for frictional diffusion or frictional difference is a separation technology for the separation of gas and vapour mixtures. It is based…
(more)
▼ Fricdiff, which either stands for frictional diffusion or frictional difference is a
separation technology for the
separation of
gas and vapour mixtures. It is based on the difference of diffusional velocities of the components to be separated in an additional component, called sweep
gas, through a porous barrier. This work has two objectives. The first objective is to estimate the average pore diameter and porosity-tortuosity factor, two parameters important for the transport through the porous barrier. The second objective of this thesis is a feasibility assessment of the combination of Fricdiff with an equilibrium limited chemical reaction. The reaction used to assess this feasibility is the water-
gas shift reaction
Advisors/Committee Members: Bardow, A., Selvi, A..
Subjects/Keywords: Fricdif; separation; water-gas shift
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APA (6th Edition):
De Lange, M. F. (2010). Fricdiff: Parameter estimation and feasibility assessment of combination of Fricdiff and reaction:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:54fcb117-5167-4738-afbc-f0ede476aafe
Chicago Manual of Style (16th Edition):
De Lange, M F. “Fricdiff: Parameter estimation and feasibility assessment of combination of Fricdiff and reaction:.” 2010. Masters Thesis, Delft University of Technology. Accessed August 18, 2019.
http://resolver.tudelft.nl/uuid:54fcb117-5167-4738-afbc-f0ede476aafe.
MLA Handbook (7th Edition):
De Lange, M F. “Fricdiff: Parameter estimation and feasibility assessment of combination of Fricdiff and reaction:.” 2010. Web. 18 Aug 2019.
Vancouver:
De Lange MF. Fricdiff: Parameter estimation and feasibility assessment of combination of Fricdiff and reaction:. [Internet] [Masters thesis]. Delft University of Technology; 2010. [cited 2019 Aug 18].
Available from: http://resolver.tudelft.nl/uuid:54fcb117-5167-4738-afbc-f0ede476aafe.
Council of Science Editors:
De Lange MF. Fricdiff: Parameter estimation and feasibility assessment of combination of Fricdiff and reaction:. [Masters Thesis]. Delft University of Technology; 2010. Available from: http://resolver.tudelft.nl/uuid:54fcb117-5167-4738-afbc-f0ede476aafe
University of Edinburgh
6.
Lee, Michael James.
Novel microporous polymers for use as gas separation membranes.
Degree: PhD, 2016, University of Edinburgh
URL: http://hdl.handle.net/1842/25786
► Polymers of Intrinsic Microporosity (PIMs) combine the desirable processability of polymers with a significant degree of microporosity generated from the inefficient packing of their rigid…
(more)
▼ Polymers of Intrinsic Microporosity (PIMs) combine the desirable processability of polymers with a significant degree of microporosity generated from the inefficient packing of their rigid and contorted structures. They are attracting attention for a variety of applications including as membrane materials for gas separations. Over the last 30 years, membranes have become an established technology for separating gases and are likely to play key role in reducing the environmental impact and costs of many industrial processes such as O2 or N2 enrichment from air, natural gas upgrading and hydrogen recovery from ammonia production. This thesis describes the synthesis of a series of novel PIMs, primarily PIM-polyimide structures (PIM-PI) and investigates their potential in such applications. In particular, it focuses on the design and synthesis of solution processable PIMs in order to study how structural differences affect the gas permeability. The first section describes the synthesis of a variety of PIM-PIs using large bulky diamines derived from spirobisindane (SBI) and biphenylfluorene (BPF) structures which are useful monomers for achieving high BET (Brunauer-Emmett- Teller) surface areas (> 650 m2 g-1). The second section describes a whole series PIs based on novel and literature based Tröger’s base (TB) diamine monomers. Most of these exhibited good solubility, excellent thermal stability and intrinsic microporosity, with apparent BET surface areas in the range 450-739 m2 g-1. Notably, a polyimide derived from Me2TB and pyromellitic anhydride demonstrates gas permeability data above the 2008 upper bounds for important gas pairs such as O2/N2, H2/N2 and H2/CH4. The third section aims to enforce rigidity within the polymers further by incorporating differently substituted monomers based on rigid ethanoanthracene (EA) units. This includes the formation of a novel EA-EA based PI with an exceptionally rigid polymeric structure, possessing a BET surface area of 694 m2 g-1. In addition to very high permeability, this polymer demonstrates improved gas selectivity due to its enhanced performance as a molecular sieve, placing it amongst some of the highest performing polymers to date. The final section looks at other ways in which rigidity can be enforced including the formation of TB-polymers and thermally rearranged (TR) polymers and assesses their potential for future investigations.
Subjects/Keywords: microporous; polymer; gas separation; membrane
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APA (6th Edition):
Lee, M. J. (2016). Novel microporous polymers for use as gas separation membranes. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/25786
Chicago Manual of Style (16th Edition):
Lee, Michael James. “Novel microporous polymers for use as gas separation membranes.” 2016. Doctoral Dissertation, University of Edinburgh. Accessed August 18, 2019.
http://hdl.handle.net/1842/25786.
MLA Handbook (7th Edition):
Lee, Michael James. “Novel microporous polymers for use as gas separation membranes.” 2016. Web. 18 Aug 2019.
Vancouver:
Lee MJ. Novel microporous polymers for use as gas separation membranes. [Internet] [Doctoral dissertation]. University of Edinburgh; 2016. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/1842/25786.
Council of Science Editors:
Lee MJ. Novel microporous polymers for use as gas separation membranes. [Doctoral Dissertation]. University of Edinburgh; 2016. Available from: http://hdl.handle.net/1842/25786
University of Texas – Austin
7.
-2634-4309.
Characterization of gas separation properties of novel polymer membranes.
Degree: Chemical Engineering, 2015, University of Texas – Austin
URL: http://hdl.handle.net/2152/32936
► Polymers with high permeability (throughput), selectivity (separation efficiency), and long term stability are desired for gas separation applications. This dissertation investigates gas transport properties of…
(more)
▼ Polymers with high permeability (throughput), selectivity (
separation efficiency), and long term stability are desired for
gas separation applications. This dissertation investigates
gas transport properties of two relatively novel polymer membranes: thermally rearranged (TR) polymers and UV-crosslinked poly(arylene ether ketone)s (PAEKs). TR polymers belong to a relatively recent class of materials that, due in part to high free volume and a favorable free volume distribution, have interesting
gas separation performance. This work examines the structure-property relationship of several TR isomers, explores the
gas transport and mechanical properties of a series of TR copolymers, and investigates the influence of toluene, a model aromatic contaminant in natural
gas on pure- and mixed-
gas permeation properties of TR polymers. In addition to TR polymers, this thesis also presents the influence of UV irradiation and physical aging on O2 and N2 permeation properties of ultra-thin (~150 nm thick) PAEK films.
Gas permeability decreased and selectivity increased with UV irradiation and aging time. Samples irradiated in air have lower permeability coefficients and higher selectivities than samples irradiated in N2. Additionally, physical aging behavior was also influenced by the aging environment and the irradiation wavelength.
Advisors/Committee Members: Freeman, B. D. (Benny D.) (advisor), Paul, Donald R. (advisor), Sanchez, Isaac C (committee member), Ellison, Christopher J (committee member), Riffle, Judy S (committee member).
Subjects/Keywords: Gas separation; Glassy polymer
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APA (6th Edition):
-2634-4309. (2015). Characterization of gas separation properties of novel polymer membranes. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/32936
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
-2634-4309. “Characterization of gas separation properties of novel polymer membranes.” 2015. Thesis, University of Texas – Austin. Accessed August 18, 2019.
http://hdl.handle.net/2152/32936.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
-2634-4309. “Characterization of gas separation properties of novel polymer membranes.” 2015. Web. 18 Aug 2019.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-2634-4309. Characterization of gas separation properties of novel polymer membranes. [Internet] [Thesis]. University of Texas – Austin; 2015. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/2152/32936.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
-2634-4309. Characterization of gas separation properties of novel polymer membranes. [Thesis]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/32936
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
University of Notre Dame
8.
Ashish Kushwaha.
Development of Polybenzoxazole (PBO)-Based Polymer Membranes
for Gas Separation</h1>.
Degree: PhD, Chemical and Biomolecular Engineering, 2017, University of Notre Dame
URL: https://curate.nd.edu/show/cj82k645m42
► Polybenzoxazoles (PBOs) are highly attractive membrane materials because of their superior gas separation parameters (high permeability and high selectivity) and excellent mechanical and thermal…
(more)
▼ Polybenzoxazoles (PBOs)
are highly attractive membrane materials because of their superior
gas separation parameters (high permeability and high selectivity)
and excellent mechanical and thermal stability. However, the
practical application of PBO-based membranes is frequently
frustrated by their poor processability due to insolubility
problem. Current PBO synthesis approach addresses the insolubility
issue by solid-state thermal rearrangement (TR) of aromatic
polyimides (APIs) with ortho-positioned hydroxyl
group, wherein the soluble API precursors are solution cast into
membranes before being thermally converted to TR
membranes. However, the API-TR process poses some
major challenges, complicating the implementation of TR membranes
for practical industrial applications. First of all, the
temperatures required for the TR conversion are very high (>
400 °C), which severely limits the choice of porous supporting
polymers used in common membrane modules such as hollow fibers.
Moreover, the high thermal conversion temperature causes collateral
thermal degradation in the TR polymers, causing brittleness and
defects in the resulting membranes. In addition, the thermal
conversion process requires strict inert media
(N
2 or vacuum) for the imide-to-benzoxazole
conversion to occur, which makes the API-TR process of PBO
membranes production highly cost-intensive and
complex. This work explores the feasibility of
alternative routes to produce high performance PBO-based membranes
as well as investigate new synthesis approach of PBOs with much
improved processability to overcome the abovementioned challenges
in the API-TR route. Specifically, four approaches to form
PBO-based membranes have been investigated in this work:
Developing an alternate process to produce PBO
membranes via thermal cyclodehydration (CD) of polyhydroxyamide
(PHA) precursors: Investigating the interplay
between the TR and CD processes in a series of blends of API and
PHA in varying ratios: Developing a novel
one-pot, solution cyclization synthesis route to produce
organo-soluble PBOs (S-PBOs) via a silylation assisted process of
in situ amide-to-benzoxazole
conversion: Synthesizing PBO-based copolymers
via a combination of in situ solution
cyclization and solid-state TR conversion to maximize
separation
performance:
Advisors/Committee Members: Dr. Hsueh-Chia Chang, Committee Member, Dr. Paul Bohn, Committee Member, Dr. William Phillip, Committee Member, Dr. Ruilan Guo, Research Director.
