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1.
Kuncharam, Bhanu Vardhan.
Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming.
Degree: 2013, Texas Digital Library
URL: http://hdl.handle.net/1969; 
http://hdl.handle.net/2249.1/66739
► This research explores a novel application of catalytic membrane reactors for high- purity hydrogen extraction from bioethanol reforming. Conventional membrane systems employ hydrogen permselective materials…
(more)
▼ This research explores a novel application of
catalytic membrane reactors for high- purity hydrogen extraction from bioethanol reforming. Conventional
membrane systems employ hydrogen permselective materials such as palladium, polymer membranes, which present several material challenges including embrittlement, thermal degradation and poisoning by hydrocarbons when used for high-temperature hydrocarbon reforming. Thus, the present work is motivated by an interest in employing
reactor design concepts to alleviate our reliance upon permselective materials.
Catalytic membrane reactor with segregated reactant(s) is employed to demonstrate the hypothesis that high-purity hydrogen with competitive hydrogen recoveries can be achieved by manipulating the reaction and diffusion phenomena, and corresponding thermal gradients inside the
catalytic membrane, in the absence of any permselective materials. The hypothesis is demonstrated in two designs: (1) a single functional layer design for water-gas-shift
catalytic membrane reactor, and (2) a multi-layer design for bioethanol reforming. A two-dimensional model is developed to describe reaction and diffusion in the
catalytic membrane coupled with plug-flow equations in the retentate and permeate volumes using shell and tube architecture. Simulation results for a typical diesel reformate mixture (9 mol% CO, 3 mol% CO2, 28 mol% H2 and 15 mol% H2O) demonstrate that H2:CO permselectivities of 90:1 to > 200:1 with permeate hydrogen recoveries of 20% to 40% can be achieved through appropriate
catalytic membrane design. This single reaction simulation results are used to establish a clear rubric of design rules that are then used as a base for designing
catalytic membrane reactor for extraction of hydrogen from bioethanol (16 mol% ethanol). The two-dimensional
catalytic membrane reactor for bioethanol reforming is simulated, using a network of ethanol reforming reactions and a composite
iicatalyst with unique
catalytic layers active for one or more reactions. The isothermal simulation results show that an apparent H2:CO permselectivity of 100:1 with hydrogen recovery of 15% can be achieved at appropriate design and flow configuration. This model is extended to a non-isothermal design, which predicted a decrease in
membrane performance owing to endothermic reforming reaction. An autothermal design with an additional combustion catalyst layer to counteract the endothermic thermal gradients enhanced the non-isothermal
membrane performance. Experiments were conducted to validate the water-gas-shift
catalytic membrane reactor model using a gas permeation system; results qualitatively agree with the modeling results and quantitively with an error.
Advisors/Committee Members: Wilhite, Benjamin A (advisor).
Subjects/Keywords: catalytic membrane reactor
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APA (6th Edition):
Kuncharam, B. V. (2013). Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming. (Thesis). Texas Digital Library. Retrieved from http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66739
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):
Kuncharam, Bhanu Vardhan. “Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming.” 2013. Thesis, Texas Digital Library. Accessed January 16, 2021.
http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66739.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kuncharam, Bhanu Vardhan. “Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming.” 2013. Web. 16 Jan 2021.
Vancouver:
Kuncharam BV. Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming. [Internet] [Thesis]. Texas Digital Library; 2013. [cited 2021 Jan 16].
Available from: http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66739.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kuncharam BV. Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming. [Thesis]. Texas Digital Library; 2013. Available from: http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66739
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Augustine, Alexander Sullivan.
Supported Pd and Pd/Alloy Membranes for Water-Gas Shift Catalytic Membrane Reactors.
Degree: PhD, 2013, Worcester Polytechnic Institute
URL: etd-040813-171517
;
https://digitalcommons.wpi.edu/etd-dissertations/99
► This work describes the application of porous metal supported Pd-membranes to the water-gas shift catalytic membrane reactor in the context of its potential application to…
(more)
▼ This work describes the application of porous metal supported Pd-membranes to the water-gas shift
catalytic membrane reactor in the context of its potential application to the Integrated Gasification Combined Cycle (IGCC) process. The objective of this work was to develop a better understanding of Pd-
membrane fabrication techniques, water-gas shift
catalytic membrane reactor operation, and long-term behavior of the Pd-membranes under water-gas shift conditions. Thin (1.5 - 16 um) Pd-membranes were prepared by electroless deposition techniques on porous metal supports by previously developed methods. Pd-membranes were installed into stainless steel modules and utilized for mixed gas separation (H2/inert, H2/H2O, dry syngas, and wet syngas) at 350 - 450C and 14.5 atma to investigate boundary layer mass transfer resistance and surface inhibition. Pd-membranes were also installed into stainless steel modules with iron-chrome oxide catalyst and tested under water-gas shift conditions to investigate
membrane reactor operation in the high pressure (5.0 - 14.6 atma) and high temperature (300 - 500C) regime. After the establishment of appropriate operating conditions, long-term testing was conducted to determine the
membrane stability through He leak growth analysis and characterization by SEM and XRD. Pd and Pd/Au-alloy membranes were also investigated for their tolerance to 1 - 20 ppmv of H2S in syngas over extended periods at 400C and 14.0 atma. Water-gas shift
catalytic membrane reactor operating parameters were investigated with a focus on high pressure conditions such that high H2 recovery was possible without a sweep gas. With regard to the feed composition, it was desirable to operate at a low H2O/CO ratio for higher H2 recovery, but restrained by the potential for coke formation on the
membrane surface, which occurred at a H2O/CO ratio lower than 2.6 at 400C. The application of the Pd-membranes resulted in high CO conversion and H2 recovery for the high temperature (400 - 500C) water-gas shift reaction which then enabled high throughput. Operating at high temperature also resulted in higher
membrane permeance and less Pd-surface inhibition by CO and H2O. The water-gas shift
catalytic membrane reactor was capable of stable CO conversion and H2 recovery (96% and 88% respectively) at 400C over 900 hours of reaction testing, and 2,500 hours of overall testing of the Pd-
membrane. When 2 ppmv H2S was introduced into the
membrane reactor, a stable CO conversion of 96% and H2 recovery of 78% were observed over 230 hours. Furthermore, a Pd90Au10-
membrane was effective for mixed gas separation with up to 20 ppmv H2S present, achieving a stable H2 flux of 7.8 m3/m2-h with a moderate H2 recovery of 44%. The long-term stability under high pressure reaction conditions represents a breakthrough in Pd-
membrane utilization.
Advisors/Committee Members: Yi Hua Ma, Advisor, Robert W. Thompson, Committee Member, Richard D. Sisson, Jr., Committee Member, Nikolaos K. Kazantzis.
Subjects/Keywords: Pd membranes; hydrogen production; water-gas shift; catalytic membrane reactor
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APA (6th Edition):
Augustine, A. S. (2013). Supported Pd and Pd/Alloy Membranes for Water-Gas Shift Catalytic Membrane Reactors. (Doctoral Dissertation). Worcester Polytechnic Institute. Retrieved from etd-040813-171517 ; https://digitalcommons.wpi.edu/etd-dissertations/99
Chicago Manual of Style (16th Edition):
Augustine, Alexander Sullivan. “Supported Pd and Pd/Alloy Membranes for Water-Gas Shift Catalytic Membrane Reactors.” 2013. Doctoral Dissertation, Worcester Polytechnic Institute. Accessed January 16, 2021.
etd-040813-171517 ; https://digitalcommons.wpi.edu/etd-dissertations/99.
