subject:(Hydrogen recovery)

Delft University of Technology

1. Rosas Saad, Jorge A (author). Tungsten Recrystallization Behavior Under Steady and Transient Hydrogen Plasma Loading.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:08a173ca-af8e-479e-93c0-bd3c17068802

► Because of its extraordinary material properties, like its high melting point and thermal stress resistance, low erosion and swelling rate, and high radiation damage resistance,… (more)

▼ Because of its extraordinary material properties, like its high melting point and thermal stress resistance, low erosion and swelling rate, and high radiation damage resistance, highly deformed pure tungsten has been chosen as the plasma facing surface material for the ITER reactor divertor. The study of tungsten’s recrystallization behavior and damage response during operation conditions is thus important because the divertor will have to withstand high heat fluxes and temperatures during service which induce recrystallization. This phenomena alters the microstructure of the material, inducing degradation in its properties, like loss in mechanical strength and embrittlement making it prone to large plastic deformation, surface roughening, crack networks formation and propagation. Understanding this behavior under the ITER reactor operation circumstances is paramount for the success of the reactor. The aim of this project was to test regimes simulating steady state operation and high frequency and temperature transient pulses called ELMs (Edge Localized Modes) striking the divertor. Recent research has shown that the degradation and behavior of tungsten under these transient conditions does not consistently follow the expected parameters characterized in the literature. According to it, recrystallization, grain growth, and crack formation seem to be suppressed by the plasma loading under these regimes, thus a new understanding of the material behavior for these circumstances must be developed. To do this, ITER grade tungsten samples were subjected to a hydrogen plasma beam at DIFFER’s Magnum-PSI with temperatures at the strike point ranging from ~1000 to ~1500 °C and high frequency pulses that increased the surface temperature by ~200 to ~300 °C above the steady state temperature. The surface thermal shock response to the plasma pulses was characterized by means of infrared and pyrometer readings at the samples’ surface during exposure. Temperature and power density calculations were correlated with identified damage morphologies on the targets and a damage map for the experiments was elaborated, which showed that the most severe damage (cracks and crack networks) begin to appear in the range of the measured recrystallization temperature of the samples, which was lower than expected. Using Vickers hardness, the recovery and recrystallization kinetics of the material were characterized by means of logarithmic decay and a modified version of JMAK recrystallization kinetics that includes an incubation time for the onset of recrystallization. Recrystallization kinetics were found to accelerate as the hydrogen exposure progresses, thus yielding lower effective activation energies for recrystallization when comparing furnace one hour exposures, plasma one hour exposures, and plasma four hour exposures. This pointed to the presence of hydrogen actively reducing the activation energy for self-diffusion. Simulations of hydrogen diffusion were performed to test this hypothesis, and even though the total… Advisors/Committee Members: Sietsma, Jilt (mentor), Morgan, Thomas (graduation committee), Sluiter, Marcel (graduation committee), Bottger, Amarante (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Tungsten; Recrystallization; Fusion; Hydrogen; Plasma; JMAK; Recrystallization Kinetics; Recovery Kinetics

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APA (6^th Edition):

Rosas Saad, J. A. (. (2018). Tungsten Recrystallization Behavior Under Steady and Transient Hydrogen Plasma Loading. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:08a173ca-af8e-479e-93c0-bd3c17068802

Chicago Manual of Style (16^th Edition):

Rosas Saad, Jorge A (author). “Tungsten Recrystallization Behavior Under Steady and Transient Hydrogen Plasma Loading.” 2018. Masters Thesis, Delft University of Technology. Accessed April 15, 2021. http://resolver.tudelft.nl/uuid:08a173ca-af8e-479e-93c0-bd3c17068802.

MLA Handbook (7^th Edition):

Rosas Saad, Jorge A (author). “Tungsten Recrystallization Behavior Under Steady and Transient Hydrogen Plasma Loading.” 2018. Web. 15 Apr 2021.

Vancouver:

Rosas Saad JA(. Tungsten Recrystallization Behavior Under Steady and Transient Hydrogen Plasma Loading. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Apr 15]. Available from: http://resolver.tudelft.nl/uuid:08a173ca-af8e-479e-93c0-bd3c17068802.

Council of Science Editors:

Rosas Saad JA(. Tungsten Recrystallization Behavior Under Steady and Transient Hydrogen Plasma Loading. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:08a173ca-af8e-479e-93c0-bd3c17068802

University of Ontario Institute of Technology

2. Ishaq, Haris. Thermal management of the thermochemical Cu-Cl cycle linked with industrial processes for hydrogen production.

Degree: 2018, University of Ontario Institute of Technology

URL: http://hdl.handle.net/10155/925

► This thesis study develops, analyzes and evaluates three integrated systems using process heats available in industrial applications for hydrogen production via copper-chlorine (Cu-Cl) cycle. The… (more)

Subjects/Keywords: Hydrogen production; Thermal management; Energy conversion; Cu-Cl cycle; Heat recovery

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APA (6^th Edition):

Ishaq, H. (2018). Thermal management of the thermochemical Cu-Cl cycle linked with industrial processes for hydrogen production. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/925

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ishaq, Haris. “Thermal management of the thermochemical Cu-Cl cycle linked with industrial processes for hydrogen production.” 2018. Thesis, University of Ontario Institute of Technology. Accessed April 15, 2021. http://hdl.handle.net/10155/925.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ishaq, Haris. “Thermal management of the thermochemical Cu-Cl cycle linked with industrial processes for hydrogen production.” 2018. Web. 15 Apr 2021.