Subjects/Keywords: polymers; polybenzoxazole; gas separation; cyclodehydration
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APA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kushwaha, A. (2017). Development of Polybenzoxazole (PBO)-Based Polymer Membranes
for Gas Separation</h1>. (Doctoral Dissertation). University of Notre Dame. Retrieved from https://curate.nd.edu/show/cj82k645m42
Chicago Manual of Style (16th Edition):
Kushwaha, Ashish. “Development of Polybenzoxazole (PBO)-Based Polymer Membranes
for Gas Separation</h1>.” 2017. Doctoral Dissertation, University of Notre Dame. Accessed August 18, 2019.
https://curate.nd.edu/show/cj82k645m42.
MLA Handbook (7th Edition):
Kushwaha, Ashish. “Development of Polybenzoxazole (PBO)-Based Polymer Membranes
for Gas Separation</h1>.” 2017. Web. 18 Aug 2019.
Vancouver:
Kushwaha A. Development of Polybenzoxazole (PBO)-Based Polymer Membranes
for Gas Separation</h1>. [Internet] [Doctoral dissertation]. University of Notre Dame; 2017. [cited 2019 Aug 18].
Available from: https://curate.nd.edu/show/cj82k645m42.
Council of Science Editors:
Kushwaha A. Development of Polybenzoxazole (PBO)-Based Polymer Membranes
for Gas Separation</h1>. [Doctoral Dissertation]. University of Notre Dame; 2017. Available from: https://curate.nd.edu/show/cj82k645m42
King Abdullah University of Science and Technology
9.
Alaslai, Nasser Y.
Gas Sorption, Diffusion and Permeation in a Polymer of Intrinsic Microporosity (PIM-7).
Degree: 2013, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/293348
► The entire world including Saudi Arabia is dependent on natural gas to provide new energy supplies for the future. Conventional ways for gas separation are…
(more)
▼ The entire world including Saudi Arabia is dependent on natural gas to provide new energy supplies for the future. Conventional ways for gas separation are expensive, and, hence, it is very important to reduce the cost and lower the energy consumption. Membrane technology is a relatively new separation process for natural gas purification with large growth potential, specifically for off-shore applications. The economics of any membrane separation process depend primarily on the intrinsic gas permeation properties of the membrane materials. All current commercial membranes for natural gas separation are made from polymers, which have several drawbacks, including low permeability, moderate selectivity, and poor stability in acid gas and hydrocarbon environments.
The recent development of polymeric materials called “polymers of intrinsic microporosity” (PIMs) provide a new class of high-performance membrane materials that are anticipated to be used in natural gas separation processes including, but not limited to, acid gas removal and separation of hydrocarbons from methane. PIM-7 is an excellent example of a material from the PIMs series for gas separation. It was selected for this work since it has not been extensively tested for its gas permeation properties to date. Specifically, sorption and mixed-gas permeation data were not available for PIM-7 prior to this work.
Sorption isotherms of N2, O2, CH4, CO2, C2H6, C3H8 and n-C4H10 were determined over a range of pressures at 35 °C for PIM-7 using a custom-designed dual-volume pressure decay system. Condensable hydrocarbon gases, such as C3H8 and n-C4H10, show significantly higher solubility than the other less condensable gas of the test series due to their high affinity to the polymer matrix. Dual-mode sorption model parameters were determined from the sorption isotherms. Henry’s law solubility, Langmuir capacity constant and the affinity constant increased with gas condensability. Permeability coefficients of He, H2, N2, O2, CH4, CO2, C2H6, C3H8 and n-C4H10 were measured at 35 °C and 2 atm feed pressure using a home-made constant-volume/variable pressure pure-gas permeation system. Hydrocarbon-induced plasticization of PIM-7 was confirmed by measuring the permeability coefficients of C3H8 and n-C4H10 as function of pressure at 35 °C.
Diffusion coefficients were calculated from the permeability and solubility data at 2 atm for all penetrants tested and as function of pressure for C3H8 and n-C4H10; the values for C3 and C4 increased significantly with pressure because of plasticization. Physical aging was studied by measuring the permeability coefficients of a number of gases in fresh and aged films. Mixed-gas permeation tests were performed for a feed mixture of 2 vol% n-butane and 98 vol% methane. Based on BET surface area measurements using N2 as a probe molecule, PIM-7 is a microporous polymer (S = 690 m2/g) and it was expected to exhibit selectivity for n-butane over methane, as previously observed for other microporous polymers, such as PIM-1 and PTMSP.…
Subjects/Keywords: Natural Gas; Gas Separation; Permeation; Sorption; PIM-7; PIMs; Mixed Gas
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APA (6th Edition):
Alaslai, N. Y. (2013). Gas Sorption, Diffusion and Permeation in a Polymer of Intrinsic Microporosity (PIM-7). (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/293348
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Alaslai, Nasser Y. “Gas Sorption, Diffusion and Permeation in a Polymer of Intrinsic Microporosity (PIM-7).” 2013. Thesis, King Abdullah University of Science and Technology. Accessed August 18, 2019.
http://hdl.handle.net/10754/293348.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Alaslai, Nasser Y. “Gas Sorption, Diffusion and Permeation in a Polymer of Intrinsic Microporosity (PIM-7).” 2013. Web. 18 Aug 2019.
Vancouver:
Alaslai NY. Gas Sorption, Diffusion and Permeation in a Polymer of Intrinsic Microporosity (PIM-7). [Internet] [Thesis]. King Abdullah University of Science and Technology; 2013. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/10754/293348.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Alaslai NY. Gas Sorption, Diffusion and Permeation in a Polymer of Intrinsic Microporosity (PIM-7). [Thesis]. King Abdullah University of Science and Technology; 2013. Available from: http://hdl.handle.net/10754/293348
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
10.
Shilton, Simon J.
The effect of spinning conditions on the gas permeation performance of hollow fibre membranes.
Degree: 1992, University of Strathclyde
URL: http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23488
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384842
Subjects/Keywords: 660; Gas separation
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APA (6th Edition):
Shilton, S. J. (1992). The effect of spinning conditions on the gas permeation performance of hollow fibre membranes. (Doctoral Dissertation). University of Strathclyde. Retrieved from http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23488 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384842
Chicago Manual of Style (16th Edition):
Shilton, Simon J. “The effect of spinning conditions on the gas permeation performance of hollow fibre membranes.” 1992. Doctoral Dissertation, University of Strathclyde. Accessed August 18, 2019.
http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23488 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384842.
MLA Handbook (7th Edition):
Shilton, Simon J. “The effect of spinning conditions on the gas permeation performance of hollow fibre membranes.” 1992. Web. 18 Aug 2019.
Vancouver:
Shilton SJ. The effect of spinning conditions on the gas permeation performance of hollow fibre membranes. [Internet] [Doctoral dissertation]. University of Strathclyde; 1992. [cited 2019 Aug 18].
Available from: http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23488 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384842.
Council of Science Editors:
Shilton SJ. The effect of spinning conditions on the gas permeation performance of hollow fibre membranes. [Doctoral Dissertation]. University of Strathclyde; 1992. Available from: http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23488 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384842
Penn State University
11.
Gaddes, David Edwin.
Innovative Designs for High Performance Micromachined Gas
Chromatographic Columns.
Degree: MS, Bioengineering, 2013, Penn State University
URL: https://etda.libraries.psu.edu/catalog/19964
► Gas chromatography (GC) is a versatile technique used in diverse fields such as biological/medical, environmental protection, pharmaceutical, and food/agricultural. This is the premier technique to…
(more)
▼ Gas chromatography (GC) is a versatile technique used
in diverse fields such as biological/medical, environmental
protection, pharmaceutical, and food/agricultural. This is the
premier technique to identify and quantify components of interest
from a complex mixture. However, the current GC systems are bulky
and expensive. Microfabricated gas chromatographic columns (µGCs)
have been developed to miniaturize the state of the art systems,
allowing for removal of the large and inefficient ovens as well as
fabrication of a micro-total analytical system (µTAS) for on-site
detection. The µGC devices also provide a platform for creation of
novel geometries and stationary phases unique to microfabricated
devices. Although there has been considerable success in
development of µGC columns and µTAS devices, currently
microfabricated devices have not matched the performance of
commercial columns in a number of areas. Firstly, microfabricated
columns have temperature limitations much lower than that of
commercial columns. To date, microfabricated columns have not
operated at temperatures above 250 °C due to the epoxies used in
the world-to-device connections, while standard commercial columns
operate at temperatures up to 350 °C. The thermal limitations of
the µGC devices prevent the use of these devices with a large
number of compounds typically separated using gas chromatography.
Additionally, the separation efficiency of the microfabricated
columns have not matched that of commercial columns and no direct
comparison of µGC columns to commercial columns has been made.
Finally, there is a need for a seamless world-to-device connection
to eliminate detrimental dead space and improve column efficiency.
Here we address the problems listed above. We have developed novel
microfabricated channel designs capable of improved chromatographic
performance and allowing for high throughput and lengths up to 10
meters. To operate at high temperatures (up to 400 °C) we have
fabricated interfacing and packaging techniques enabling
microfabricated columns and have demonstrated the first high
temperature separation with a µGC column. We have optimized the
world-to-device microfluidic interconnection removing dead volume
at the inlet. We have benchmarked the performance of the
microfabricated column against commercially available conventional
columns and displayed a clear solution to improve the separation
efficiency of microfabricated columns. We expect the results of
this work to further the µGC field in both research and commercial
aspects.
Subjects/Keywords: Gas Chromatography Microfabrication MEMS Chemical
Separation
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APA ·
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MLA ·
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APA (6th Edition):
Gaddes, D. E. (2013). Innovative Designs for High Performance Micromachined Gas
Chromatographic Columns. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/19964
Chicago Manual of Style (16th Edition):
Gaddes, David Edwin. “Innovative Designs for High Performance Micromachined Gas
Chromatographic Columns.” 2013. Masters Thesis, Penn State University. Accessed August 18, 2019.
https://etda.libraries.psu.edu/catalog/19964.