MLA Handbook (7th Edition):
Augustine, Alexander Sullivan. “Supported Pd and Pd/Alloy Membranes for Water-Gas Shift Catalytic Membrane Reactors.” 2013. Web. 16 Jan 2021.
Vancouver:
Augustine AS. Supported Pd and Pd/Alloy Membranes for Water-Gas Shift Catalytic Membrane Reactors. [Internet] [Doctoral dissertation]. Worcester Polytechnic Institute; 2013. [cited 2021 Jan 16].
Available from: etd-040813-171517 ; https://digitalcommons.wpi.edu/etd-dissertations/99.
Council of Science Editors:
Augustine AS. Supported Pd and Pd/Alloy Membranes for Water-Gas Shift Catalytic Membrane Reactors. [Doctoral Dissertation]. Worcester Polytechnic Institute; 2013. Available from: etd-040813-171517 ; https://digitalcommons.wpi.edu/etd-dissertations/99
University of Kentucky
3.
Islam, Mohammad Saiful.
MICROFILTRATION MEMBRANE PORE FUNCTIONALIZATION APPROACHES FOR CHLORO-ORGANIC REMEDIATION TO HEAVY METAL SORPTION.
Degree: 2020, University of Kentucky
URL: https://uknowledge.uky.edu/cme_etds/121
► Microfiltration polyvinylidene fluoride (PVDF) membranes have distinct advantage for open structure in terms of high internal surface area and ease of access in the pore…
(more)
▼ Microfiltration polyvinylidene fluoride (PVDF) membranes have distinct advantage for open structure in terms of high internal surface area and ease of access in the pore domain. Functionalization of PVDF membranes with different functional groups (-COOH, -OH, -SH) enables responsive (pH, temperature) properties to membrane, tuning of effective pore size, controlling permeate flux. PVDF microfiltration membrane functionalization with suitable responsive polymer such as poly acrylic acid (PAA) to incorporate carboxyl (-COOH) group enables further modification of functionalized PAA-PVDF membranes for different application ranging from catalysis, bio reactor to heavy metal sorption platform. As a catalytic reactor bed, this PAA-PVDF membranes are very desirable platform for in-situ synthesis of catalytic nanoparticles for conducting a wide range of reactions. As a bio reactor, PAA-PVDF membrane with a net charge have been used to electrostatically immobilize enzymes for conducting catalytic reactions. Functionalization of PVDF membrane also allow for the development of high capacity heavy metal sorbents by modifying existing functional groups (-COOH) to other functional groups (-SH) to adsorb heavy metal cations from contaminated water.
Hydrophilic polymers with carboxylic (-COOH) groups are studied in different functionalization processes especially in preparation of responsive (pH) membranes. To understand the role of membrane pore polymerization condition on the properties of functionalized membrane a systematic study has been conducted, specifically, the effects of polymerization on the membrane mass gain, water permeability, Pd-Fe nanoparticle (NP) loading, of pore functionalized polyvinylidene fluoride (PVDF) membranes. In this study, monomer (acrylic acid (AA)) and cross-linker (N, Nā²- methylene-bis (acrylamide)) concentrations were varied from 10 to 20 wt% of polymer solution and 0.5-2 mol% of monomer concentration, respectively. Results showed that responsive behavior of membrane could be tuned in terms of water permeability over a range of 270-1 Lm-2 h-1 bar-1, which is a function of water pH. The NP size on the membrane surface was found in the range of 16-23 nm. NP loading was found to vary from 0.21 to 0.94 mg per cm2 of membrane area depending on the variation of available carboxyl groups in membrane pore domain.
The NPs functionalized membranes were then tested as a platform for the degradation of 3,3',4,4',5-pentachlorobiphenyl (PCB 126) and understand the effect of NP loading of the rate of degradation of PCB 126. The observed batch reaction rate (Kobs) for PCB 126 degradation for per mg of catalyst loading was found 0.08-0.1 h-1. Degradation study in convective flow mode shows 98.6% PCB 126 is degraded at a residence time of 46.2 s. The corresponding surface area normalized reaction rate (Ksa) is found about two times higher than Ksa of batch degradation; suggesting elimination of the effect of diffusion resistance for degradation of PCB 126 in convective flow mode operation.
A layer-by-layer approach…
Subjects/Keywords: Microfiltration PVDF Membrane; Nanoparticles; Catalytic Membrane Reactor; Enzyme Immobilized Membrane; Thiol Functionalized Membrane; Hollow Nanoparticles; Membrane Science
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APA (6th Edition):
Islam, M. S. (2020). MICROFILTRATION MEMBRANE PORE FUNCTIONALIZATION APPROACHES FOR CHLORO-ORGANIC REMEDIATION TO HEAVY METAL SORPTION. (Doctoral Dissertation). University of Kentucky. Retrieved from https://uknowledge.uky.edu/cme_etds/121
Chicago Manual of Style (16th Edition):
Islam, Mohammad Saiful. “MICROFILTRATION MEMBRANE PORE FUNCTIONALIZATION APPROACHES FOR CHLORO-ORGANIC REMEDIATION TO HEAVY METAL SORPTION.” 2020. Doctoral Dissertation, University of Kentucky. Accessed January 16, 2021.
https://uknowledge.uky.edu/cme_etds/121.
MLA Handbook (7th Edition):
Islam, Mohammad Saiful. “MICROFILTRATION MEMBRANE PORE FUNCTIONALIZATION APPROACHES FOR CHLORO-ORGANIC REMEDIATION TO HEAVY METAL SORPTION.” 2020. Web. 16 Jan 2021.
Vancouver:
Islam MS. MICROFILTRATION MEMBRANE PORE FUNCTIONALIZATION APPROACHES FOR CHLORO-ORGANIC REMEDIATION TO HEAVY METAL SORPTION. [Internet] [Doctoral dissertation]. University of Kentucky; 2020. [cited 2021 Jan 16].
Available from: https://uknowledge.uky.edu/cme_etds/121.
Council of Science Editors:
Islam MS. MICROFILTRATION MEMBRANE PORE FUNCTIONALIZATION APPROACHES FOR CHLORO-ORGANIC REMEDIATION TO HEAVY METAL SORPTION. [Doctoral Dissertation]. University of Kentucky; 2020. Available from: https://uknowledge.uky.edu/cme_etds/121
Kansas State University
4.
Li, Yixiao.
Enabling
membrane reactor technology using polymeric membranes for efficient
energy and chemical production.
Degree: PhD, Department of Chemical
Engineering, 2018, Kansas State University
URL: http://hdl.handle.net/2097/39135
► Membrane reactor is a device that simultaneously carrying out reaction and membrane-based separation. The advantageous transport properties of the membranes can be employed to selectively…
(more)
▼ Membrane reactor is a device that simultaneously
carrying out reaction and
membrane-based separation. The
advantageous transport properties of the membranes can be employed
to selectively remove undesired products or by-products from the
reaction mixture, to break the thermodynamic barrier, and to
selectively supply the reactant. In this work,
membrane reactor
technology has been exploited with robust Hā selective polymeric
membranes in the process of hydrogenation and dehydrogenation.