Vancouver:

Ishaq H. Thermal management of the thermochemical Cu-Cl cycle linked with industrial processes for hydrogen production. [Internet] [Thesis]. University of Ontario Institute of Technology; 2018. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/10155/925.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ishaq H. Thermal management of the thermochemical Cu-Cl cycle linked with industrial processes for hydrogen production. [Thesis]. University of Ontario Institute of Technology; 2018. Available from: http://hdl.handle.net/10155/925

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University

3. Reddy, Sharath. Energy and Exergy Analysis of Chemical Looping Systems for Hydrogen and Sulfur Recovery.

Degree: MS, Chemical Engineering, 2019, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1556069387739902

► Fossil fuel power plants often generate sulfur species such as hydrogen sulfide or sulfur dioxide due to the sulfur content of the raw feedstocks. To… (more)

Subjects/Keywords: Energy; Engineering; Sulfur recovery; Iron sulfide-based chemical looping; Hydrogen production; Exergy analysis; Energy analysis; Staged hydrogen separation

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APA (6^th Edition):

Reddy, S. (2019). Energy and Exergy Analysis of Chemical Looping Systems for Hydrogen and Sulfur Recovery. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1556069387739902

Chicago Manual of Style (16^th Edition):

Reddy, Sharath. “Energy and Exergy Analysis of Chemical Looping Systems for Hydrogen and Sulfur Recovery.” 2019. Masters Thesis, The Ohio State University. Accessed April 15, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556069387739902.

MLA Handbook (7^th Edition):

Reddy, Sharath. “Energy and Exergy Analysis of Chemical Looping Systems for Hydrogen and Sulfur Recovery.” 2019. Web. 15 Apr 2021.

Vancouver:

Reddy S. Energy and Exergy Analysis of Chemical Looping Systems for Hydrogen and Sulfur Recovery. [Internet] [Masters thesis]. The Ohio State University; 2019. [cited 2021 Apr 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1556069387739902.

Council of Science Editors:

Reddy S. Energy and Exergy Analysis of Chemical Looping Systems for Hydrogen and Sulfur Recovery. [Masters Thesis]. The Ohio State University; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1556069387739902

Penn State University

4. Ullery, Mark Linden. Screening and acclimation methods for accomplishing treatment and energy recovery from wastewater in microbial electrolysis cells.

Degree: 2014, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/22376

► Microbial electrolysis cells (MECs) are an emerging bioelectrochemical technology that can recover energy from organic matter in wastewater. In an MEC, a biological anode populated… (more)

▼ Microbial electrolysis cells (MECs) are an emerging bioelectrochemical technology that can recover energy from organic matter in wastewater. In an MEC, a biological anode populated with microbes, capable of oxidizing organic compounds and generating an electrical current, is paired with a conductive, hydrogen-evolving cathode. Wastewater composition and concentration can vary significantly between sources, which influences organic treatment, gas production, and current generation in MECs. Inexpensive, miniature MECs (5 mL) have been previously used to examine MEC performance with different industrial effluents, but they have not been compared with more widely used reactor designs. In this study, mini MECs and larger cube MECs (32 mL) were compared with industrial (IW), domestic (DW), fermentation (FE), and synthetic (AC) effluents to better understand how performance corresponds between these reactor designs. Before MEC treatment, the IW, DW, FE and AC samples contained 450-4500 mg/L of chemical oxygen demand (COD) and 230-800 mg/L of biological oxygen demand (BOD). 66-92% of COD was removed in MECs for all samples, with higher average current density observed with the AC and FE samples (2.25-6.72 A/m2), which were buffered, than the IW and DW samples (0.64-1.93 A/m2). COD removal and coulombic efficiency (CE) correlated well between mini and cube MECs. Total charge (normalized to the reactor liquid volume) and the rate of current generation were similar between mini and cube MECs fed well-buffered samples (AC and FE), but significantly different for industrial and domestic effluents (IW and DW). Mini MECs were found to suitably represent cube MEC treatment performance and are useful for screening real wastewaters for potential larger scale MEC treatment. Different acclimation procedures were also investigated with cube and mini MECs to determine the influence on current generation, organic removal, and gas recovery with fermentation effluent as substrate. Pre-acclimating MEC biofilms with domestic wastewater or acetate medium prior to treating fermentation effluent slightly improved COD removal (3-5%), compared to non-pre-acclimated reactors, but gas production and current generation were unchanged by the acclimation method. Differences in protein removal were relatively small between acclimation methods in mini MECS (<5%), with no difference measured in cube MECs. Although pre-acclimation improved treatment in both mini and cube MECs, the difference in COD treatment, current generation, and protein removal was more significant between mini and cube MECs than acclimation methods. These results suggest that acclimation method has a relatively small influence on MEC performance and acetate addition may not be necessary to develop a robust electrically active biofilm. Advisors/Committee Members: Bruce Ernest Logan, Thesis Advisor/Co-Advisor.

Subjects/Keywords: Microbial Electrolysis Cells; Wastewater treatment; Bio-hydrogen production; Mini MECs; Industrial wastewater; Energy recovery

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APA (6^th Edition):

Ullery, M. L. (2014). Screening and acclimation methods for accomplishing treatment and energy recovery from wastewater in microbial electrolysis cells. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/22376

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ullery, Mark Linden. “Screening and acclimation methods for accomplishing treatment and energy recovery from wastewater in microbial electrolysis cells.” 2014. Thesis, Penn State University. Accessed April 15, 2021. https://submit-etda.libraries.psu.edu/catalog/22376.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ullery, Mark Linden. “Screening and acclimation methods for accomplishing treatment and energy recovery from wastewater in microbial electrolysis cells.” 2014. Web. 15 Apr 2021.