MLA Handbook (7th Edition):
Gaddes, David Edwin. “Innovative Designs for High Performance Micromachined Gas
Chromatographic Columns.” 2013. Web. 18 Aug 2019.
Vancouver:
Gaddes DE. Innovative Designs for High Performance Micromachined Gas
Chromatographic Columns. [Internet] [Masters thesis]. Penn State University; 2013. [cited 2019 Aug 18].
Available from: https://etda.libraries.psu.edu/catalog/19964.
Council of Science Editors:
Gaddes DE. Innovative Designs for High Performance Micromachined Gas
Chromatographic Columns. [Masters Thesis]. Penn State University; 2013. Available from: https://etda.libraries.psu.edu/catalog/19964
Oregon State University
12.
Hassan, Mohammed H.
An experimental and simulation investigation of gas transport in a microporous silica membran.
Degree: PhD, Chemical Engineering, 1994, Oregon State University
URL: http://hdl.handle.net/1957/35129
Subjects/Keywords: Gas separation membranes
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APA (6th Edition):
Hassan, M. H. (1994). An experimental and simulation investigation of gas transport in a microporous silica membran. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/35129
Chicago Manual of Style (16th Edition):
Hassan, Mohammed H. “An experimental and simulation investigation of gas transport in a microporous silica membran.” 1994. Doctoral Dissertation, Oregon State University. Accessed August 18, 2019.
http://hdl.handle.net/1957/35129.
MLA Handbook (7th Edition):
Hassan, Mohammed H. “An experimental and simulation investigation of gas transport in a microporous silica membran.” 1994. Web. 18 Aug 2019.
Vancouver:
Hassan MH. An experimental and simulation investigation of gas transport in a microporous silica membran. [Internet] [Doctoral dissertation]. Oregon State University; 1994. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/1957/35129.
Council of Science Editors:
Hassan MH. An experimental and simulation investigation of gas transport in a microporous silica membran. [Doctoral Dissertation]. Oregon State University; 1994. Available from: http://hdl.handle.net/1957/35129
Virginia Tech
13.
Borjigin, Hailun.
Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes.
Degree: PhD, Learning Sciences and Technologies, 2015, Virginia Tech
URL: http://hdl.handle.net/10919/74231
► This dissertation focuses on the synthesis and characterization of high performance polymers, especially polyimides, polybenzoxazoles and polybenzimidazoles for gas separation applications. An abundance of monomers…
(more)
▼ This dissertation focuses on the synthesis and characterization of high performance polymers, especially polyimides, polybenzoxazoles and polybenzimidazoles for
gas separation applications. An abundance of monomers and novel polymers were synthesized and fabricated into membranes.
Thermally rearranged polybenzoxazoles and their precursor polyimides were systematically studied with regard to size of pendant functional groups, thermal rearrangement conversion, and relationship of backbone structure/
gas transport properties. 3,3'-Diamino-4,4'-dihydroxybiphenyl was synthesized using an economical route. Meta and para oriented polyimides with different ortho-functionality were synthesized and these polymers were thermally rearranged into polybenzoxazoles. The polar hydroxyl functional groups on the polyimide backbone diminished the meta/para isomer effect of the permeability coefficients of the polymers and only a small difference between meta- and para-oriented polyhydroxyimides in permeability coefficients was observed. The TR polybenzoxazoles derived from meta/para-oriented isomeric polyimides with ortho functionality had similar
gas separation properties, especially for CO2/CH4
separation, and it is hypothesized that this is due to a lack of intersegmental mobility distinction between the two isomeric TR polymers. The TR polymers derived from the polyimides with acetate ortho-functional groups had significantly better
gas separation properties than ones derived from the precursor with hydroxyl ortho-functional groups.
Polybenzimidazoles were also investigated for use as
gas separation membranes. Polybenzimidazoles are some of the most thermally stable polymers. However, commercial polybenzimidazoles do not have good solubility in common solvents. The solubility issue was solved by incorporating sulfonyl linkages into the polybenzimidazole backbone using a 3,3',4,4'-tetraaminodiphenylsulfone (TADPS) monomer. 3,3',4,4'-Tetraaminodiphenylsulfone was synthesized by a novel route with higher overall yield and less steps than the traditional synthetic method. The TADPS based polybenzimidazoles also demonstrated better thermal stability than commercial polybenzimidazole. The meta/para oriented isomer effect on
gas transport properties is discussed. TADPS-based polybenzimidazoles exhibited H2/CO2
gas separation properties near or surpassing the upper bound with H2 permeabilities from 3.6 to 5.7 Barrer and selectivities from 10.1 to 32.2 at 35 °C.
Advisors/Committee Members: Riffle, Judy S. (committeechair), Mecham, Beverly S. (committee member), Esker, Alan R. (committee member), Turner, Sam Richard (committee member), Davis, Richey M. (committee member).
Subjects/Keywords: Gas Separation Membrane; Thermally Rearranged Polymers; Polybenzimidazoles
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APA (6th Edition):
Borjigin, H. (2015). Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/74231
Chicago Manual of Style (16th Edition):
Borjigin, Hailun. “Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes.” 2015. Doctoral Dissertation, Virginia Tech. Accessed August 18, 2019.
http://hdl.handle.net/10919/74231.
MLA Handbook (7th Edition):
Borjigin, Hailun. “Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes.” 2015. Web. 18 Aug 2019.
Vancouver:
Borjigin H. Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes. [Internet] [Doctoral dissertation]. Virginia Tech; 2015. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/10919/74231.
Council of Science Editors:
Borjigin H. Synthesis and Characterization of High Performance Polymers for Gas Separation Membranes. [Doctoral Dissertation]. Virginia Tech; 2015. Available from: http://hdl.handle.net/10919/74231
King Abdullah University of Science and Technology
14.
Hazazi, Khalid.
High-Performance Carbon Molecular Sieve Gas Separation Membranes Based on a Carbon-Rich Intrinsically Microporous Polyimide Precursor.
Degree: 2018, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/627771
► The objective of this study was to investigate the transport properties and the microstructure of CMS membranes derived from a carbon-rich intrinsically microporous polyimide precursor.…
(more)
▼ The objective of this study was to investigate the transport properties and the microstructure of CMS membranes derived from a carbon-rich intrinsically microporous polyimide precursor. CMS membranes were prepared by a heat treatment of the polyimide precursor using a well-defined heating protocol in a horizontal tube furnace up to 1000 °C. A nitrogen purge was kept inside the furnace to remove all the evolved by-products as the precursor started to decompose and carbonize. The microstructures of the carbon molecular sieve membranes (CMSMs) were examined using wide-angle x-ray diffraction, Raman spectra, N2 adsorption and CO2 adsorption.
The average interlayer spacing (d002) between the graphite plates was estimated using the data obtained by the WXRD. The average d002 decreased as a result of increasing the pyrolysis temperature; average d002 distances for CMS prepared at 700 and 1000 °C were estimated to be 0.40 to 0.38 nm, respectively. Raman spectra confirmed the progressive structural ordering as heat-treatment temperature increased. A substantial decrease in the intensity of the D band was observed as a function of pyrolysis temperature, indicating a decrease in the disordered structure. Graphitic structure and turbostratic carbon coexist in the as-prepared carbon membranes, of which the microcrystal size La and the stacking height Lc were increasing as a function of pyrolysis temperature.
N2 adsorption showed a remarkable increase in the BET surface area as a function of pyrolysis temperature. BET surface areas for the pristine and CMSs prepared at 700 to 900 °C were in the range of 650 to 680 m2/g with a remarkable shift in the pore size distribution toward the ultra- microporous region. CO2 adsorption was used to estimate the surface area for pores with sizes of less than 1 nm. Surface areas were observed to increase from 350 m2/g at 500 °C to 857 m2/g at 800 °C, and then started dropping slightly from 857 to 650 m2/g at 800 to 1000 °C, respectively. This is believed to be caused by pore shrinkage effect being severe after 800 °C, which caused some pores to be hard to spot by the CO2 adsorption technique. The transport properties of the pristine and CMS membranes were tested using pure gases He, H2, N2, CH4, CO2, and O2. From the pristine to SBFDA-DMN-700°C, the selectivity increased significantly, with a massive loss in the permeability except for He and H2. From SBFDA-DMN- 700 °C to 900 °C, a substantial increase in selectivity with a moderate decline in permeability was observed. Beyond 900 °C, the permeability again decreased moderately, but a tremendous increase in the selectivity for N2/CH4, CO2/CH4, and H2/CH4 was observed.
Subjects/Keywords: Membrane; Carbon molecular sieve; Gas Separation
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APA (6th Edition):
Hazazi, K. (2018). High-Performance Carbon Molecular Sieve Gas Separation Membranes Based on a Carbon-Rich Intrinsically Microporous Polyimide Precursor. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/627771
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hazazi, Khalid. “High-Performance Carbon Molecular Sieve Gas Separation Membranes Based on a Carbon-Rich Intrinsically Microporous Polyimide Precursor.” 2018. Thesis, King Abdullah University of Science and Technology. Accessed August 18, 2019.
http://hdl.handle.net/10754/627771.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hazazi, Khalid. “High-Performance Carbon Molecular Sieve Gas Separation Membranes Based on a Carbon-Rich Intrinsically Microporous Polyimide Precursor.” 2018. Web. 18 Aug 2019.
Vancouver:
Hazazi K. High-Performance Carbon Molecular Sieve Gas Separation Membranes Based on a Carbon-Rich Intrinsically Microporous Polyimide Precursor. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2018. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/10754/627771.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hazazi K. High-Performance Carbon Molecular Sieve Gas Separation Membranes Based on a Carbon-Rich Intrinsically Microporous Polyimide Precursor. [Thesis]. King Abdullah University of Science and Technology; 2018. Available from: http://hdl.handle.net/10754/627771
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Hong Kong University of Science and Technology
15.
Wang, Maojian CBME.
Optimization and integration method of integrated gasification combined cycle system based on novel simplified models.