A
state-of-the-art 3-phase
catalytic membrane contactor is utilized
in the processes of soybean hydrogenation and bio-oil
hydro-deoxygenation, where the
membrane functions as phase
contactor, Hāsupplier, and
catalytic support. Intrinsically skinned
asymmetric Polyetherimide (PEI) membranes demonstrated predominant
Hāpermeance and selectivity. By using the PEI
membrane in the
membrane contactor, soybean oil is partially hydrogenated
efficiently at relatively mild reaction conditions compared with a
conventional slurry
reactor. In the hydroprocessing of bio-oil
using the same system, the
membrane successfully removed water, an
undesired component from bio-oil by pervaporation.
The more
industrially feasible
membrane-assisted
reactor is studied in the
alkane dehydrogenation process. Viable polymeric materials and
their stability in elevated temperatures and organic environment
are examined. The blend polymeric material of MatrimidĀ® 5218 and
Polybenzimidazole (PBI) remained Hāpermeable and stable with the
presence of hydrocarbons, and displayed consistent selectivity of
H2/hydrocarbon, which indicated the feasibility of using the
material to fabricate thermally stable
membrane for separation.
The impact of
membrane-assisted
reactor is evaluated using finite
parameter process simulation in the model reaction of the
dehydrogenation of methylcyclohexane (MCH). By combining tested
catalyst performance, measured transport properties of the material
and hypothetical
membrane configuration, by using a
membrane
assisted packed-bed
reactor, the thermodynamic barrier of the
reaction is predicted to be broken by the removal of Hā. The
overall dehydrogenation conversion can be increased by up to 20%
beyond equilibrium.
The predicted results are justified by
preliminary experimental validation using intrinsically skinned
asymmetric Matrimid/PBI blend
membrane. The conversions at varied
temperatures partially exceeded equilibrium, indicating successful
removal of Hāby the blend
membrane as well as decent thermal
stability of the
membrane at elevated temperatures with the
presence of hydrocarbons.
The successful outcome of
membrane
contactor and
membrane-assisted
reactor using robust polymeric
membranes shows the effectiveness and efficiency of
membrane
reactors in varied application. The future work should be focusing
on two direction, to further develop durable and efficient
membranes with desired properties; and to improve the
reactor
system with better
catalytic performance, more precise control in
order to harvest preferable product and greater…
Advisors/Committee Members: Mary E. Rezac.
Subjects/Keywords: Catalytic
dehydrogenation; Three-phase
hydrogenation; Gas
separation membrane; Polymeric
membrane; Membrane
reactor; Thermally
stable polymeric material
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APA (6th Edition):
Li, Y. (2018). Enabling
membrane reactor technology using polymeric membranes for efficient
energy and chemical production. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/39135
Chicago Manual of Style (16th Edition):
Li, Yixiao. “Enabling
membrane reactor technology using polymeric membranes for efficient
energy and chemical production.” 2018. Doctoral Dissertation, Kansas State University. Accessed January 16, 2021.
http://hdl.handle.net/2097/39135.
MLA Handbook (7th Edition):
Li, Yixiao. “Enabling
membrane reactor technology using polymeric membranes for efficient
energy and chemical production.” 2018. Web. 16 Jan 2021.
Vancouver:
Li Y. Enabling
membrane reactor technology using polymeric membranes for efficient
energy and chemical production. [Internet] [Doctoral dissertation]. Kansas State University; 2018. [cited 2021 Jan 16].
Available from: http://hdl.handle.net/2097/39135.
Council of Science Editors:
Li Y. Enabling
membrane reactor technology using polymeric membranes for efficient
energy and chemical production. [Doctoral Dissertation]. Kansas State University; 2018. Available from: http://hdl.handle.net/2097/39135
5.
Ma, Liang-Chih.
Palladium/Alloy-based Catalytic Membrane Reactor Technology Options for Hydrogen Production: A Techno-Economic Performance Assessment Study.
Degree: PhD, 2016, Worcester Polytechnic Institute
URL: etd-012216-111004
;
https://digitalcommons.wpi.edu/etd-dissertations/535
► Hydrogen (H2) represents an energy carrier endowed with the potential to contribute to the design of a robust and reliable global energy system by complementing…
(more)
▼ Hydrogen (H2) represents an energy carrier endowed with the potential to contribute to the design of a robust and reliable global energy system by complementing electricity as well as liquid fuels use in an environmentally responsible manner provided that the pertinent H2 production technologies (conventional and new ones) can reach techno-economically attractive performance levels in the presence of irreducible (macroeconomic, fuel market, regulatory) uncertainty. Indeed, the role of H2 in the global energy economy is widely recognized as significant in light also of fast-growing demand in the petrochemical and chemical processing sector as well as future regulatory action on greenhouse gas emissions. Pd and Pd/Alloy-based
catalytic membrane reactor (CMR) modules potentially integrated into H2 production (HP-CMR) process systems offer a promising technical pathway towards H2 production with enhanced environmental performance in a carbon-constrained world. However, the lack of accumulated operating experience for HP-CMR plants on the commercial scale poses significant challenges. Therefore, any preliminary attempt to assess their economic viability is certainly justified.
A comprehensive techno-economic performance assessment framework has been developed for HP-CMRs with CO2 capture capabilities. A functional Net Present Value (NPV) model has been developed first to evaluate the economic viability of HP-CMRs. The plant/project value of HP-CMR is compared to other competing technology options such as traditional coal-gasification and methane steam reforming-based hydrogen production plants with and without CO2 capture. Sources of irreducible uncertainty (market and regulatory) as well as technology risks are explicitly recognized and the effect of these uncertainty drivers on the plantās/projectās value is taken into account using Monte-Carlo techniques. Therefore, more realistic distribution profiles of the plantās economic performance outcomes are generated rather than single-point value estimates. It is shown that future regulatory action on CO2 emissions could induce appealing NPV-distribution profiles for HP-CMRs in the presence of uncertainty and technology risks. Finally, the valuation assessment is complemented with a sensitivity analysis for different representative values of the discount rate that span a reasonable range associated with business and financing risks. It apparently indicates that creatively structured financing mechanisms leading to a reduction of the cost of capital/discount rate could induce more appealing economic performance outcomes and valuation profiles.
Furthermore, the proposed research work aims at the development of a methodological framework to assess the economic value of flexible alternatives in the design and operation of HP-CMR plants with carbon capture capabilities under the aforementioned sources of uncertainty. The main objective is to demonstrate the potential value enhancement associated with the long-term economic performance of flexible HP-CMR project investments by…
Advisors/Committee Members: Nikolaos K. Kazantzis, Advisor, Yi Hua Ma, Advisor, Susan C. Roberts, Department Head, Michael T. Timko, Committee Member, Huong N. Higgins, Committee Member, Bernardo Castro-Dominguez, Committee Member.
Subjects/Keywords: Carbon capture; Catalytic membrane reactor technology; Economic performance assessment under uncertainty; Economics & Finance/Energy/Environment; Flexibility in engineering design; Hydrogen production; Membrane reactor module; Monte-Carlo simulation; Palladium membrane lifetime
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APA (6th Edition):
Ma, L. (2016). Palladium/Alloy-based Catalytic Membrane Reactor Technology Options for Hydrogen Production: A Techno-Economic Performance Assessment Study. (Doctoral Dissertation). Worcester Polytechnic Institute. Retrieved from etd-012216-111004 ; https://digitalcommons.wpi.edu/etd-dissertations/535
Chicago Manual of Style (16th Edition):
Ma, Liang-Chih. “Palladium/Alloy-based Catalytic Membrane Reactor Technology Options for Hydrogen Production: A Techno-Economic Performance Assessment Study.” 2016. Doctoral Dissertation, Worcester Polytechnic Institute. Accessed January 16, 2021.
etd-012216-111004 ; https://digitalcommons.wpi.edu/etd-dissertations/535.