Vancouver:

Ullery ML. Screening and acclimation methods for accomplishing treatment and energy recovery from wastewater in microbial electrolysis cells. [Internet] [Thesis]. Penn State University; 2014. [cited 2021 Apr 15]. Available from: https://submit-etda.libraries.psu.edu/catalog/22376.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ullery ML. Screening and acclimation methods for accomplishing treatment and energy recovery from wastewater in microbial electrolysis cells. [Thesis]. Penn State University; 2014. Available from: https://submit-etda.libraries.psu.edu/catalog/22376

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign

5. Christenson, Michael Peter. The design and development of hydrogen isotope extraction technologies for a limit-style liquid lithium loop.

Degree: PhD, Nuclear, Plasma, Radiolgc Engr, 2018, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/100902

► As lithium has grown in popularity as a plasma-facing material, efforts have been placed on examining its viability as a first wall candidate. Lithium has… (more)

▼ As lithium has grown in popularity as a plasma-facing material, efforts have been placed on examining its viability as a first wall candidate. Lithium has proven over numerous studies to improve core confinement, while allowing access to operational regimes previously unattainable while using solid, high-Z divertor and limiter modules. These benefits are due to the fuel retention capabilities of lithium, which allow it to be an almost ideally absorbing boundary, which is both beneficial and problematic. While lithium exhibits a number of other advantages and disadvantages as a plasma-facing material, none is more important than the tritium retention problem. As such, extraction technologies must be constructed and verified within the scope of larger scale lithium loop systems that separate lithium impurities, recover deuterium and tritium, and recycle clean liquid lithium back to the plasma-material interface. Laboratory-scale and pilot-scale studies have been conducted at the Center for Plasma-Material Interactions at the University of Illinois to investigate a number of phenomena that influence the recovery of entrained tritium from lithium. While the ultimate goal is to develop a fully-functional liquid lithium loop for the Lithium Metal Infused Trenches plasma-facing component, complete with efficient hydrogen reclamation technologies, there exists a lack in understanding within the community of the thermochemical fundamentals that are envisioned to drive tritium reclamation. Of specific interest are the evolution fluxes of hydrogen isotopes from solutions of various concentrations of hydrogen in lithium, and the associated temperatures. The knowledge of how the isotopic fraction affects recovery is pivotal to determining the appropriate thermal treatment technique. The laboratory-scale experiments in this report aimed at filling in the knowledge gaps in the literature with regards to the thermochemistry of the hydrogen-lithium system. In all cases, hydrogen was used as an isotopic surrogate for deuterium and tritium. Success was based on an individual samples ability to evolve molecular hydrogen at rates that would match or exceed in-vessel wall losses, determined from a simulated Lithium-Walled International Thermonuclear Experimental Reactor scenario. The hydrogen degassing of pure lithium hydride was observed to exceed fuel loss by a factor of two or greater, at temperatures near the melting point for hydride. Samples of both solid and liquid lithium were subjected to different hydrogen environments under a variety of exposure conditions. During plasma exposures, evidence of saturation, where hydride layers are formed at or near the sample surface and inhibit hydrogen absorption, was witnessed for solid lithium samples. Liquid samples exhibited this behavior to a lesser degree; however, mass diffusion was able to transport the insulating species away from the surface and absorption was able to continue, albeit to a lesser extent than was initially detected. The sub-surface chemistry was found to still be… Advisors/Committee Members: Ruzic, David N (advisor), Ruzic, David N (Committee Chair), Allain, Jean Paul (committee member), Brooks, Caleb (committee member), Andruczyk, Daniel (committee member), Krogstad, Jessica (committee member).

Subjects/Keywords: Plasma; Lithium; Hydrogen; Deuterium; Tritium; Retention; Recovery; Recycling; Thermoelectic Magnetohydrodynamics; Dissolution; Precipitation; Flux; Exposure

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APA (6^th Edition):

Christenson, M. P. (2018). The design and development of hydrogen isotope extraction technologies for a limit-style liquid lithium loop. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/100902

Chicago Manual of Style (16^th Edition):

Christenson, Michael Peter. “The design and development of hydrogen isotope extraction technologies for a limit-style liquid lithium loop.” 2018. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 15, 2021. http://hdl.handle.net/2142/100902.

MLA Handbook (7^th Edition):

Christenson, Michael Peter. “The design and development of hydrogen isotope extraction technologies for a limit-style liquid lithium loop.” 2018. Web. 15 Apr 2021.

Vancouver:

Christenson MP. The design and development of hydrogen isotope extraction technologies for a limit-style liquid lithium loop. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/2142/100902.

Council of Science Editors:

Christenson MP. The design and development of hydrogen isotope extraction technologies for a limit-style liquid lithium loop. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/100902

King Abdullah University of Science and Technology

6. Villalobos, Luis Francisco. Complexation-Induced Phase Separation: Preparation of Metal-Rich Polymeric Membranes.

Degree: Physical Science and Engineering (PSE) Division, 2017, King Abdullah University of Science and Technology

URL: http://hdl.handle.net/10754/625433

► The majority of state-of-the-art polymeric membranes for industrial or medical applications are fabricated by phase inversion. Complexation induced phase separation (CIPS)—a surprising variation of this… (more)