Degree: 2017, Hong Kong University of Science and Technology
URL: https://doi.org/10.14711/thesis-991012551469003412
;
http://repository.ust.hk/ir/bitstream/1783.1-94624/1/th_redirect.html
► As promising power generation technology, the advantages of Integrated Gasification Combined Cycle (IGCC) system are confirmed. However, high electricity production cost is the bottleneck before…
(more)
▼ As promising power generation technology, the advantages of Integrated Gasification Combined Cycle (IGCC) system are confirmed. However, high electricity production cost is the bottleneck before fully commercialization. IGCC complicated process, including gasification, power and Air Separation Unit (ASU) island, provides opportunities to increase its efficiency through process optimization and integration. But there is a requirement of suitable models considering both prediction accuracy and flexibility to overcome existing barrier of large-scale optimization problem. In this thesis, the gap is fulfilled by proposing simplified models for three IGCC islands. Firstly, the novel simplified gasification island model is proposed based on reaction mechanism simplification using Water Gas Shit Reaction. After validation by experiment data, Cold Gas Efficiency optimization of IGCC plant gasifier is achieved with 10 % improvement. Then simplified model of power island is proposed and compared with rigorous commercial simulator. It is the foundation of further Gas Turbine performance optimization and Steam Turbine (ST) simultaneous parameter optimization and heat integration considering boiler feed water preheating. As the extension of simplified ST model, a novel shortcut model is proposed to optimize the regenerative retrofit for steam Rankine cycle. The most profitable regenerative scheme could generate from single to multiple extractions situations. After the validations with non-linear solver, the advantages of simple optimization procedures without building simulation and applying optimization algorithm are demonstrated in industrial case. Besides that, a simplified cryogenic ASU model is proposed and the non-standard operation conditions shows good performance for IGCC plant application. Finally, using all proposed models, the simultaneous parameter optimization and integration of IGCC system is completed in the aspect of economic and thermal performance. The simultaneous methodology is applied for gasification island firstly with 40 % profit and 4 % CGE improvements, and then for power and ASU island together with stepwise power output increment among cases.
Subjects/Keywords: Coal gasification; Synthesis gas; Gases; Separation
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APA (6th Edition):
Wang, M. C. (2017). Optimization and integration method of integrated gasification combined cycle system based on novel simplified models. (Thesis). Hong Kong University of Science and Technology. Retrieved from https://doi.org/10.14711/thesis-991012551469003412 ; http://repository.ust.hk/ir/bitstream/1783.1-94624/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wang, Maojian CBME. “Optimization and integration method of integrated gasification combined cycle system based on novel simplified models.” 2017. Thesis, Hong Kong University of Science and Technology. Accessed August 18, 2019.
https://doi.org/10.14711/thesis-991012551469003412 ; http://repository.ust.hk/ir/bitstream/1783.1-94624/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wang, Maojian CBME. “Optimization and integration method of integrated gasification combined cycle system based on novel simplified models.” 2017. Web. 18 Aug 2019.
Vancouver:
Wang MC. Optimization and integration method of integrated gasification combined cycle system based on novel simplified models. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2017. [cited 2019 Aug 18].
Available from: https://doi.org/10.14711/thesis-991012551469003412 ; http://repository.ust.hk/ir/bitstream/1783.1-94624/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wang MC. Optimization and integration method of integrated gasification combined cycle system based on novel simplified models. [Thesis]. Hong Kong University of Science and Technology; 2017. Available from: https://doi.org/10.14711/thesis-991012551469003412 ; http://repository.ust.hk/ir/bitstream/1783.1-94624/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Texas – Austin
16.
Rowe, Brandon William.
Physical aging of thin and ultrathin glassy polymer films.
Degree: Chemical Engineering, 2010, University of Texas – Austin
URL: http://hdl.handle.net/2152/ETD-UT-2010-05-930
► This research effort investigated the influence of confinement on the physical aging behavior of thin and ultrathin glassy polymer membranes. Membrane permeability changes with time…
(more)
▼ This research effort investigated the influence of confinement on the physical aging behavior of thin and ultrathin glassy polymer membranes. Membrane permeability
changes with time due to physical aging, and for reasons not completely understood, the rate of permeability change can become orders of magnitude faster in films thinner than one micron. Special experimental techniques were developed to enable the study of free standing, ultrathin glassy polymer films using
gas permeability measurements. The
gas
transport properties and physical aging behavior of free-standing glassy polysulfone (PSF) and Matrimid® films from 18-550 nm thick are presented. Physical aging persists in glassy films approaching the length scale of individual polymer coils. The membranes exhibited significant reductions in
gas permeability and increases in selectivity with
aging time. Additionally, the influence of physical aging on the free volume profile in thin
PSF films was investigated using variable energy positron annihilation lifetimespectroscopy (PALS). The films exhibited decreasing o-Ps lifetime during physical aging, while o-Ps intensity remained constant. The o-Ps lifetime was reduced at lower
implantation energies, indicating smaller free volume elements near the film surface. Thin films aged dramatically faster than bulk PSF and the PALS results agree favorably to behavior tracked by
gas permeability measurements.
The physical aging behavior of ultrathin films with different previous histories was also studied. The state of these materials was modulated by various conditioning treatments. Regardless of the previous history, the nature of the aging response was consistent with the aging behavior of an untreated film that was freshly quenched from
above Tg, i.e., permeability decreased and pure
gas selectivity increased with aging time.
However, the extent of aging-induced changes in transport properties of these materials
depended strongly on previous history. The properties of these ultrathin films deviate dramatically from bulk behavior,
and the nature of these deviations is consistent with enhanced mobility and reduced Tg in
ultrathin films, which allows them to reach a lower free volume state more quickly than bulk material. The Struik physical aging model was extended to account for the
influence of film thickness on aging, and was shown to accurately describe the experimental data.
Advisors/Committee Members: Paul, Donald R. (advisor), Freeman, B. D. (Benny D.) (advisor), Ganesan, Venkat (committee member), Eldridge, R B. (committee member), Kulkarni, Sudhir (committee member).
Subjects/Keywords: Physical aging; Gas separation; Membranes; Thin films
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Manager
APA (6th Edition):
Rowe, B. W. (2010). Physical aging of thin and ultrathin glassy polymer films. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2010-05-930
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rowe, Brandon William. “Physical aging of thin and ultrathin glassy polymer films.” 2010. Thesis, University of Texas – Austin. Accessed August 18, 2019.
http://hdl.handle.net/2152/ETD-UT-2010-05-930.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rowe, Brandon William. “Physical aging of thin and ultrathin glassy polymer films.” 2010. Web. 18 Aug 2019.
Vancouver:
Rowe BW. Physical aging of thin and ultrathin glassy polymer films. [Internet] [Thesis]. University of Texas – Austin; 2010. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/2152/ETD-UT-2010-05-930.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rowe BW. Physical aging of thin and ultrathin glassy polymer films. [Thesis]. University of Texas – Austin; 2010. Available from: http://hdl.handle.net/2152/ETD-UT-2010-05-930
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Texas – Austin
17.
Smith, Zachary Pace.
Fundamentals of gas sorption and transport in thermally rearranged polyimides.
Degree: Chemical Engineering, 2014, University of Texas – Austin
URL: http://hdl.handle.net/2152/30467
► Thermally rearranged polymers are formed from the solid-state thermal reaction of polyimides and polyamides that contain reactive groups ortho position to their diamine. These polymers…
(more)
▼ Thermally rearranged polymers are formed from the solid-state thermal reaction of polyimides and polyamides that contain reactive groups ortho position to their diamine. These polymers have shown outstanding transport properties for
gas separation applications. The thrust of this work is to critically examine the chemical and morphological structure of these polymers and to identify the fundamental contributions of
gas sorption to permeability. To accomplish this goal, a series of TR polymers and TR polymer precursors have been synthesized and investigated for transport properties. As a function of conversion, diffusivity increases more dramatically than sorption, which explains the outstanding permeabilities observed for these samples. Modifications to the polymer backbone structure, which can be achieved by adding rigid functional groups such as hexafluoroisopropylidene-functional linking groups, can further be used to improve permeabilities. The precursor used to form TR polymers has dramatic effects on the final polymer transport properties. Despite having nearly identical polymer structure, TR polymers formed from polyamide precursors have lower combinations of permeability and selectivity than TR polymers formed from polyimide precursors. In addition to structure-property studies with TR polymers, this thesis also present comparisons of permeability, diffusivity, and sorption of sparingly soluble gases (i.e., hydrogen and helium) for hydrocarbon-based polymer, highly fluorinated polymers, perfluoropolymers, and a silicon-based polymer. An explanation for the unique transport properties of perfluoropolymers is presented from the standpoint of the solution-diffusion model, whereby perfluoropolymers have uniquely different solubility selectivities than hydrocarbon-based polymers. Additionally, a large database of sorption, diffusion, and permeability coefficients is used to determine the contributions of free volume on solubility selectivity in polymers.
Advisors/Committee Members: Freeman, B. D. (Benny D.) (advisor), Paul, Donald R. (advisor), Willson, Carlton G (committee member), Sanchez, Isaac C (committee member), Hill, Anita J (committee member).
Subjects/Keywords: Polymers; Gas separation membranes; Thermal reactions
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APA (6th Edition):
Smith, Z. P. (2014). Fundamentals of gas sorption and transport in thermally rearranged polyimides. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/30467
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Smith, Zachary Pace. “Fundamentals of gas sorption and transport in thermally rearranged polyimides.” 2014. Thesis, University of Texas – Austin. Accessed August 18, 2019.
http://hdl.handle.net/2152/30467.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Smith, Zachary Pace. “Fundamentals of gas sorption and transport in thermally rearranged polyimides.” 2014. Web. 18 Aug 2019.
Vancouver:
Smith ZP. Fundamentals of gas sorption and transport in thermally rearranged polyimides. [Internet] [Thesis]. University of Texas – Austin; 2014. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/2152/30467.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Smith ZP. Fundamentals of gas sorption and transport in thermally rearranged polyimides. [Thesis]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/30467
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Salford
18.
El-Amari, Abdulla Ali.
Separation of acidic gases using hollow fibre membrane contractors.