MLA Handbook (7th Edition):
Ma, Liang-Chih. “Palladium/Alloy-based Catalytic Membrane Reactor Technology Options for Hydrogen Production: A Techno-Economic Performance Assessment Study.” 2016. Web. 16 Jan 2021.
Vancouver:
Ma L. Palladium/Alloy-based Catalytic Membrane Reactor Technology Options for Hydrogen Production: A Techno-Economic Performance Assessment Study. [Internet] [Doctoral dissertation]. Worcester Polytechnic Institute; 2016. [cited 2021 Jan 16].
Available from: etd-012216-111004 ; https://digitalcommons.wpi.edu/etd-dissertations/535.
Council of Science Editors:
Ma L. Palladium/Alloy-based Catalytic Membrane Reactor Technology Options for Hydrogen Production: A Techno-Economic Performance Assessment Study. [Doctoral Dissertation]. Worcester Polytechnic Institute; 2016. Available from: etd-012216-111004 ; https://digitalcommons.wpi.edu/etd-dissertations/535
6.
Abusaloua, Ali.
RĆ©acteur catalytique membranaire pour le traitement dāeffluents liquides : Catalytic membrane reactor for waste water treatments.
Degree: Docteur es, GĆ©nie des procĆ©dĆ©s, 2010, Université Claude Bernard – Lyon I
URL: http://www.theses.fr/2010LYO10122
► Lāobjectif de cette Ć©tude portait sur la mise en Åuvre de rĆ©acteur catalytique membranaire pour une application dans le traitement dāeffluents liquides contaminĆ©s par des…
(more)
▼ Lāobjectif de cette Ć©tude portait sur la mise en Åuvre de rĆ©acteur catalytique membranaire pour une application dans le traitement dāeffluents liquides contaminĆ©s par des polluants organiques. Des phases catalytiques ont Ć©tĆ© dĆ©posĆ©es au sein des structures poreuses par diffĆ©rentes techniques afin de bien maĆ®triser la localisation des phases actives. Lāoptimisation des conditions opĆ©ratoires a ensuite Ć©tĆ© rĆ©alisĆ©e. Ces matĆ©riaux sont actifs pour lāoxydation de polluants prĆ©sents dans les effluents liquides et la configuration en mode contacteur a permis dāaccroĆ®tre lāefficacitĆ© et la stabilitĆ© des phases catalytiques pour ces rĆ©actions de dĆ©gradation grĆ¢ce Ć un meilleur contact entre les rĆ©actifs et les sites actifs.
The aim of this study was to evaluate catalytic membrane reactor for wet oxidation efficiencies of pollutants in waste water. In a first part, we have prepared catalytic membrane using several techniques of deposition in order to well control the position of the active phase in the porous structure. After optimisation of the experimental parameters, the study of pollutant degradation has showed that catalytic membrane reactor, in contactor configuration present highest efficiency than conventional reactor due to optimized contacts between reactants and active sites.
Advisors/Committee Members: Giroir-Fendler, Anne (thesis director), Fiaty, Koffi (thesis director).
Subjects/Keywords: Oxydation catalytique; OVH; RƩacteur membranaire; Catalyseurs mƩtaux supportƩs; Catalytic oxidation; CWAO; Membrane reactor; Supported metal catalysts
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APA (6th Edition):
Abusaloua, A. (2010). RĆ©acteur catalytique membranaire pour le traitement dāeffluents liquides : Catalytic membrane reactor for waste water treatments. (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2010LYO10122
Chicago Manual of Style (16th Edition):
Abusaloua, Ali. “RĆ©acteur catalytique membranaire pour le traitement dāeffluents liquides : Catalytic membrane reactor for waste water treatments.” 2010. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed January 16, 2021.
http://www.theses.fr/2010LYO10122.
MLA Handbook (7th Edition):
Abusaloua, Ali. “RĆ©acteur catalytique membranaire pour le traitement dāeffluents liquides : Catalytic membrane reactor for waste water treatments.” 2010. Web. 16 Jan 2021.
Vancouver:
Abusaloua A. RĆ©acteur catalytique membranaire pour le traitement dāeffluents liquides : Catalytic membrane reactor for waste water treatments. [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2010. [cited 2021 Jan 16].
Available from: http://www.theses.fr/2010LYO10122.
Council of Science Editors:
Abusaloua A. RĆ©acteur catalytique membranaire pour le traitement dāeffluents liquides : Catalytic membrane reactor for waste water treatments. [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2010. Available from: http://www.theses.fr/2010LYO10122
Colorado School of Mines
7.
Abu El Hawa, Hani W.
Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications.
Degree: PhD, Chemical and Biological Engineering, 2015, Colorado School of Mines
URL: http://hdl.handle.net/11124/20155
► In this thesis, the inert gas leak evolution problem in electroless-plated palladium-based composite membranes has been revisited. Palladium was doped with a higher melting point…
(more)
▼ In this thesis, the inert gas leak evolution problem in electroless-plated palladium-based composite membranes has been revisited. Palladium was doped with a higher melting point element such as ruthenium or platinum and the rate of increase of the nitrogen leak in the temperature range of 500-600 ĀŗC was determined. The results showed that doping Pd with Pt or Ru significantly reduces the leak growth rate compared to a pure Pd
membrane by almost one order of magnitude. The addition of Ru to Pd was sufficient to lower the leak growth rate, though the hydrogen permeance stability was not improved. The Pd-Pt alloy
membrane, despite having a lower hydrogen permeance, had a stable hydrogen flux at higher temperatures. The influence of high temperature annealing (> 640 ĀŗC) on the thermal stability of pure Pd composite membranes was also investigated in order to correlate between thermal stability and microstructural evolution. Pure Pd composite membranes were subjected to different high temperature annealing processes. It was found that employing such heat treatments improved the thermal stability of the membranes when operated at lower temperatures; evidenced by a suppression of the rate at which hydrogen selectivity towards nitrogen declined over time. SEM images of the microstructural evolution as a function of temperature revealed that porosity, which is typically present in as-deposited electroless plated films, is significantly reduced after heat treatment. Thermal stability was also evaluated in actual steam methane reforming (SMR) environments. Thin film (~5.0 Āµm thick) Pd-Ru and Pd-Au composite membranes were fabricated and used to carry out SMR over commercial Ni or Ru based catalysts at temperatures > 480 Ā°C and pressures up to 2.9 MPa. The conversions obtained (ā„ 80%) were significantly higher than the thermodynamic equilibrium predicted (< 35%) for the feed composition at these process conditions. The long term operation (> 500 hours) revealed the potential suitability of these Pd-alloys to be candidates for use in SMR
membrane reactors at temperature as high as 600 Ā°C. The permeate hydrogen flux and methane conversion were stable and the hydrogen permeate purity ranged from 93 to 99.7% depending on the operating conditions.
Advisors/Committee Members: Way, J. Douglas (advisor), Tong, Jianhua (committee member), Carreon, Moises A. (committee member), Paglieri, Stephen N. (committee member).