▼ The majority of state-of-the-art polymeric membranes for industrial or medical applications are fabricated by phase inversion. Complexation induced phase separation (CIPS)—a surprising variation of this well-known process—allows direct fabrication of hybrid membranes in existing facilities. In the CIPS process, a first step forms the thin metal-rich selective layer of the membrane, and a succeeding step the porous support. Precipitation of the selective layer takes place in the same solvent used to dissolve the polymer and is induced by a small concentration of metal ions. These ions form metal-coordination-based crosslinks leading to the formation of a solid skin floating on top of the liquid polymer film. A subsequent precipitation in a nonsolvent bath leads to the formation of the porous support structure. Forming the dense layer and porous support by different mechanisms while maintaining the simplicity of a phase inversion process, results in unprecedented control over the final structure of the membrane. The thickness and morphology of the dense layer as well as the porosity of the support can be controlled over a wide range by manipulating simple process parameters. CIPS facilitates control over (i) the thickness of the dense layer throughout several orders of magnitude—from less than 15 nm to more than 6 μm, (ii) the type and amount of metal ions loaded in the dense layer, (iii) the morphology of the membrane surface, and (iv) the porosity and structure of the support. The nature of the CIPS process facilitates a precise loading of a high concentration of metal ions that are located in only the top layer of the membrane. Moreover, these metal ions can be converted—during the membrane fabrication process—to nanoparticles or crystals. This simple method opens up fascinating possibilities for the fabrication of metal-rich polymeric membranes with a new set of properties. This dissertation describes the process in depth and explores promising applications: (i) catalytic membranes containing palladium nanoparticles (PdNPs), (ii) antibiofouling tight-UF membranes containing silver chloride (AgCl) crystals, and (iii) palladiumrich PBI hollow fibers for H2 recovery. Advisors/Committee Members: Peinemann, Klaus-Viktor (advisor), Pinnau, Ingo (committee member), Eddaoudi, Mohamed (committee member), Freeman, Benny Dean (committee member).

Subjects/Keywords: asymmetric membrane; macromolecule-metal complex; Phase Inversion; Hydrogen recovery; Anti-biofouling; Catalytic membrane

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APA (6^th Edition):

Villalobos, L. F. (2017). Complexation-Induced Phase Separation: Preparation of Metal-Rich Polymeric Membranes. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/625433

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Villalobos, Luis Francisco. “Complexation-Induced Phase Separation: Preparation of Metal-Rich Polymeric Membranes.” 2017. Thesis, King Abdullah University of Science and Technology. Accessed April 15, 2021. http://hdl.handle.net/10754/625433.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Villalobos, Luis Francisco. “Complexation-Induced Phase Separation: Preparation of Metal-Rich Polymeric Membranes.” 2017. Web. 15 Apr 2021.

Vancouver:

Villalobos LF. Complexation-Induced Phase Separation: Preparation of Metal-Rich Polymeric Membranes. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2017. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/10754/625433.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Villalobos LF. Complexation-Induced Phase Separation: Preparation of Metal-Rich Polymeric Membranes. [Thesis]. King Abdullah University of Science and Technology; 2017. Available from: http://hdl.handle.net/10754/625433

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

RMIT University

7. Shabani, B. Solar-hydrogen combined heat and power systems for remote area power supply.

Degree: 2010, RMIT University

URL: http://researchbank.rmit.edu.au/view/rmit:6148

► The focus in this thesis is on solar-hydrogen combined heat and power (CHP) systems for supplying both electrical power and hot water in remote areas.… (more)

▼ The focus in this thesis is on solar-hydrogen combined heat and power (CHP) systems for supplying both electrical power and hot water in remote areas. The stand-alone solar-hydrogen system studied uses a photovoltaic array to meet the electrical demand directly to the maximum extent possible. Any surplus is fed to a Proton Exchange Membrane (PEM) electrolyser to produce hydrogen for storage. At later times when there is insufficient supply from the PV array, hydrogen is drawn from the storage and input to a PEM fuel cell to generate electricity to meet the supply deficit. The main hurdles facing solar-hydrogen systems are low round-trip energy efficiency in short-term energy storage applications compared to traditional storage systems like batteries, and high capital cost. The thesis investigates fuel cell heat recovery in the context of the complete solar-hydrogen system with the aims of increasing the overall system energy efficiency, and hence improving system economics. An advanced simulation model based on Visual Pascal for sizing and performing techno-economic analysis on the performance of solar-hydrogen CHP systems has been developed. Individual analyses on the system components, energy and cost analyses, waste recovery analysis, and economic optimisation of the system are some of the key capabilities of the model. The techno-economic characteristics of a remote area power supply system for a typical remote household in south-eastern Australia with a nominal 5 kWh daily demand profile have been investigated using the model. Optimal sizing of the fuel cell yields an 8% improvement in the average annual efficiency in power production, and a 12% reduction in the unit cost of electricity generated. Also the recovery of heat from the fuel cell for water heating increases the average annual energy efficiency of the optimally-sized fuel cell from around 40% in electrical power production to about 65% in a CHP application. The value of the recovered heat when used for domestic hot water supply is estimated to be equivalent to more than 10% of the overall cost of the system. The technical feasibility of using a solar-hydrogen system in CHP mode and the economic viability of this option are confirmed by performing an experimental investigation on a 500 W water-cooled PEM fuel cell system. The experimental study also showed that the stoichiometry of the input air, and the fuel cell operating temperature influence the overall performance of the solar-hydrogen CHP system significantly. The findings from this study will assist in the development of a cost-effective solar-hydrogen system for remote applications suitable for future commercialisation.

Subjects/Keywords: Fields of Research; solar-hydrogen; combined heat and power; PEM fuel cell; heat recovery; remote areas power supply

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APA (6^th Edition):

Shabani, B. (2010). Solar-hydrogen combined heat and power systems for remote area power supply. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:6148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shabani, B. “Solar-hydrogen combined heat and power systems for remote area power supply.” 2010. Thesis, RMIT University. Accessed April 15, 2021. http://researchbank.rmit.edu.au/view/rmit:6148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shabani, B. “Solar-hydrogen combined heat and power systems for remote area power supply.” 2010. Web. 15 Apr 2021.