Degree: PhD, 2002, University of Salford
URL: http://usir.salford.ac.uk/id/eprint/26653/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249007
► Gas absorption in hollow fibre contactors is being increasingly used due to their enormous surface area/volume ratio. The capability of the hollow fibre membrane modules…
(more)
▼ Gas absorption in hollow fibre contactors is being increasingly used due to their enormous surface area/volume ratio. The capability of the hollow fibre membrane modules for the removal of CO 2 and SO2 from a binary gas mixture has been investigated experimentally. Four different modules were used in this study. The membranes in modules one and two were made of microporous polypropylene. The third module was made of non-porous silicone rubber (polydimethylsiloxane) while the latter one was a polyvinylidenefluoride (PVDF) asymmetric hollow fibre membrane. The gas mixtures used in the experiments were composed of 9.5% CO2 and 1% SO2 in N 2 , which was introduced into the hollow fibre lumen, while the absorbent liquid was fed into the shell side of module. The absorbent liquids used were water, aqueous solutions of diethanolamine (DBA) and ammonia at different concentrations (5, 10 and 20 wt%). The effects of different operating conditions on the permeation process have been investigated for co-current and counter-current flow patterns. In addition, to improve the silicone rubber hollow fibre membrane performance, baffles were installed within the shell of the permeator to increase liquid fibre contact. The results obtained showed that the use of baffles within the shell of the permeator improved the separation performance of the non-porous membrane module without any substantial increase in the physical size of the contacting device. Studies also showed that improved performance was observed when the system was operated under a counter-current flow pattern. The results showed that the use of an absorbent liquid in the permeate side of the fibres increased the selectivity of the membranes used, and reduced the need to maintain a high pressure ratio across the membrane. A decrease in the feed gas flow rate or increase in liquid flow rate generally improved the removal of gases. The results showed that the use of aqueous reactive solutions as an absorbing medium in the permeate side of the hollow fibre permeator can significantly improve CO2 removal from the gas mixture. However, the main problem when using a microporous membrane coupled with aqueous solutions of diethanolamine as absorbent was wetting of the microporous membrane by amine solutions. For 862 separation, the highest removal was attained using the microporous membrane coupled with water as absorbent liquid. This demonstrates that a hollow fibre based device can be a very efficient gas liquid contactor. The separation process was simulated with a numerical model based on the effective permeabilities of gases and compared with the experimental results. The model simulations showed good agreement with the experimental observations.
Subjects/Keywords: 660; Gas separation
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APA (6th Edition):
El-Amari, A. A. (2002). Separation of acidic gases using hollow fibre membrane contractors. (Doctoral Dissertation). University of Salford. Retrieved from http://usir.salford.ac.uk/id/eprint/26653/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249007
Chicago Manual of Style (16th Edition):
El-Amari, Abdulla Ali. “Separation of acidic gases using hollow fibre membrane contractors.” 2002. Doctoral Dissertation, University of Salford. Accessed August 18, 2019.
http://usir.salford.ac.uk/id/eprint/26653/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249007.
MLA Handbook (7th Edition):
El-Amari, Abdulla Ali. “Separation of acidic gases using hollow fibre membrane contractors.” 2002. Web. 18 Aug 2019.
Vancouver:
El-Amari AA. Separation of acidic gases using hollow fibre membrane contractors. [Internet] [Doctoral dissertation]. University of Salford; 2002. [cited 2019 Aug 18].
Available from: http://usir.salford.ac.uk/id/eprint/26653/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249007.
Council of Science Editors:
El-Amari AA. Separation of acidic gases using hollow fibre membrane contractors. [Doctoral Dissertation]. University of Salford; 2002. Available from: http://usir.salford.ac.uk/id/eprint/26653/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249007
Texas A&M University
19.
Shah, Miral Naresh 1987-.
Synthesis and Characterization of Films and Membranes of Metal-Organic Framework (MOF) for Gas Separation Applications.
Degree: 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/148212
► Metal-Organic Frameworks (MOFs) are nanoporous framework materials with tunable pore size and functionality, and hence attractive for gas separation membrane applications. Zeolitic Imidazolate Frameworks (ZIFs),…
(more)
▼ Metal-Organic Frameworks (MOFs) are nanoporous framework materials with tunable pore size and functionality, and hence attractive for
gas separation membrane applications. Zeolitic Imidazolate Frameworks (ZIFs), a subclass of MOFs, are known for their high thermal and chemical stability. ZIF-8 has demonstrated potential to kinetically separate propane/propene in powder and membrane form. ZIF-8 membranes propane-propene
separation performance is superior in comparison to polymer, mixed matrix and carbon membranes.
The overarching theme of my research is to address challenges that hinder fabrication of MOF membranes on a commercial scale and in a reproducible and scalable manner. 1. Current approaches, are specific to a given ZIF, a general synthesis route is not available. Use of multiple steps for surface modification or seeding causes reproducibility and scalability issues. 2. Conventional fabrication techniques are batch processes, thereby limiting their commercialization. Here we demonstrate two new approaches that can potentially address these challenges.
First, we report one step in situ synthesis of ZIF-8 membranes on more commonly used porous ?-alumina supports. By incorporating sodium formate in the in situ growth solution, well intergrown ZIF-8 membranes were synthesized on unmodified supports. The mechanism by which sodium formate promotes heterogeneous nucleation was investigated. Sodium formate reacts with zinc source to form zinc oxide layer, which in turn promotes heterogeneous nucleation. Sodium formate promotes heterogeneous nucleation in other ZIF systems as well, leading to ZIF-7, Zn(Im)2 (ZIF-61 analogue), ZIF-90, and SIM-1 films. Thus one step in situ growth using sodium formate provides a simplified, reproducible and potentially general route for ZIF film fabrication.
One step in situ route, although advantageous; is still conventional in nature and batch process with long synthesis time. This limits commercialization, due to scalability and manufacturing cost issues. Taking advantage of coordination chemistry of MOFs and using temperature as driving force, continuous well-intergrown membranes of HKUST-1 and ZIF-8 in relatively short time (15 min) using Rapid Thermal Deposition (RTD). With minimum precursor consumption and simplified synthesis protocol, RTD provides potential for a continuous, scalable, reproducible and commercializable route for MOF membrane fabrication. RTD-prepared MOF membranes show improved
separation performances, indicating improved microstructure.
Advisors/Committee Members: Jeong, Hae-Kwon (advisor), Akbulut, Mustafa (committee member), Zhou, Hong-Cai (Joe) (committee member).
Subjects/Keywords: zeolites; propylene/propane separation; gas separation; membranes; films; Metal-Organic Frameworks
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APA (6th Edition):
Shah, M. N. 1. (2012). Synthesis and Characterization of Films and Membranes of Metal-Organic Framework (MOF) for Gas Separation Applications. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148212
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shah, Miral Naresh 1987-. “Synthesis and Characterization of Films and Membranes of Metal-Organic Framework (MOF) for Gas Separation Applications.” 2012. Thesis, Texas A&M University. Accessed August 18, 2019.
http://hdl.handle.net/1969.1/148212.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shah, Miral Naresh 1987-. “Synthesis and Characterization of Films and Membranes of Metal-Organic Framework (MOF) for Gas Separation Applications.” 2012. Web. 18 Aug 2019.
Vancouver:
Shah MN1. Synthesis and Characterization of Films and Membranes of Metal-Organic Framework (MOF) for Gas Separation Applications. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/1969.1/148212.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shah MN1. Synthesis and Characterization of Films and Membranes of Metal-Organic Framework (MOF) for Gas Separation Applications. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148212
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
20.
Sutthisa Konruang.
Preparation of polysulfone and polyethylene membrane and surface modification by plasma and UV radiation for oxygen/nitrogen and carbon dioxide/methane gas separation
.
Degree: คณะวิทยาศาสตร์ ภาควิชาฟิสิกส์, 2015, Prince of Songkla University
URL: http://kb.psu.ac.th/psukb/handle/2010/10215
Subjects/Keywords: Gas separation membranes;
Gases Separation
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APA (6th Edition):
Konruang, S. (2015). Preparation of polysulfone and polyethylene membrane and surface modification by plasma and UV radiation for oxygen/nitrogen and carbon dioxide/methane gas separation
. (Thesis). Prince of Songkla University. Retrieved from http://kb.psu.ac.th/psukb/handle/2010/10215
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Konruang, Sutthisa. “Preparation of polysulfone and polyethylene membrane and surface modification by plasma and UV radiation for oxygen/nitrogen and carbon dioxide/methane gas separation
.” 2015. Thesis, Prince of Songkla University. Accessed August 18, 2019.
http://kb.psu.ac.th/psukb/handle/2010/10215.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Konruang, Sutthisa. “Preparation of polysulfone and polyethylene membrane and surface modification by plasma and UV radiation for oxygen/nitrogen and carbon dioxide/methane gas separation
.” 2015. Web. 18 Aug 2019.
Vancouver:
Konruang S. Preparation of polysulfone and polyethylene membrane and surface modification by plasma and UV radiation for oxygen/nitrogen and carbon dioxide/methane gas separation
. [Internet] [Thesis]. Prince of Songkla University; 2015. [cited 2019 Aug 18].
Available from: http://kb.psu.ac.th/psukb/handle/2010/10215.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Konruang S. Preparation of polysulfone and polyethylene membrane and surface modification by plasma and UV radiation for oxygen/nitrogen and carbon dioxide/methane gas separation
. [Thesis]. Prince of Songkla University; 2015. Available from: http://kb.psu.ac.th/psukb/handle/2010/10215
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Georgia Tech
21.
Bae, Tae-Hyun.
Engineering nanoporous materials for application in gas separation membranes.
Degree: PhD, Chemical Engineering, 2010, Georgia Tech
URL: http://hdl.handle.net/1853/42712
► The main theme of this dissertation is to engineer nanoporous materials and nanostructured surfaces for applications in gas separation membranes. Tunable methods have been developed…
(more)
▼ The main theme of this dissertation is to engineer nanoporous materials and nanostructured surfaces for applications in
gas separation membranes. Tunable methods have been developed to create inorganic hydroxide nanostructures on zeolite surfaces, and used to control the inorganic/polymer interfacial morphology in zeolite/polymer composite membranes. The study of the structure-property relationships in this material system showed that appropriate tuning of the surface modification methods leads to quite promising structural and permeation properties of the membranes made with the modified zeolites. First, a facile solvothermal deposition process was developed to prepare roughened inorganic nanostructures on zeolite pure silica MFI crystal surfaces. The functionalized zeolite crystals resulted in high-quality ̒mixed matrix̕ membranes, wherein the zeolite crystals were well-adhered to the polymeric matrix. Substantially enhanced
gas separation characteristics were observed in mixed matrix membranes containing solvothermally modified MFI crystals.