Subjects/Keywords: electroless plating; hydrogen separation; steam methane reforming; hydrogen production; catalytic membrane reactor; palladium-based composite membranes
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APA (6th Edition):
Abu El Hawa, H. W. (2015). Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/20155
Chicago Manual of Style (16th Edition):
Abu El Hawa, Hani W. “Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications.” 2015. Doctoral Dissertation, Colorado School of Mines. Accessed January 16, 2021.
http://hdl.handle.net/11124/20155.
MLA Handbook (7th Edition):
Abu El Hawa, Hani W. “Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications.” 2015. Web. 16 Jan 2021.
Vancouver:
Abu El Hawa HW. Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2015. [cited 2021 Jan 16].
Available from: http://hdl.handle.net/11124/20155.
Council of Science Editors:
Abu El Hawa HW. Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications. [Doctoral Dissertation]. Colorado School of Mines; 2015. Available from: http://hdl.handle.net/11124/20155
8.
Ji, P.
Novel H2 manufacturing routes. Simulation and thermodynamic analysis of membrane based processes.
Degree: 2004, Printpartners IPSKAMP
URL: http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c
;
urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c
;
urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c
;
http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c
► Nowadays hydrogen is gaining more and more attention mainly because it is generally regarded as an important future fuel. Although H2 can be produced from…
(more)
▼ Nowadays hydrogen is gaining more and more attention mainly because it is generally regarded as an important future fuel. Although H2 can be produced from a wide variety of resources using a range of different technologies, natural gas is generally preferred and will remain in the near future the major feedstock for the manufacture of H2.
Catalytic partial oxidation (CPO) is seen as a key technology for the conversion of methane in H2. The H2 produced by the conventional CPO process is mixed with other gases. For this fuel gas mixture rich in H2, the fuel cell does not convert at least 15% of the H2 that has been fed into it.
Membrane reactors can be used to produce pure H2, and then the utilization of the hydrogen produced can be enhanced, in the mean time, the process can be simplified. The
membrane reactors which have been studied, include the O2-
membrane CPO
reactor, the H2-
membrane CPO
reactor, the two-
membrane CPO
reactor (a CPO
reactor with O2 and H2 permeable
membrane), and the H2-
membrane water-gas-shift (WGS)
reactor. Three integrated processes around these
membrane reactors are proposed and compared with the conventional CPO process based on the results of a thermodynamic analysis. For performing a thermodynamic analysis, a wide range of data is required. To fulfil the data requirement, the simulation has to be accomplished, especially for the CPO and WGS reactors, without and with membranes. The simulation work is based on the kinetics of the reaction and
membrane permeation mechanisms. With the simulation models the profiles of temperature and molar fraction of different species along the
reactor' s axial coordinate have been simulated. The validity of the simulation work has been confirmed by the comparison of simulation results with the experimental data. Because of the key role played by the CPO reactors in each corresponding integrated processes, the production rates of useful products by different CPO reactors have been simulated and compared. The effect of each adjustable inlet condition on the output of the CPO reactors has been shown and discussed. On the basis of the simulation work and the knowledge of the characteristics of the conventional CPO
reactor and the
membrane CPO reactors, the thermodynamic analysis of the integrated conventional and
membrane CPO methane conversion processes has been carried out. The results have been used to design and optimise the processes around each CPO
reactor. The most efficient process has been identified. The resulting exergy balance for each process has been used to determine where and to what extent the exergy, that part of the energy contained that is available for useful work (such as electricity from a fuel cell), is dissipated. Also on the basis of the simulation work, the thermodynamic analysis of an integrated H2 production process with a fixed-geometry H2-
membrane reactor has been described. The effect of different inlet conditions on the overall exergy efficiency of the process has been shown and discussed. The simulation and thermodynamic analysis…
Advisors/Committee Members: De Swaan Arons, J..
Subjects/Keywords: thermodynamic analysis; fuel cell; membrane reactor; membrane; catalytic partial oxidation; simulation
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Ji, P. (2004). Novel H2 manufacturing routes. Simulation and thermodynamic analysis of membrane based processes. (Doctoral Dissertation). Printpartners IPSKAMP. Retrieved from http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c
Chicago Manual of Style (16th Edition):
Ji, P. “Novel H2 manufacturing routes. Simulation and thermodynamic analysis of membrane based processes.” 2004. Doctoral Dissertation, Printpartners IPSKAMP. Accessed January 16, 2021.
http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c.
MLA Handbook (7th Edition):
Ji, P. “Novel H2 manufacturing routes. Simulation and thermodynamic analysis of membrane based processes.” 2004. Web. 16 Jan 2021.
Vancouver:
Ji P. Novel H2 manufacturing routes. Simulation and thermodynamic analysis of membrane based processes. [Internet] [Doctoral dissertation]. Printpartners IPSKAMP; 2004. [cited 2021 Jan 16].
Available from: http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c.
Council of Science Editors:
Ji P. Novel H2 manufacturing routes. Simulation and thermodynamic analysis of membrane based processes. [Doctoral Dissertation]. Printpartners IPSKAMP; 2004. Available from: http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; urn:NBN:nl:ui:24-uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c ; http://resolver.tudelft.nl/uuid:efb5e4ac-61c4-44cc-963e-373551dbc35c
9.
THAWATCHAI MANEERUNG.
DEVELOPMENT OF CATALYTIC MEMBRANE REACTOR FOR PURE HYDROGEN PRODUCTION VIA CATALYTIC DECOMPOSITION OF METHANE.
Degree: 2012, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/34672
Subjects/Keywords: Catalytic membrane reactor; pure H2 production; LaNiO3 perovskite; Catalytic decomposition of methane; Pd-Ag alloy membrane; Inorganic hollow fiber
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APA (6th Edition):
MANEERUNG, T. (2012). DEVELOPMENT OF CATALYTIC MEMBRANE REACTOR FOR PURE HYDROGEN PRODUCTION VIA CATALYTIC DECOMPOSITION OF METHANE. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/34672
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):
MANEERUNG, THAWATCHAI. “DEVELOPMENT OF CATALYTIC MEMBRANE REACTOR FOR PURE HYDROGEN PRODUCTION VIA CATALYTIC DECOMPOSITION OF METHANE.” 2012. Thesis, National University of Singapore. Accessed January 16, 2021.
http://scholarbank.nus.edu.sg/handle/10635/34672.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
MANEERUNG, THAWATCHAI. “DEVELOPMENT OF CATALYTIC MEMBRANE REACTOR FOR PURE HYDROGEN PRODUCTION VIA CATALYTIC DECOMPOSITION OF METHANE.” 2012. Web. 16 Jan 2021.
Vancouver:
MANEERUNG T. DEVELOPMENT OF CATALYTIC MEMBRANE REACTOR FOR PURE HYDROGEN PRODUCTION VIA CATALYTIC DECOMPOSITION OF METHANE. [Internet] [Thesis]. National University of Singapore; 2012. [cited 2021 Jan 16].
Available from: http://scholarbank.nus.edu.sg/handle/10635/34672.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
MANEERUNG T. DEVELOPMENT OF CATALYTIC MEMBRANE REACTOR FOR PURE HYDROGEN PRODUCTION VIA CATALYTIC DECOMPOSITION OF METHANE. [Thesis]. National University of Singapore; 2012. Available from: http://scholarbank.nus.edu.sg/handle/10635/34672
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Robert Gordon University
10.
Umoh, Reuben Mfon.
Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor.