Vancouver:

Shabani B. Solar-hydrogen combined heat and power systems for remote area power supply. [Internet] [Thesis]. RMIT University; 2010. [cited 2021 Apr 15]. Available from: http://researchbank.rmit.edu.au/view/rmit:6148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shabani B. Solar-hydrogen combined heat and power systems for remote area power supply. [Thesis]. RMIT University; 2010. Available from: http://researchbank.rmit.edu.au/view/rmit:6148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Newcastle

8. Sarkar, Md Shahjahan Kaisar Alam. Electroflotation: its application to water treatment and mineral processing.

Degree: PhD, 2012, University of Newcastle

URL: http://hdl.handle.net/1959.13/930125

►

Research Doctorate - Doctor of Philosophy (PhD)

Flotation of particles of diameter less than 10 μm is important economically yet recovery is very poor in… (more)

▼

Research Doctorate - Doctor of Philosophy (PhD)

Flotation of particles of diameter less than 10 μm is important economically yet recovery is very poor in conventional flotation machines where the bubble diameter is typically greater than 600 μm. Many studies have reported that flotation recovery of fine particles increases with decreased bubble size. Electroflotation can create very fine hydrogen and oxygen bubbles and may be a viable option to recover very fine particles. This study aims to develop an increased understanding of the principles of electroflotation and to use this knowledge to float very fine particles. The interaction between the gas phase with the mineral surface may bring about changes in the surface properties of the mineral, which can be either beneficial or detrimental in improving the flotation recovery. To investigate this interaction, flotation recovery of silica between air and molecular hydrogen was performed in a laboratory Denver, type D12, flotation machine. For both gases, the pH of the suspension, gas flow rate, concentration of collector and frother, solids concentration, particle size and speed of impeller were kept constant. Almost identical recoveries were obtained for both gases, suggesting that gas composition played no significant role in silica flotation. There is wide variation in the reported measurements of bubble size in electroflotation, and uncertainty with the influence of electrode curvature, surface preparation and current density on bubble size have made it difficult to effectively design an efficient electroflotation system for fine particle recovery. Experiments were performed in a viewing cell that allowed direct visualization of hydrogen bubbles being generated and transported away from platinum wire electrodes of 90, 120 and 190 μm in diameter. It was found that the detached bubble diameter varied between 15-23 μm in diameter, and for each wire diameter, was little influenced by the applied current in the range 150-350 A/m². The measurements were consistent with those predicted from a simple force-balance analysis based on a H2-Pt-0.2M Na₂SO₄ contact angle of 0.18°. Interestingly, upon detachment the bubble size increased rapidly, recording up to an 8-fold increase in volume in the first few millimetres of rise, before approaching a steady state diameter of between 30-50 μm in the bulk. This increase in bubble size was found to be mostly due to the transfer of dissolve hydrogen into the growing bubble while moving through the electrolyte that was super-saturated with dissolved hydrogen. The equilibrium bulk diameter was found to be a function of the rate of hydrogen production, bubble nucleation rate, and dissolved gas concentration field. Consequently, it was concluded that in order to optimise electroflotation performance the cell geometry needed to be designed to optimise the contact between the supersaturated liquid and the rising bubble plume. By doing this, the volumetric flux of bubbles will be maximised leading to improved flotation performance. The…

Advisors/Committee Members: University of Newcastle. Faculty of Engineering and Built Environment, School of Engineering.

Subjects/Keywords: bubble size; detachment diameter; bulk diameter; recovery; bubble particle aggregare; bubble surface coverage; current density; bubble flux; hydrogen bubble generation

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APA (6^th Edition):

Sarkar, M. S. K. A. (2012). Electroflotation: its application to water treatment and mineral processing. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/930125

Chicago Manual of Style (16^th Edition):

Sarkar, Md Shahjahan Kaisar Alam. “Electroflotation: its application to water treatment and mineral processing.” 2012. Doctoral Dissertation, University of Newcastle. Accessed April 15, 2021. http://hdl.handle.net/1959.13/930125.

MLA Handbook (7^th Edition):

Sarkar, Md Shahjahan Kaisar Alam. “Electroflotation: its application to water treatment and mineral processing.” 2012. Web. 15 Apr 2021.

Vancouver:

Sarkar MSKA. Electroflotation: its application to water treatment and mineral processing. [Internet] [Doctoral dissertation]. University of Newcastle; 2012. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/1959.13/930125.

Council of Science Editors:

Sarkar MSKA. Electroflotation: its application to water treatment and mineral processing. [Doctoral Dissertation]. University of Newcastle; 2012. Available from: http://hdl.handle.net/1959.13/930125

9. Correia, João Manuel Bento. Aplicação de um ciclo orgânico de Rankine à indústria Naval.

Degree: 2014, Repositório Científico do Instituto Politécnico de Lisboa

URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4337

►

Trabalho Final de Mestrado para obtenção de grau de Mestre em Engenharia Mecânica

Actualmente o universo dos meios de transporte, de pessoas e mercadorias, está… (more)

▼

Trabalho Final de Mestrado para obtenção de grau de Mestre em Engenharia Mecânica

Actualmente o universo dos meios de transporte, de pessoas e mercadorias, está a atravessar uma fase de transformação no que toca à fonte de energia que os fazem mover. Durante o século XX, os combustíveis derivados de petróleo ganharam um peso significativo, praticamente total, no que toca à locomoção de meios de transporte. Facto que, ao que tudo indica, será diferente já desde o início dest e século XXI. Empresa experiente no meio naval, sector que não é alheio a esta transformação, a TecnoVeritas, conhecendo as necessidades do meio, veio a propor ao autor a participação no desenvolvimento de um Ciclo Orgânico de Rankine, destinado à instalação a bordo de navios. Os navios são, como grande maioria das máquinas térmicas, uma fonte de desperdício energético, dissipando grandes quantidades de energia térmica passível de ser recuperada através de um Ciclo Orgânico de Rankine, que transforma a ener gia térmica dissipada em energia eléctrica útil. Na grande maioria dos navios existentes, olhando para a sua configuração mecânica, é possível de se concluir que a energia eléctrica recuperada não seria de grande utilidade no momento em que esta é produzid a, sendo por isso que é também objecto de estudo deste documento a produção de hidrogénico, como forma de armazenamento de energia. No presente documento será levado a cabo também um estudo de viabilidade para os diferentes regimes de potência para um determinado módulo ORC/Hidrogénio.