Gas permeation measurements on membranes containing nonporous uncalcined MFI revealed that the performance enhancements were due to significantly enhanced MFI-polymer adhesion and distribution of the MFI crystals. Solvothermal deposition of inorganic nanostructures was successfully applied to aluminosilicate LTA surfaces. Solvothermal treatment of LTA was tuned to deposit smaller/finer Mg(OH)₂ nanostructures, resulting in a more highly roughened zeolite surface. Characterization of particles and mixed matrix membranes revealed that the solvothermally surface-treated LTA particles were promising for application in mixed matrix membranes. Zeolite LTA materials with highly roughened surfaces were also successfully prepared by a new method: the ion-exchange-induced growth of Mg(OH)₂ nanostructures using the zeolite as the source of the Mg²⁺ ions. The size/shape of the inorganic nanostructures was tuned by adjusting several parameters such as the pH of the reagent solution and the amount of magnesium in the substrates and systematic modification of reaction conditions allowed generation of a good candidate for application in mixed matrix membranes. Zeolite/polymer adhesion properties in mixed matrix membranes were improved after the surface treatment compared to the untreated bare LTA. Surface modified zeolite 5A/6FDA-DAM mixed matrix membranes showed significant enhancement in CO₂ permeability with slight increases in CO₂/CH₄ selectivity as compared to the pure polymer membrane. The CO₂/CH₄ selectivity of the membrane containing surface treated zeolite 5A was much higher than that of membrane with untreated zeolite 5A. In addition, the use of metal organic framework (MOF) materials has been explored in mixed matrix membrane applications. ZIF-90 crystals with submicron and 2-μm sizes were successfully synthesized by a nonsolvent induced crystallization technique. Structural investigation revealed that the ZIF-90 particles synthesized by this method had high crystallinity,…
Advisors/Committee Members: Jones, Christopher (Committee Co-Chair), Nair, Sankar (Committee Co-Chair), Koros, William (Committee Member), Meredith, Carson (Committee Member), Wang, Zhong Lin (Committee Member).
Subjects/Keywords: Gas separation; Membrane; Zeolite; Metal organic framework; Molecular sieve; Polymer composite; Gas separation membranes; Membranes (Technology); Gases Separation; Membranes (Technology); Adsorption
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APA (6th Edition):
Bae, T. (2010). Engineering nanoporous materials for application in gas separation membranes. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/42712
Chicago Manual of Style (16th Edition):
Bae, Tae-Hyun. “Engineering nanoporous materials for application in gas separation membranes.” 2010. Doctoral Dissertation, Georgia Tech. Accessed August 18, 2019.
http://hdl.handle.net/1853/42712.
MLA Handbook (7th Edition):
Bae, Tae-Hyun. “Engineering nanoporous materials for application in gas separation membranes.” 2010. Web. 18 Aug 2019.
Vancouver:
Bae T. Engineering nanoporous materials for application in gas separation membranes. [Internet] [Doctoral dissertation]. Georgia Tech; 2010. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/1853/42712.
Council of Science Editors:
Bae T. Engineering nanoporous materials for application in gas separation membranes. [Doctoral Dissertation]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/42712
University of Surrey
22.
Zone, Ian Robert.
Dynamics and control of a pressure swing adsorption process.
Degree: 1998, University of Surrey
URL: http://epubs.surrey.ac.uk/762/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298924
Subjects/Keywords: 660; Gas separation; Gas purification
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APA (6th Edition):
Zone, I. R. (1998). Dynamics and control of a pressure swing adsorption process. (Doctoral Dissertation). University of Surrey. Retrieved from http://epubs.surrey.ac.uk/762/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298924
Chicago Manual of Style (16th Edition):
Zone, Ian Robert. “Dynamics and control of a pressure swing adsorption process.” 1998. Doctoral Dissertation, University of Surrey. Accessed August 18, 2019.
http://epubs.surrey.ac.uk/762/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298924.
MLA Handbook (7th Edition):
Zone, Ian Robert. “Dynamics and control of a pressure swing adsorption process.” 1998. Web. 18 Aug 2019.
Vancouver:
Zone IR. Dynamics and control of a pressure swing adsorption process. [Internet] [Doctoral dissertation]. University of Surrey; 1998. [cited 2019 Aug 18].
Available from: http://epubs.surrey.ac.uk/762/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298924.
Council of Science Editors:
Zone IR. Dynamics and control of a pressure swing adsorption process. [Doctoral Dissertation]. University of Surrey; 1998. Available from: http://epubs.surrey.ac.uk/762/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298924
Georgia Tech
23.
Pahinkar, Darshan Gopalrao.
Temperature swing adsorption processes for gas separation.
Degree: PhD, Mechanical Engineering, 2016, Georgia Tech
URL: http://hdl.handle.net/1853/56348
► Natural gas has become increasingly important as a fuel source with lower environmental impact; therefore, there is a growing need for scalable natural gas purification…
(more)
▼ Natural
gas has become increasingly important as a fuel source with lower environmental impact; therefore, there is a growing need for scalable natural
gas purification systems with small footprints. Current industrial purification systems are based on absorption, membrane
separation, or adsorption techniques; however, each of these technologies requires large capital costs or suffers from scalability issues. Adsorption-based
separation techniques are categorized into pressure-swing adsorption (PSA) and temperature-swing adsorption (TSA). Among adsorption-based
gas purification techniques, PSA has typically been preferred over TSA due to the ease of operation and reliability. TSA processes have not commonly been used for industrial
gas separation due to low thermal conductivity of the adsorbent bed, which causes difficulty in desorbing impurities and regenerating the adsorbent. However, the high heat and mass transfer coefficients possible with microchannels open the possibility of using the TSA process for
gas purification.
This work investigated the fluid mechanics and coupled heat and mass transfer processes within a microchannel monolith with a polymer-adsorbent matrix coating the inner walls of the microchannels during TSA-based
gas separation. The concept involved
separation of carbon dioxide from methane by passing the feed
gas through microchannels, followed by sequential flow of desorbing hot liquid, cooling liquid, and purge
gas through the same microchannels. It was found that for selected operating conditions and geometries, the process showed merit when compared to current technologies. A combination of spatially- and temporally-resolved analyses was conducted to assess these processes and select optimal configurations and process parameters. Experimental validation followed, wherein the adsorption stage of the
separation process in adsorbent-coated microchannels was measured and analyzed using mass spectrometry. The combination of measurements and analyses was used to develop validated models and provide design guidance for TSA processes.
Advisors/Committee Members: Garimella, Srinivas (advisor), Graham, Samuel (committee member), Kumar, Satish (committee member), Jeter, Sheldon (committee member), Koros, William (committee member).
Subjects/Keywords: Temperature swing adsorption; Microchannels; Natural gas purification; Gas separation
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APA (6th Edition):
Pahinkar, D. G. (2016). Temperature swing adsorption processes for gas separation. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/56348
Chicago Manual of Style (16th Edition):
Pahinkar, Darshan Gopalrao. “Temperature swing adsorption processes for gas separation.” 2016. Doctoral Dissertation, Georgia Tech. Accessed August 18, 2019.
http://hdl.handle.net/1853/56348.
MLA Handbook (7th Edition):
Pahinkar, Darshan Gopalrao. “Temperature swing adsorption processes for gas separation.” 2016. Web. 18 Aug 2019.
Vancouver:
Pahinkar DG. Temperature swing adsorption processes for gas separation. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/1853/56348.
Council of Science Editors:
Pahinkar DG. Temperature swing adsorption processes for gas separation. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/56348
ETH Zürich
24.
Droudian, Amirhossein.
Separative Gas Transport in Ultra-Thin Membranes.
Degree: 2018, ETH Zürich
URL: http://hdl.handle.net/20.500.11850/309045
► Membrane-based processes are regarded as sustainable replacement to traditionally used energy-intensive gas separation methods. The preferred membrane material should be able to operate at harsh…
(more)
▼ Membrane-based processes are regarded as sustainable replacement to traditionally used energy-intensive
gas separation methods. The preferred membrane material should be able to operate at harsh
separation condition, demonstrate high permeance and selectivity to minimize compression energy and
separation stages. Continuous research has been focused on developing more permeable, selective and durable membranes. It is a common belief that membranes facilitate better process efficiency with higher permeance, which can be possibly achieved at lower thicknesses. Developments in the nanotechnology research area enabled researchers to fabricate sub -1000 nm thick membranes. However, it is yet unclear, how
gas permeance and selectivity vary in the ultra-thin materials in comparison to their bulk value, especially in the sub-100 nm regime of thickness. To date, fabrication of defective films obstructs drawing solid conclusion regarding transport phenomena in ultra-thin regime of thickness.
Here,
gas transport and
separation are investigated through two types of ultra-thin membrane materials:
1. Dense polymers down to 20 nm thickness.
2. Porous layers as thin as single-atom-thick graphene.
Gas transport is studied in semi-crystalline and fully amorphous, liquid-like polymers. In a first-time demonstration, semi-crystalline polyamide/imide nanofilms are synthesized at the vapor-liquid interface over CNT-buckypaper and also porous graphene scaffolds in a lab scale. Amorphous oligomeric layers are synthesized via stage-wise physical vapor deposition on a porous support.
Gas permeance in the semi-crystalline layers is defined by Fickian diffusion and shows a maximum at the intermediate thickness of 30 nm. Reducing the thickness decreases the diffusion length, but at the same time would decrease the diameter of the diffusion path leading to formation of the maximum. In thin, amorphous, liquid-like polymer layers, the entrance event to the matrix imposes impedance as significant as Fickian diffusion through the matrix. At a certain critical length, entrance event would define completely the transport rate. Thus, the permeance might not necessary increase by reducing the thickness of the dense polymers at the ultra-thin regime.
In addition to thickness, pore diameter is another influencing factor in
gas transport through microporous material. Investigation of
gas transport through zero-thick porous graphene revealed the pore size dependency of permeance and selectivity in the transition regime between free molecular and collective flow, explained by intermolecular collision between gases at the entrance of the pores. In a further investigation, controlled vapor deposition of amorphous polymer on the porous support enabled capturing two distinguished transitions from collective transport toward solution-diffusion mechanism.
The fabricated polymer-graphene nanofilms demonstrate two orders of magnitude higher permeance than the-state-of-the-art membranes. The polymer-CNT nanofilms benefit from antiplasticization property…
Advisors/Committee Members: Jenny, Patrick, Sirkar, Kamalesh, Torrilhon, Manuel.