Degree: PhD, 2009, Robert Gordon University
URL: http://hdl.handle.net/10059/2117
► In this work, inorganic membranes with highly dispersed metallic catalysts on macroporous titania-washcoated alumina supports were produced, characterized and tested in a catalytic membrane reactor.…
(more)
▼ In this work, inorganic membranes with highly dispersed metallic catalysts on macroporous titania-washcoated alumina supports were produced, characterized and tested in a catalytic membrane reactor. The reactor, operated as a contactor in the forced pore-flow-through mode, was used for the conversion of synthesis gas (H2 + CO) into mixed alcohols and hydrocarbons via the Fischer-Tropsch synthesis. Carbon monoxide conversions of 78% and 90% at near atmospheric pressure (300kPa) and 493K were recorded over cobalt and bimetallic Co-Mn membranes respectively. The membranes also allowed for the conversion of carbon dioxide, thus eliminating the need for a CO2 separation interphase between synthesis gas production and Fischer-Tropsch synthesis. Catalytic tests conducted with the membrane reactor with different operating conditions (of temperature, pressure and feed flow rate) on cobalt-based membranes gave very high selectivity to specific products, mostly higher alcohols (C2 ā C8) and paraffins within the gasoline range, thereby making superfluous any further upgrading of products to fuel grade other than simple dehydration. Manganese-promoted cobalt membranes were found not only to give better Fischer-Tropsch activity, but also to promote isomerization of paraffins, which is good for boosting the octane number of the products, with the presence of higher alcohols improving the energy density. The membrane reactor concept also enhanced the ability of cobalt to catalyze synthesis gas conversions, giving an activation energy Ea of 59.5 kJ/mol.K compared with 86.9 ā 170 kJ/mol.K recorded in other reactors. Efficient heat transfer was observed because of the open channel morphology of the porous membranes. A simplified mechanism for both alcohol and hydrocarbon production based on hydroxycarbene formation was proposed to explain both the stoichiometric reactions formulated and the observed product distribution pattern.
Subjects/Keywords: 661; Inorganic membranes; Hydrocarbons; Fischer-Tropsch synthesis; Catalytic membrane reactor
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APA ·
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APA (6th Edition):
Umoh, R. M. (2009). Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor. (Doctoral Dissertation). Robert Gordon University. Retrieved from http://hdl.handle.net/10059/2117
Chicago Manual of Style (16th Edition):
Umoh, Reuben Mfon. “Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor.” 2009. Doctoral Dissertation, Robert Gordon University. Accessed January 16, 2021.
http://hdl.handle.net/10059/2117.
MLA Handbook (7th Edition):
Umoh, Reuben Mfon. “Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor.” 2009. Web. 16 Jan 2021.
Vancouver:
Umoh RM. Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor. [Internet] [Doctoral dissertation]. Robert Gordon University; 2009. [cited 2021 Jan 16].
Available from: http://hdl.handle.net/10059/2117.
Council of Science Editors:
Umoh RM. Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor. [Doctoral Dissertation]. Robert Gordon University; 2009. Available from: http://hdl.handle.net/10059/2117
11.
SUN MING.
PURIFICATION AND CATALYTIC REFORMING OF METHANE ? A NEW INSIGHT INTO CARBON ADSORBENT AND MEIC MEMBRANE REACTOR.
Degree: 2012, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/36372
Subjects/Keywords: carbon adsorbent; membrane reactor; catalytic reforming; POM; desulfurization; mixed conduction
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APA ·
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APA (6th Edition):
MING, S. (2012). PURIFICATION AND CATALYTIC REFORMING OF METHANE ? A NEW INSIGHT INTO CARBON ADSORBENT AND MEIC MEMBRANE REACTOR. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/36372
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):
MING, SUN. “PURIFICATION AND CATALYTIC REFORMING OF METHANE ? A NEW INSIGHT INTO CARBON ADSORBENT AND MEIC MEMBRANE REACTOR.” 2012. Thesis, National University of Singapore. Accessed January 16, 2021.
http://scholarbank.nus.edu.sg/handle/10635/36372.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
MING, SUN. “PURIFICATION AND CATALYTIC REFORMING OF METHANE ? A NEW INSIGHT INTO CARBON ADSORBENT AND MEIC MEMBRANE REACTOR.” 2012. Web. 16 Jan 2021.
Vancouver:
MING S. PURIFICATION AND CATALYTIC REFORMING OF METHANE ? A NEW INSIGHT INTO CARBON ADSORBENT AND MEIC MEMBRANE REACTOR. [Internet] [Thesis]. National University of Singapore; 2012. [cited 2021 Jan 16].
Available from: http://scholarbank.nus.edu.sg/handle/10635/36372.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
MING S. PURIFICATION AND CATALYTIC REFORMING OF METHANE ? A NEW INSIGHT INTO CARBON ADSORBENT AND MEIC MEMBRANE REACTOR. [Thesis]. National University of Singapore; 2012. Available from: http://scholarbank.nus.edu.sg/handle/10635/36372
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
12.
Yun, Thomas.
Fuel reformation and hydrogen generation in variable volume membrane batch reactors with dynamic liquid fuel introduction.
Degree: PhD, Mechanical Engineering, 2015, Georgia Tech
URL: http://hdl.handle.net/1853/53550
► In recent years, the need for high performance power sources has increased dramatically with the proliferation of ultra-compact electronic systems for mobile communication, man-portable and…
(more)
▼ In recent years, the need for high performance power sources has increased dramatically with the proliferation of ultra-compact electronic systems for mobile communication, man-portable and versatile military equipment, and electric vehicles. Volume- and mass- based power density are two of the most important performance metrics for portable power sources, including hydrogen generating fuel reforming systems (onboard) for hydrogen fuel cells. Two innovative multifunctional
reactor concepts, CO2/H2 Active
Membrane Piston (CHAMP) and Direct Droplet Impingement
Reactor (DDIR), are combined for the purpose of hydrogen generating fuel reforming system (onboard) for fuel cells. In CHAMP-DDIR, a liquid fuel mixture is pulse-injected onto the heated catalyst surface for rapid flash volatilization and on-the-spot reaction, and a hydrogen selective
membrane is collocated with the catalyst to reduce the diffusion distance for hydrogen transport from the reaction zone to the separation site. CHAMP-DDIR allows dynamic variation of the
reactor volume to optimally control the residence time and
reactor conditions, such as pressure and temperature, thus improving both the reaction and separation processes.
A comprehensive CHAMP-DDIR model, which couples key physical processes including 1)
catalytic chemical reactions, 2) hydrogen separation/permeation at
membrane, 3) liquid fuel evaporation, and 4) heat and mass transport, has been developed to investigate the behavior of this novel
reactor system, aiming at maximizing the volumetric power density of hydrogen generation from methanol/water liquid fuel. The relationships between system design parameters and the rate-limiting process(es), i.e., reaction, permeation, and transport, which govern
reactor output, have identified. Experimental characterization of the prototype
reactor has been performed for laboratory demonstration of the concept and model validation. Both model predictions and experiments successfully demonstrate the unique practical performance improvements of CHAMP-DDIR through combining time-modulated fuel introduction and the active change of
reactor volume/pressure.
This work has led to a number of fundamental insights and development of engineering guidelines for design and operation of CHAMP-DDIR class of reactors, which can be extended to a broad range of fuels and diverse practical applications.
Advisors/Committee Members: Fedorov, Andrei G. (advisor), Jones, Christopher (committee member), Lieuwen, Timothy (committee member), Genzale, Caroline (committee member), Kottke, Peter A. (committee member).