Currently the universe of transportation of people and goods is going through a transformation phase in terms of primary energy sources. During the twentieth century, the petroleum-based fuels gained a significant, almost complete weight intransportation. This fact, according to all indications, will be different since the beginning of XXI century. TecnoVeritas is an experienced company in the marine world, sector which is not alien to this transformation, knows the needs of the industry, has proposed to the author, a participation in the development of an Organic Rankine Cycle, intended for onboard installation in ships. The vessels are, as the vast majority of heat engines, a source of energy waste ,dissipating large amounts of energy which can be recovered through an Organic Rankine Cycle, which converts the thermal energy dissipated into useful electric energy. In most existing ships, looking for its mechanical configuration, it is possible to conclude that the electrical energy recovered would not be very useful at the time it is produced, which is why the study of the hydrogen production as a form of energy storage is also the subject of this work. A feasibility study for the different power ratings for a particular module ORC / Hydrogen, will also be carried out herein.

Advisors/Committee Members: Costa, Jorge Mendonça e, Antunes, Jorge Manuel.

Subjects/Keywords: Energia; Navios; Ciclo orgânico de Rankine; Hidrogénio; Recuperação de energia; Energy; Ships; Rankine cycle; Hydrogen; Energy recovery

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Correia, J. M. B. (2014). Aplicação de um ciclo orgânico de Rankine à indústria Naval. (Thesis). Repositório Científico do Instituto Politécnico de Lisboa. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4337

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Correia, João Manuel Bento. “Aplicação de um ciclo orgânico de Rankine à indústria Naval.” 2014. Thesis, Repositório Científico do Instituto Politécnico de Lisboa. Accessed April 15, 2021. http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4337.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Correia, João Manuel Bento. “Aplicação de um ciclo orgânico de Rankine à indústria Naval.” 2014. Web. 15 Apr 2021.

Vancouver:

Correia JMB. Aplicação de um ciclo orgânico de Rankine à indústria Naval. [Internet] [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2014. [cited 2021 Apr 15]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4337.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Correia JMB. Aplicação de um ciclo orgânico de Rankine à indústria Naval. [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2014. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/4337

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Nguyen, Duc-Khanh. Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming.

Degree: 2019, Ghent University

URL: http://hdl.handle.net/1854/LU-8614497

► Using methanol as an alternative fuel for gasoline engines can reduce CO2 emissions. Engines and fuel technology are scalable, compact and can be produced in… (more)

Subjects/Keywords: Technology and Engineering; methanol; diluted combustion; spark-ignition engines; fuel reforming; molar expansion ratio; waste heat recovery; hydrogen-rich gas

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APA (6^th Edition):

Nguyen, D. (2019). Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming. (Thesis). Ghent University. Retrieved from http://hdl.handle.net/1854/LU-8614497

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nguyen, Duc-Khanh. “Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming.” 2019. Thesis, Ghent University. Accessed April 15, 2021. http://hdl.handle.net/1854/LU-8614497.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nguyen, Duc-Khanh. “Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming.” 2019. Web. 15 Apr 2021.

Vancouver:

Nguyen D. Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming. [Internet] [Thesis]. Ghent University; 2019. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/1854/LU-8614497.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nguyen D. Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming. [Thesis]. Ghent University; 2019. Available from: http://hdl.handle.net/1854/LU-8614497

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

11. Mateshov, Dauren. Experimental Study of In Situ Combustion with Decalin and Metallic Catalyst.

Degree: MS, Petroleum Engineering, 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8722

► Using a hydrogen donor and a catalyst for upgrading and increasing oil recovery during in situ combustion is a known and proven technique. Based on… (more)

▼ Using a hydrogen donor and a catalyst for upgrading and increasing oil recovery during in situ combustion is a known and proven technique. Based on research conducted on this process, it is clear that widespread practice in industry is the usage of tetralin as a hydrogen donor. The objective of the study is to find a cheaper hydrogen donor with better or the same upgrading performance. Decalin (C10H18) is used in this research as a hydrogen donor. The experiments have been carried out using field oil and water saturations, field porosity and crushed core for porous medium. Four in situ combustion runs were performed with Gulf of Mexico heavy oil, and three of them were successful. The first run was a control run without any additives to create a base for comparison. The next two runs were made with premixed decalin (5 percent by oil weight) and organometallic catalyst (750 ppm). The following conditions were kept constant during all experimental runs: air injection rate at 3.1 L/min and combustion tube outlet pressure at 300 psig. Analysis of the performance of decalin as a hydrogen donor in in-situ combustion included comparison of results with an experiment where tetralin was used. Data from experiments of Palmer (Palmer-Ikuku, 2009) was used for this purpose, where the same oil, catalyst and conditions were used. Results of experiments using decalin showed better quality of produced oil, higher recovery factor, faster combustion front movement and higher temperatures of oxidation. API gravity of oil in a run with decalin is higher by 4 points compared to a base run and increased 5 points compared to original oil. Oil production increased by 7 percent of OOIP in comparison with base run and was 2 percent higher than the experiment with tetralin. The time required for the combustion front to reach bottom flange decreased 1.6 times compared to the base run. The experiments showed that decalin and organometallic catalysts perform successfully in in situ combustion, and decalin is a worthy replacement for tetralin. Advisors/Committee Members: Mamora, Daulat D. (advisor), Schubert, Jerome J. (committee member), Sun, Yuefeng (committee member).