Subjects/Keywords: Membrane; Gas transport; Ultra-thin; Separation; Gas osmosis
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APA (6th Edition):
Droudian, A. (2018). Separative Gas Transport in Ultra-Thin Membranes. (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/309045
Chicago Manual of Style (16th Edition):
Droudian, Amirhossein. “Separative Gas Transport in Ultra-Thin Membranes.” 2018. Doctoral Dissertation, ETH Zürich. Accessed August 18, 2019.
http://hdl.handle.net/20.500.11850/309045.
MLA Handbook (7th Edition):
Droudian, Amirhossein. “Separative Gas Transport in Ultra-Thin Membranes.” 2018. Web. 18 Aug 2019.
Vancouver:
Droudian A. Separative Gas Transport in Ultra-Thin Membranes. [Internet] [Doctoral dissertation]. ETH Zürich; 2018. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/20.500.11850/309045.
Council of Science Editors:
Droudian A. Separative Gas Transport in Ultra-Thin Membranes. [Doctoral Dissertation]. ETH Zürich; 2018. Available from: http://hdl.handle.net/20.500.11850/309045
Colorado School of Mines
25.
Khan, Muhammad N.
Phase equilibria modeling of inhibited gas hydrate systems including salts : applications in flow assurance, seawater desalination and gas separation.
Degree: PhD, Chemical and Biological Engineering, 2016, Colorado School of Mines
URL: http://hdl.handle.net/11124/170013
► Accurate hydrate phase equilibria and vapor-liquid equilibria predictions are critical to the safe and economic design of flow assurance, gas processing, and seawater desalination technologies.…
(more)
▼ Accurate hydrate phase equilibria and vapor-liquid equilibria predictions are critical to the safe and economic design of flow assurance,
gas processing, and seawater desalination technologies. Inaccurate predictions of vapor-liquid equilibria can also lead to erroneous hydrate phase equilibria predictions. Hydrate phase equilibria predictions typically use the classical van der Waals and Platteeuw (vdWP) model based on statistical thermodynamics, with some modifications (e.g. CSMGem, with Gibbs Energy Minimization). In this thesis work, the vdWP model with Gibbs Energy Minimization algorithm was developed in Matlab. The developed algorithm was evaluated by first investigating the effect of hydrogen (H2) concentration on the phase equilibria of sH hydrate (i.e. H2O+CH4+H2+methylcyclohexane (MCH) quaternary systems). The predictions were shown to be in close agreement with experimental phase equilibria measurements. Cage occupancies of methane and hydrogen in sH hydrate were predicted to increase with increasing pressure, and the extent of occupation was found to be dependent on the methane: hydrogen ratio in the feed
gas. Current hydrate phase equilibria predictions (using different models, e.g. CSMGem, Multiflash and PVTsim) for inhibited systems in subsea pipelines (with salts, e.g. NaCl, KCl, CaCl2, also thermodynamic hydrate inhibitors (THIs), e.g. methanol, monoethylene glycol) exhibit large errors. The unavailability of phase equilibria data and absence of an association equation of state in CSMGem leads to problems in predicting the phase equilibria of associating fluids and inhibited systems. Therefore, the current CSMGem model is not reliable for predicting these inhibited systems. Such thermodynamic calculations are critical to flow assurance and desalination process design. To overcome these limitations this work revisited the fluid model and a new fluid model is proposed for phase equilibria predictions; an association equation of state has been developed and applied to predict fluid phase properties for a wide range of hydrocarbons (low to high MWt), polar components and electrolytes (salts). Five parameters of the association equation of state were determined for the associating components by simultaneous minimization of absolute errors in saturated liquid densities and vapor pressures, with comparisons to experimental data. In order to predict the phase equilibria of
gas hydrates without inhibitors, the proposed association equation of state needs to be tuned with vapor-liquid equilibria. In this thesis work experimental hydrate phase equilibria and vapor-liquid equilibria data (over a range of temperature, pressure and composition) were collated and utilized to tune the fluid and hydrate models. Binary interaction parameters were optimized for a range of hydrate formers, including methane, ethane, nitrogen and hydrogen in combination with all other available hydrocarbons. Different equations of state were also used to predict the vapor-liquid equilibria for mixtures of methane, ethane, nitrogen and…
Advisors/Committee Members: Koh, Carolyn A. (Carolyn Ann) (advisor), Peters, Cor J. (advisor), Zerpa, Luis E. (committee member), Way, J. Douglas (committee member), Krebs, Melissa D. (committee member).
Subjects/Keywords: Desalination; Electrolyte; Gas Hydrates; Gas separation; MSA; Phase equilibria
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APA (6th Edition):
Khan, M. N. (2016). Phase equilibria modeling of inhibited gas hydrate systems including salts : applications in flow assurance, seawater desalination and gas separation. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/170013
Chicago Manual of Style (16th Edition):
Khan, Muhammad N. “Phase equilibria modeling of inhibited gas hydrate systems including salts : applications in flow assurance, seawater desalination and gas separation.” 2016. Doctoral Dissertation, Colorado School of Mines. Accessed August 18, 2019.
http://hdl.handle.net/11124/170013.
MLA Handbook (7th Edition):
Khan, Muhammad N. “Phase equilibria modeling of inhibited gas hydrate systems including salts : applications in flow assurance, seawater desalination and gas separation.” 2016. Web. 18 Aug 2019.
Vancouver:
Khan MN. Phase equilibria modeling of inhibited gas hydrate systems including salts : applications in flow assurance, seawater desalination and gas separation. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2016. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/11124/170013.
Council of Science Editors:
Khan MN. Phase equilibria modeling of inhibited gas hydrate systems including salts : applications in flow assurance, seawater desalination and gas separation. [Doctoral Dissertation]. Colorado School of Mines; 2016. Available from: http://hdl.handle.net/11124/170013
Virginia Commonwealth University
26.
Sekizkardes, Ali Kemal, PhD.
Pyrene-Derived Porous Organic Polymers: Design, Synthesis, and Application to Gas Storage and Separation.
Degree: PhD, Chemistry, 2014, Virginia Commonwealth University
URL: https://scholarscompass.vcu.edu/etd/3649
► Porous organic polymers (POPs) received great attention in recent years because of their novel properties such as permanent porosity, adjustable chemical nature, and remarkable…
(more)
▼ Porous organic polymers (POPs) received great attention in recent years because of their novel properties such as permanent porosity, adjustable chemical nature, and remarkable thermal and chemical stability. These attractive features make POPs very promising candidates for use in
gas separation and storage applications. In particular, CO
2 capture and
separation from
gas mixtures by POPs have been intensively investigated in recent years because of the greenhouse nature of CO
2, which is considered a leading cause for global warming. CO
2 chemical absorption by amine solutions from the flue
gas of coal-fired power plants suffers from several challenges such as high-energy consumption in desorption, chemical instability, volatility, and corrosive nature, limiting the widespread use of this technology. To mitigate these limitations, new adsorbents with improved CO
2 capturing properties need to be designed, synthesized, and tested. Alternatively, the use of cleaner fuels such as methane can reduce CO
2 release or completely eliminates it in the case of hydrogen. However, the on-board storage of methane and hydrogen for automotive applications remains a great challenge.
With these considerations in mind, our research goals in this dissertation focus on the systematic design and synthesis of N-rich POPs and their use in small
gas (H
2 and CH
4) storage as well as selective CO
2 capture from
gas mixtures. In particular, we have studied the effect of integrating pyrene and triazine building units into benzimidazole-linked polymers (BILPs) and covalent organic frameworks (COFs) on
gas storage and
separation. We have found that pyrene-based BILPs exhibit remarkable selective CO
2 capturing capacities under industrial settings (VAS, PSA). However the methane and hydrogen storage capacities of BILPs were found to be only modest especially at high pressure due to their moderate surface area and pore volume. We addressed these limitations by the synthesis of a highly porous imine-linked COF (ILCOF-1), which has very high surface area and improved hydrogen and methane uptakes when compared to BILPs. We have demonstrated that the use of pyrene in BILPs and COFs can direct frameworks growth through - stacking and improve porosity and pore volume whereas the use of triazine is instrumental in improving the binding affinity of the frameworks towards CO
2.
Advisors/Committee Members: Hani M. El-Kaderi.
Subjects/Keywords: Porous Polymers; Nanoporous Materials; Gas Separation; Gas Storage; CO2 capture
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APA (6th Edition):
Sekizkardes, Ali Kemal, P. (2014). Pyrene-Derived Porous Organic Polymers: Design, Synthesis, and Application to Gas Storage and Separation. (Doctoral Dissertation). Virginia Commonwealth University. Retrieved from https://scholarscompass.vcu.edu/etd/3649
Chicago Manual of Style (16th Edition):
Sekizkardes, Ali Kemal, PhD. “Pyrene-Derived Porous Organic Polymers: Design, Synthesis, and Application to Gas Storage and Separation.” 2014. Doctoral Dissertation, Virginia Commonwealth University. Accessed August 18, 2019.
https://scholarscompass.vcu.edu/etd/3649.
MLA Handbook (7th Edition):
Sekizkardes, Ali Kemal, PhD. “Pyrene-Derived Porous Organic Polymers: Design, Synthesis, and Application to Gas Storage and Separation.” 2014. Web. 18 Aug 2019.
Vancouver:
Sekizkardes, Ali Kemal P. Pyrene-Derived Porous Organic Polymers: Design, Synthesis, and Application to Gas Storage and Separation. [Internet] [Doctoral dissertation]. Virginia Commonwealth University; 2014. [cited 2019 Aug 18].
Available from: https://scholarscompass.vcu.edu/etd/3649.
Council of Science Editors:
Sekizkardes, Ali Kemal P. Pyrene-Derived Porous Organic Polymers: Design, Synthesis, and Application to Gas Storage and Separation. [Doctoral Dissertation]. Virginia Commonwealth University; 2014. Available from: https://scholarscompass.vcu.edu/etd/3649
University of New South Wales
27.
Dong, Guangxi.
Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas.