Subjects/Keywords: Hydrogen; Reformation; Reactor; Droplet evaporation; Catalytic reaction; Membrane
…0.5 šš membrane with ideal reactor model. All simulations are for
the fixed volume reactor… …Continuous-Flow Reactor
CHAMP : CO2 H2 Active Membrane Piston
DDIR : Direct Droplet Impingement… …Reactor
PBMR: Packed Bed Membrane Reactor
MD : Methanol Decomposition
MSR : Methanol Steam… …Active Membrane Piston (CHAMP) and Direct Droplet Impingement Reactor
(DDIR)… …separation in a batch membrane reactor,
under changing thermodynamic conditions. Theoretical…
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APA ·
Chicago ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yun, T. (2015). Fuel reformation and hydrogen generation in variable volume membrane batch reactors with dynamic liquid fuel introduction. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/53550
Chicago Manual of Style (16th Edition):
Yun, Thomas. “Fuel reformation and hydrogen generation in variable volume membrane batch reactors with dynamic liquid fuel introduction.” 2015. Doctoral Dissertation, Georgia Tech. Accessed January 16, 2021.
http://hdl.handle.net/1853/53550.
MLA Handbook (7th Edition):
Yun, Thomas. “Fuel reformation and hydrogen generation in variable volume membrane batch reactors with dynamic liquid fuel introduction.” 2015. Web. 16 Jan 2021.
Vancouver:
Yun T. Fuel reformation and hydrogen generation in variable volume membrane batch reactors with dynamic liquid fuel introduction. [Internet] [Doctoral dissertation]. Georgia Tech; 2015. [cited 2021 Jan 16].
Available from: http://hdl.handle.net/1853/53550.
Council of Science Editors:
Yun T. Fuel reformation and hydrogen generation in variable volume membrane batch reactors with dynamic liquid fuel introduction. [Doctoral Dissertation]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/53550
University of Kentucky
13.
Tee, Yit-Hong.
DESTRUCTION STUDY OF TOXIC CHLORINATED ORGANICS USING BIMETALLIC NANOPARTICLES AND MEMBRANE REACTOR: SYNTHESIS, CHARACTERIZATION, AND MODELING.
Degree: 2006, University of Kentucky
URL: https://uknowledge.uky.edu/gradschool_theses/420
► Zero-valent metals such as bulk iron and zinc are known to dechlorinate toxicorganic compounds. Enhancement in reaction rates has been achieved through bimetallicnanosized particles such…
(more)
▼ Zero-valent metals such as bulk iron and zinc are known to dechlorinate toxicorganic compounds. Enhancement in reaction rates has been achieved through bimetallicnanosized particles such as nickel/iron (Ni/Fe) and palladium/iron (Pd/Fe). Batchdegradation of model compounds, trichlroethylene (TCE) and 2,2'-dichlorobiphenyls(DCB), were conducted using bimetallic Ni/Fe and Pd/Fe nanoparticles. Completedegradation of TCE and DCB is achieved at room temperature. Zero-valent iron, as themajor element, undergoes corrosion to provide hydrogen and electrons for the reductivecatalytic hydrodechlorination reaction. The second dopant metals of nickel and palladium(in nanoscale) act as catalyst for hydrogenation through metal hydride formation thatproduces completely dechlorinated final product. Different compositions of bimetallicNi/Fe and Pd/Fe nanoparticles were synthesized and their reactivity was characterized interms of reaction rate constants, hydrogen generation through iron corrosion, andproducts formation. The observed TCE degradation rate constant was two orders ofmagnitude higher than the bulk iron and nanoiron, indicating that the bimetallicnanoparticles are better materials compared to the monometallic iron systems. Longevitystudy through repeated cycle experiments showed minimum loss of activity. The surfacearea-normalized rate constant was found to have a strong correlation with the hydrogengeneration by iron corrosion reaction. A mathematical model was derived thatincorporates the reaction and Langmuirian-type sorption terms to estimate the intrinsicreaction rate constant and rate-limiting step in the degradation process. Bimetallicnanoparticles were also immobilized into the chitosan matrix for the synthesis of ananocomposite membrane reactor to achieve membrane-phase destruction of chlorinatedorganics under convective flow condition. Formation of uniformly distributed nanosizedparticles is confirmed by high resolution transmission electron microscopy. Themembrane-phase degradation results demonstrated similar trends with the previoussolution phase analysis with the observed enhanced reaction rates. The advantage of themembrane system is its ability to prevent the agglomeration of the nanoparticles in themembrane matrix, to minimize the loss of precious metals into the bulk solution phase,and to prevent the formation of precipitated Fe(III) hydroxide. These are due to thechelating effect of the amine and hydroxyl functional groups in the chitosan backbones.
Subjects/Keywords: Bimetallic Nanoparticles; Chlorinated Organics; Catalytic Hydrodechlorination; Langmuirian - Type Sorption Isotherm; Nanocomposite Membrane Reactor
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APA (6th Edition):
Tee, Y. (2006). DESTRUCTION STUDY OF TOXIC CHLORINATED ORGANICS USING BIMETALLIC NANOPARTICLES AND MEMBRANE REACTOR: SYNTHESIS, CHARACTERIZATION, AND MODELING. (Masters Thesis). University of Kentucky. Retrieved from https://uknowledge.uky.edu/gradschool_theses/420
Chicago Manual of Style (16th Edition):
Tee, Yit-Hong. “DESTRUCTION STUDY OF TOXIC CHLORINATED ORGANICS USING BIMETALLIC NANOPARTICLES AND MEMBRANE REACTOR: SYNTHESIS, CHARACTERIZATION, AND MODELING.” 2006. Masters Thesis, University of Kentucky. Accessed January 16, 2021.
https://uknowledge.uky.edu/gradschool_theses/420.
MLA Handbook (7th Edition):
Tee, Yit-Hong. “DESTRUCTION STUDY OF TOXIC CHLORINATED ORGANICS USING BIMETALLIC NANOPARTICLES AND MEMBRANE REACTOR: SYNTHESIS, CHARACTERIZATION, AND MODELING.” 2006. Web. 16 Jan 2021.
Vancouver:
Tee Y. DESTRUCTION STUDY OF TOXIC CHLORINATED ORGANICS USING BIMETALLIC NANOPARTICLES AND MEMBRANE REACTOR: SYNTHESIS, CHARACTERIZATION, AND MODELING. [Internet] [Masters thesis]. University of Kentucky; 2006. [cited 2021 Jan 16].
Available from: https://uknowledge.uky.edu/gradschool_theses/420.
Council of Science Editors:
Tee Y. DESTRUCTION STUDY OF TOXIC CHLORINATED ORGANICS USING BIMETALLIC NANOPARTICLES AND MEMBRANE REACTOR: SYNTHESIS, CHARACTERIZATION, AND MODELING. [Masters Thesis]. University of Kentucky; 2006. Available from: https://uknowledge.uky.edu/gradschool_theses/420
14.
YIN XIONG.
Fabrication of tubular ceramic oxygen-electrolyte membrane reactor.