Subjects/Keywords: Combustion; In-situ Combustion; In Situ Combustion; Air Injection; EOR; Enhanced Oil Recovery; Thermal EOR; Decalin; Hydrogen Donor; Organometallic Catalyst; Iron acetylacetonate

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mateshov, D. (2011). Experimental Study of In Situ Combustion with Decalin and Metallic Catalyst. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8722

Chicago Manual of Style (16^th Edition):

Mateshov, Dauren. “Experimental Study of In Situ Combustion with Decalin and Metallic Catalyst.” 2011. Masters Thesis, Texas A&M University. Accessed April 15, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8722.

MLA Handbook (7^th Edition):

Mateshov, Dauren. “Experimental Study of In Situ Combustion with Decalin and Metallic Catalyst.” 2011. Web. 15 Apr 2021.

Vancouver:

Mateshov D. Experimental Study of In Situ Combustion with Decalin and Metallic Catalyst. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8722.

Council of Science Editors:

Mateshov D. Experimental Study of In Situ Combustion with Decalin and Metallic Catalyst. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8722

12. Sigot, Léa. Epuration fine des biogaz en vue d'une valorisation énergétique en pile à combustible de type SOFC : Adsorption de l'octaméthylcyclotétrasiloxane et du sulfure d'hydrogène : Thorough biogas purification for Solid Oxide Fuel Cell applications : Adsorption of octamethylcyclotetrasiloxane and hydrogen sulfide.

Degree: Docteur es, Science et technique du déchet, 2014, INSA Lyon

URL: http://www.theses.fr/2014ISAL0098

►

Les composés traces présents dans les biogaz sont un frein à leur valorisation énergétique. Trois familles ont été identifiées comme particulièrement nocives pour les catalyseurs… (more)

▼

Les composés traces présents dans les biogaz sont un frein à leur valorisation énergétique. Trois familles ont été identifiées comme particulièrement nocives pour les catalyseurs des reformeurs externes et pour l’anode des piles à combustible de type SOFC : les composés soufrés, siliciés et chlorés. Un traitement poussé du biogaz est donc indispensable pour une telle application. Ce travail à caractère expérimental s’intéresse au développement d’un système de traitement d’affinage destiné à l’adsorption de ces composés. Des matériaux adsorbants ont été sélectionnés pour leur efficacité dans l’élimination du sulfure d’hydrogène (H2S – composé soufré), de l’octaméthylcyclotétrasiloxane (D4 – composé silicié) et du cis-1,2-dichloroéthène (C2H2Cl2 – composé chloré), molécules cibles représentatives des trois familles préjudiciables. La zéolithe étudiée présente la meilleure efficacité d’élimination de l’H2S, tandis que le gel de silice est plus adapté à l’adsorption du D4. Une étude paramétrique a mis en évidence l’influence de la hauteur de lit d’adsorbant, de la concentration en polluant, du débit de gaz, de la présence de composés traces en mélange et de l’humidité sur les performances épuratoires. Des essais sur un biogaz brut d’installation de stockage de déchets non dangereux ont montré qu’il est possible de maintenir une concentration en H2S sous le seuil de tolérance de 1 ppmvH2S du reformeur. En s’appuyant sur des caractérisations physico-chimiques des adsorbants, des hypothèses concernant les mécanismes de rétention ont été proposées pour les couples zéolithe + H2S et gel de silice + D4. L’H2S est adsorbé puis oxydé en soufre élémentaire à la surface de la zéolithe. Lors de l’adsorption sur gel de silice, le D4 semble polymériser en surface. Ces deux phénomènes empêchent la régénération des adsorbants. Une première approche de modélisation des phénomènes d’adsorption pour le couple gel de silice + D4 a permis de déterminer le coefficient global de transfert de masse. Les courbes de percée obtenues expérimentalement pour différentes masses d’adsorbant ont été simulées avec succès. Des « règles de dimensionnement » ont été proposées pour un dimensionnement industriel d’un traitement d’affinage pour une valorisation en SOFC. L’analyse technico-économique a montré que la filière SOFC envisagée est viable techniquement, mais pas économiquement, la technologie SOFC étant encore trop coûteuse par rapport aux techniques de valorisation conventionnelles. Toutefois, la solution semble prometteuse d’un point de vue environnemental.

Biogas energy use is hampered by the presence of trace compounds. Three contaminant families are particularly detrimental for external reforming catalysts and solid oxide fuel cell (SOFC) anodes: sulfur-containing compounds, volatile organic silicon compounds (VOSiC) and chlorinated compounds. Therefore, a thorough biogas treatment is necessary for such an application. This experimental work deals with the development of a polishing treatment for the adsorption of these contaminants.…

Advisors/Committee Members: Benadda, Belkacem (thesis director), Ducom, Gaëlle (thesis director).