Degree: Chemical Sciences & Engineering, 2011, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/50795
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9690/SOURCE02?view=true
► Polymeric membrane has been recognized as an energy efficient and economical approach for many industrial gas separation applications, including natural gas purification. Matrimid 5218® has…
(more)
▼ Polymeric membrane has been recognized as an energy efficient and economical approach for many industrial gas separation applications, including natural gas purification. Matrimid 5218® has been used as a benchmark polymer, due to its combination of high selectivity and acceptable permeance, as well as its excellent mechanical properties and commercial availability.Based on series of comprehensive experimental studies, we have evaluated many of the critical fabrication parameters and optimized those parameters as regard to the membrane physical and separation properties. Asymmetric hollow fibers with CO2/CH4 separation factors up to 67 were successfully fabricated under the optimum fabrication conditions. Our further thermodynamic analysis based on Hansen’s solubility parameter and kinetic analysis based on Hayduk and Minhas correlations resulted consistent observations with the experimental results including cloud point experiments, SEM images, and the gas separation properties. In this study, a nodule structure model was developed based on the nucleation and growth and dual mode sorption model to gain a comprehensive understanding of the plasticization phenomenon and to link the bridge between membrane formation mechanisms with membrane morphology and plasticization phenomenon.Gas sorption tests were performed on the in-house fabricated Matrimid hollow fibers with various ranges of separation properties, and the Henry’s and Langmuir sorption isotherms were decoupled and compared against the pressure. The sorption observations accompanied with the CO2 conditioning experimental results confirmed that Matrimid hollow fiber adsorbed more CO2 gas penetrants in Henry’s sites at low-pressure range were prone to the plasticization.In this study, thermal annealing as a post-treatment to enhance membrane’s plasticization resistance was evaluated. CO2 sorption tests provided solid evidence to prove the suppression of plasticization achieved by thermal annealing was partially because the thermal annealing alters the ratio of Henry’s and Langmuir sorption sites and consequently shift the plasticization pressure to a higher level. Other techniques were also adopted in this study to characterize the treated hollow fiber including SEM, DSC measurements as well as dissolution tests.
Subjects/Keywords: CO2 removal; Asymmetric hollow fiber; Gas separation; Natural gas; Plasticization
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APA (6th Edition):
Dong, G. (2011). Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/50795 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9690/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Dong, Guangxi. “Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas.” 2011. Doctoral Dissertation, University of New South Wales. Accessed August 18, 2019.
http://handle.unsw.edu.au/1959.4/50795 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9690/SOURCE02?view=true.
MLA Handbook (7th Edition):
Dong, Guangxi. “Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas.” 2011. Web. 18 Aug 2019.
Vancouver:
Dong G. Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas. [Internet] [Doctoral dissertation]. University of New South Wales; 2011. [cited 2019 Aug 18].
Available from: http://handle.unsw.edu.au/1959.4/50795 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9690/SOURCE02?view=true.
Council of Science Editors:
Dong G. Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas. [Doctoral Dissertation]. University of New South Wales; 2011. Available from: http://handle.unsw.edu.au/1959.4/50795 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9690/SOURCE02?view=true
Georgia Tech
28.
Ward, Jason Keith.
Crosslinkable mixed matrix membranes for the purification of natural gas.
Degree: PhD, Chemical Engineering, 2010, Georgia Tech
URL: http://hdl.handle.net/1853/39465
► Mixed matrix nanocomposite membranes composed of a crosslinkable polyimide matrix and high-silica molecular sieve particles were developed for purifying natural gas. It was shown that…
(more)
▼ Mixed matrix nanocomposite membranes composed of a crosslinkable polyimide matrix and high-silica molecular sieve particles were developed for purifying natural
gas. It was shown that ideal mixed matrix effects were not possible without sieve surface modification. A previously developed Grignard procedure was utilized to deposit magnesium hydroxide nanostructures on the sieve surface in order to enhance polymer adhesion. Analyses of Grignard-treated sieves pointed to the formation of non-selective voids within the surface deposited layer. These voids were suspected to lead to lower-than-expected membrane performance. In order to improve membrane transport, a reactive sizing procedure was developed to fill these voids with polyimide-miscible material. In a serendipitous discovery, as-received sieves – when treated with this reactive sizing procedure – resulted in nearly identical membrane performance as reactive-sized, Grignard-treated sieves. This observation lead to the speculation of a non-ideal transport mechanism in mixed matrix membranes.
Advisors/Committee Members: Koros, William (Committee Chair), Beckham, Haskell (Committee Member), Jones, Christopher (Committee Member), Miller, Stephen (Committee Member), Nair, Sankar (Committee Member).
Subjects/Keywords: Nanocomposite; Mixed matrix membrane; Polyimide; Gas separation; Crosslinkable polymer membrane; Natural gas Purification; Gas separation membranes; Crosslinked polymers
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APA (6th Edition):
Ward, J. K. (2010). Crosslinkable mixed matrix membranes for the purification of natural gas. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/39465
Chicago Manual of Style (16th Edition):
Ward, Jason Keith. “Crosslinkable mixed matrix membranes for the purification of natural gas.” 2010. Doctoral Dissertation, Georgia Tech. Accessed August 18, 2019.
http://hdl.handle.net/1853/39465.
MLA Handbook (7th Edition):
Ward, Jason Keith. “Crosslinkable mixed matrix membranes for the purification of natural gas.” 2010. Web. 18 Aug 2019.
Vancouver:
Ward JK. Crosslinkable mixed matrix membranes for the purification of natural gas. [Internet] [Doctoral dissertation]. Georgia Tech; 2010. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/1853/39465.
Council of Science Editors:
Ward JK. Crosslinkable mixed matrix membranes for the purification of natural gas. [Doctoral Dissertation]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/39465
King Abdullah University of Science and Technology
29.
Alhazmi, Abdulrahman.
Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation.
Degree: 2017, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/623653
► The use of polymeric membranes for natural gas separation has rapidly increased during the past three decades, particularly for carbon dioxide separation from natural gas.…
(more)
▼ The use of polymeric membranes for natural gas separation has rapidly increased during the past three decades, particularly for carbon dioxide separation from natural gas. Another valuable application is the separation of heavy hydrocarbons from methane (fuel gas conditioning), more importantly for remote area and off-shore applications. A new potential polymeric membrane that might be utilized for natural gas separations is a Tröger’s base ladder polymer (PIM-Trip-TB-2). This glassy polymeric membrane was synthesized by the polymerization reaction of 9, 10-dimethyl-2,6 (7) diaminotriptycene with dimethoxymethane. In this research, the polymer was selected due to its high surface area and highly interconnected microporous structure. Sorption isotherms of nitrogen (N2), oxygen (O¬2), methane (CH4), carbon dioxide (CO2), ethane (C2H6), propane (C3H8), and n-butane (n-C4H10) were measured at 35 °C over a range of pressures using a Hiden Intelligent Gravimetric Analyzer, IGA. The more condensable gases (C2H6, CO2, C3H8, and n-C4H10) showed high solubility due to their high affinity to the polymer matrix. The permeation coefficients were determined for various gases at 35 °C and pressure difference of 5 bar via the constant-pressure/variable-volume method. The PIM-Trip-TB-2 film exhibited high performance for several high-impact applications, such as O2/N2, H2/N2 and H2/CH4. Also, physical aging for several gases was examined by measuring the permeability coefficients at different periods of time. Moreover, a series of mixed-gas permeation tests was performed using 2 vol.% n-C4H10/98 vol.% CH4 and the results showed similar transport characteristics to other microporous polymers with pores of less than 2 nm. The work performed in this research suggested that PIM-Trip-TB-2 is suitable for the separation of: (i) higher hydrocarbons from methane and (ii) small, non-condensable gases such as O2/N2 and H2/CH4.
Subjects/Keywords: Gas Separation; Polymeric membrane; vapor/gas seperation; Troges base; triptycene; Gas Sorption
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APA ·
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MLA ·
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APA (6th Edition):
Alhazmi, A. (2017). Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/623653
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Alhazmi, Abdulrahman. “Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation.” 2017. Thesis, King Abdullah University of Science and Technology. Accessed August 18, 2019.
http://hdl.handle.net/10754/623653.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Alhazmi, Abdulrahman. “Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation.” 2017. Web. 18 Aug 2019.
Vancouver:
Alhazmi A. Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2017. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/10754/623653.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Alhazmi A. Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation. [Thesis]. King Abdullah University of Science and Technology; 2017. Available from: http://hdl.handle.net/10754/623653
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Brno University of Technology
30.
Kalivoda, Josef.
Odstraňování plynných kontaminantů z atmosféry
.
Degree: 2010, Brno University of Technology
URL: http://hdl.handle.net/11012/13670
► Diplomová práce je zaměřena na odstraňování vybraných plynných kontaminantů z plynných směsí na expermentálním technologickém zařízení. Hlavní pozornost teoretické části je soustředěna na popis absorpčního…
(more)
▼ Diplomová práce je zaměřena na odstraňování vybraných plynných kontaminantů z plynných směsí na expermentálním technologickém zařízení. Hlavní pozornost teoretické části je soustředěna na popis absorpčního procesu, ustavení rovnováhy mezi kapalnou a plynnou fází. Experimentální část se soustředí absorpci oxidu uhličitého do deionizované vody na experimentálním zařízení. V závěru jsou pak diskutovány výsledky.; The Diploma thesis is devoted to the absorption of gases by the experimental
gas scrubber. The main attention of the theoretical part is focused on the description of absorption, kinetics and the equilibrium between
gas and liquid phase. Experimental part is concentrated on the absorption of carbon dioxide to deionized water in the experimental scrubber. Finally, experimental data are discussed.
Advisors/Committee Members: Svěrák, Tomáš (advisor).
Subjects/Keywords: Absorbce plynů;
separace plynů;
pračka plynů;
Gas absorption;
gas separation;
gas scrubber
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APA (6th Edition):
Kalivoda, J. (2010). Odstraňování plynných kontaminantů z atmosféry
. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/13670
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kalivoda, Josef. “Odstraňování plynných kontaminantů z atmosféry
.” 2010. Thesis, Brno University of Technology. Accessed August 18, 2019.
http://hdl.handle.net/11012/13670.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kalivoda, Josef. “Odstraňování plynných kontaminantů z atmosféry
.” 2010. Web. 18 Aug 2019.
Vancouver:
Kalivoda J. Odstraňování plynných kontaminantů z atmosféry
. [Internet] [Thesis]. Brno University of Technology; 2010. [cited 2019 Aug 18].
Available from: http://hdl.handle.net/11012/13670.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kalivoda J. Odstraňování plynných kontaminantů z atmosféry
. [Thesis]. Brno University of Technology; 2010. Available from: http://hdl.handle.net/11012/13670
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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. 
Open Access Theses and Dissertations