Degree: 2007, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/23077
Subjects/Keywords: ceramic-polymer blend; ceramic oxygen-electrolyte membrane; asymmetric tubular membrane; membrane reactor; catalytic partial oxidation of methane
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APA (6th Edition):
XIONG, Y. (2007). Fabrication of tubular ceramic oxygen-electrolyte membrane reactor. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/23077
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):
XIONG, YIN. “Fabrication of tubular ceramic oxygen-electrolyte membrane reactor.” 2007. Thesis, National University of Singapore. Accessed January 16, 2021.
http://scholarbank.nus.edu.sg/handle/10635/23077.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
XIONG, YIN. “Fabrication of tubular ceramic oxygen-electrolyte membrane reactor.” 2007. Web. 16 Jan 2021.
Vancouver:
XIONG Y. Fabrication of tubular ceramic oxygen-electrolyte membrane reactor. [Internet] [Thesis]. National University of Singapore; 2007. [cited 2021 Jan 16].
Available from: http://scholarbank.nus.edu.sg/handle/10635/23077.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
XIONG Y. Fabrication of tubular ceramic oxygen-electrolyte membrane reactor. [Thesis]. National University of Singapore; 2007. Available from: http://scholarbank.nus.edu.sg/handle/10635/23077
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
15.
Kuncharam, Bhanu Vardhan.
Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming.
Degree: PhD, Chemical Engineering, 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/151846
► This research explores a novel application of catalytic membrane reactors for high- purity hydrogen extraction from bioethanol reforming. Conventional membrane systems employ hydrogen permselective materials…
(more)
▼ This research explores a novel application of
catalytic membrane reactors for high- purity hydrogen extraction from bioethanol reforming. Conventional
membrane systems employ hydrogen permselective materials such as palladium, polymer membranes, which present several material challenges including embrittlement, thermal degradation and poisoning by hydrocarbons when used for high-temperature hydrocarbon reforming. Thus, the present work is motivated by an interest in employing
reactor design concepts to alleviate our reliance upon permselective materials.
Catalytic membrane reactor with segregated reactant(s) is employed to demonstrate the hypothesis that high-purity hydrogen with competitive hydrogen recoveries can be achieved by manipulating the reaction and diffusion phenomena, and corresponding thermal gradients inside the
catalytic membrane, in the absence of any permselective materials. The hypothesis is demonstrated in two designs: (1) a single functional layer design for water-gas-shift
catalytic membrane reactor, and (2) a multi-layer design for bioethanol reforming. A two-dimensional model is developed to describe reaction and diffusion in the
catalytic membrane coupled with plug-flow equations in the retentate and permeate volumes using shell and tube architecture. Simulation results for a typical diesel reformate mixture (9 mol% CO, 3 mol% CO2, 28 mol% H2 and 15 mol% H2O) demonstrate that H2:CO permselectivities of 90:1 to > 200:1 with permeate hydrogen recoveries of 20% to 40% can be achieved through appropriate
catalytic membrane design. This single reaction simulation results are used to establish a clear rubric of design rules that are then used as a base for designing
catalytic membrane reactor for extraction of hydrogen from bioethanol (16 mol% ethanol). The two-dimensional
catalytic membrane reactor for bioethanol reforming is simulated, using a network of ethanol reforming reactions and a composite
iicatalyst with unique
catalytic layers active for one or more reactions. The isothermal simulation results show that an apparent H2:CO permselectivity of 100:1 with hydrogen recovery of 15% can be achieved at appropriate design and flow configuration. This model is extended to a non-isothermal design, which predicted a decrease in
membrane performance owing to endothermic reforming reaction. An autothermal design with an additional combustion catalyst layer to counteract the endothermic thermal gradients enhanced the non-isothermal
membrane performance. Experiments were conducted to validate the water-gas-shift
catalytic membrane reactor model using a gas permeation system; results qualitatively agree with the modeling results and quantitively with an error.
Advisors/Committee Members: Wilhite, Benjamin A (advisor), Holtzapple, Mark (committee member), Balbuena, Perla (committee member), Grunlan, Jaime (committee member).
Subjects/Keywords: catalytic membrane reactor; gas separation; mathematical modeling; reactor analysis; hydrogen purification; membranes
…1.8.1 Packed bed membrane reactor (PBMR) . . . .
1.8.2 Catalytic membrane reactor… …40
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56
2. DESIGN OF WATER-GAS-SHIFT CATALYTIC MEMBRANE REACTOR . .
58
2.1… …DEMONSTRATION OF WATER-GAS-SHIFT CATALYTIC
MEMBRANE REACTOR MODEL… …104
4. DESIGN OF COMPOSITE CATALYTIC MEMBRANE REACTOR FOR HYDROGEN EXTRACTION FROM… …4.4.1 Catalytic membrane reactor . . . . . . . . . . . .
4.4.2 Packed bed reactor (PBR…
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kuncharam, B. V. (2013). Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151846
Chicago Manual of Style (16th Edition):
Kuncharam, Bhanu Vardhan. “Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming.” 2013. Doctoral Dissertation, Texas A&M University. Accessed January 16, 2021.
http://hdl.handle.net/1969.1/151846.
MLA Handbook (7th Edition):
Kuncharam, Bhanu Vardhan. “Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming.” 2013. Web. 16 Jan 2021.
Vancouver:
Kuncharam BV. Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Jan 16].
Available from: http://hdl.handle.net/1969.1/151846.
Council of Science Editors:
Kuncharam BV. Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151846
16.
SAW ENG TOON.
DEVELOPMENT OF NI-BASED CATALYTIC, CERIA NANO-STRUCTURES AND CATALYTIC MEMBRANE REACTOR OF HIGH TEMPERATURE WATER GAS SHIFT REACTION.
Degree: 2014, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/120084
Subjects/Keywords: High temperature water gas shift reaction; Nickel-copper alloy; Ceria nanostructure; Pd-membrane; Catalytic membrane reactor
Record Details
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Share »
Record Details
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Cite
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
TOON, S. E. (2014). DEVELOPMENT OF NI-BASED CATALYTIC, CERIA NANO-STRUCTURES AND CATALYTIC MEMBRANE REACTOR OF HIGH TEMPERATURE WATER GAS SHIFT REACTION. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/120084
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):
TOON, SAW ENG. “DEVELOPMENT OF NI-BASED CATALYTIC, CERIA NANO-STRUCTURES AND CATALYTIC MEMBRANE REACTOR OF HIGH TEMPERATURE WATER GAS SHIFT REACTION.” 2014. Thesis, National University of Singapore. Accessed January 16, 2021.
http://scholarbank.nus.edu.sg/handle/10635/120084.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
TOON, SAW ENG. “DEVELOPMENT OF NI-BASED CATALYTIC, CERIA NANO-STRUCTURES AND CATALYTIC MEMBRANE REACTOR OF HIGH TEMPERATURE WATER GAS SHIFT REACTION.” 2014. Web. 16 Jan 2021.
Vancouver:
TOON SE. DEVELOPMENT OF NI-BASED CATALYTIC, CERIA NANO-STRUCTURES AND CATALYTIC MEMBRANE REACTOR OF HIGH TEMPERATURE WATER GAS SHIFT REACTION. [Internet] [Thesis]. National University of Singapore; 2014. [cited 2021 Jan 16].
Available from: http://scholarbank.nus.edu.sg/handle/10635/120084.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
TOON SE. DEVELOPMENT OF NI-BASED CATALYTIC, CERIA NANO-STRUCTURES AND CATALYTIC MEMBRANE REACTOR OF HIGH TEMPERATURE WATER GAS SHIFT REACTION. [Thesis]. National University of Singapore; 2014. Available from: http://scholarbank.nus.edu.sg/handle/10635/120084
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
. 
Open Access Theses and Dissertations