Subjects/Keywords: Environnement; Biogaz; Epuration et biogaz; Adsorption; Octaméthylcyclotétrasiloxane; Sulfure d’hydrogène; Valorisation énergètique; Pile à combustible; Environment; Biogas; Gas purification; Adsorption; Octamethylcyclotetrasiloxane; Hydrogen sulfide; Energy Recovery; Fuel cell; 363.738 072

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sigot, L. (2014). Epuration fine des biogaz en vue d'une valorisation énergétique en pile à combustible de type SOFC : Adsorption de l'octaméthylcyclotétrasiloxane et du sulfure d'hydrogène : Thorough biogas purification for Solid Oxide Fuel Cell applications : Adsorption of octamethylcyclotetrasiloxane and hydrogen sulfide. (Doctoral Dissertation). INSA Lyon. Retrieved from http://www.theses.fr/2014ISAL0098

Chicago Manual of Style (16^th Edition):

Sigot, Léa. “Epuration fine des biogaz en vue d'une valorisation énergétique en pile à combustible de type SOFC : Adsorption de l'octaméthylcyclotétrasiloxane et du sulfure d'hydrogène : Thorough biogas purification for Solid Oxide Fuel Cell applications : Adsorption of octamethylcyclotetrasiloxane and hydrogen sulfide.” 2014. Doctoral Dissertation, INSA Lyon. Accessed April 15, 2021. http://www.theses.fr/2014ISAL0098.

MLA Handbook (7^th Edition):

Sigot, Léa. “Epuration fine des biogaz en vue d'une valorisation énergétique en pile à combustible de type SOFC : Adsorption de l'octaméthylcyclotétrasiloxane et du sulfure d'hydrogène : Thorough biogas purification for Solid Oxide Fuel Cell applications : Adsorption of octamethylcyclotetrasiloxane and hydrogen sulfide.” 2014. Web. 15 Apr 2021.

Vancouver:

Sigot L. Epuration fine des biogaz en vue d'une valorisation énergétique en pile à combustible de type SOFC : Adsorption de l'octaméthylcyclotétrasiloxane et du sulfure d'hydrogène : Thorough biogas purification for Solid Oxide Fuel Cell applications : Adsorption of octamethylcyclotetrasiloxane and hydrogen sulfide. [Internet] [Doctoral dissertation]. INSA Lyon; 2014. [cited 2021 Apr 15]. Available from: http://www.theses.fr/2014ISAL0098.

Council of Science Editors:

Sigot L. Epuration fine des biogaz en vue d'une valorisation énergétique en pile à combustible de type SOFC : Adsorption de l'octaméthylcyclotétrasiloxane et du sulfure d'hydrogène : Thorough biogas purification for Solid Oxide Fuel Cell applications : Adsorption of octamethylcyclotetrasiloxane and hydrogen sulfide. [Doctoral Dissertation]. INSA Lyon; 2014. Available from: http://www.theses.fr/2014ISAL0098

13. Ghandehariun, Samane. Thermal management of the copper-chlorine cycle for hydrogen production: analytical and experimental investigation of heat recovery from molten salt.

Degree: 2012, University of Ontario Institute of Technology

URL: http://hdl.handle.net/10155/271

► Hydrogen is known as a clean energy carrier which has the potential to play a major role in addressing the climate change and global warming,… (more)

▼ Hydrogen is known as a clean energy carrier which has the potential to play a major role in addressing the climate change and global warming, and thermochemical water splitting via the copper-chlorine cycle is a promising method of hydrogen production. In this research, thermal management of the copper-chlorine cycle for hydrogen production is investigated by performing analytical and experimental analyses of selected heat recovery options. First, the heat requirement of the copper-chlorine cycle is estimated. The pinch analysis is used to determine the maximum recoverable heat within the cycle, and where in the cycle the recovered heat can be used efficiently. It is shown that a major part of the potential heat recovery can be achieved by cooling and solidifying molten copper(I) chloride exiting one step in the cycle: the oxygen reactor. Heat transfer from molten CuCl can be carried out through direct contact or indirect contact methods. Predictive analytical models are developed to analyze a direct contact heat recovery process (i.e. a spray column) and an indirect contact heat recovery process (i.e. a double-pipe heat exchanger). Characteristics of a spray column, in which recovered heat from molten CuCl is used to produce superheated steam, are presented. Decreasing the droplet size may increase the heat transfer rate from the droplet, and hence decreases the required height of the heat exchanger. For a droplet of 1 mm, the height of the heat exchanger is predicted to be about 7 m. The effect of hydrogen production on the heat exchanger diameter was also shown. For a hydrogen production rate of 1000 kg/day, the diameter of the heat exchanger is about 3 m for a droplet size of 1 mm and 2.2 m for a droplet size of 2 mm. The results for axial growth of the solid layer and variations of the coolant temperature and wall temperature of a double-pipe heat exchanger are also presented. It is shown that reducing the inner tube diameter will increase the heat exchanger length and increase the outlet temperature of air significantly. It is shown that the air temperature increases to 190 °C in a heat exchanger with a length of 15 cm and inner tube radius of 10 cm. The length of a heat exchanger with the inner tube radius of 12 cm is predicted to be about 53 cm. The outlet temperature of air is about 380 °C in this case. The length of a heat exchanger with an inner tube diameter of 24 cm is predicted to be about 53 cm and 91 cm for coolant flow rates of 3 g/s and 4 g/s, respectively. Increasing the mass flow rate of air will increase the total heat flux from the molten salt by increasing the length of the heat exchanger. Experimental studies are performed to validate the proposed methods and to further investigate their feasibility. The hazards involving copper(I) chloride are also investigated, as well as corresponding hazard reduction options. Using the reactant Cu2OCl2 in the oxygen production step to absorb CuCl vapor is the most preferable option compared to the alternatives, which include absorbing CuCl vapor with water… Advisors/Committee Members: Naterer, Greg, Rosen, Marc.

Subjects/Keywords: Copper-chlorine cycle; Hydrogen production; Experimental; Molten salt; Heat recovery

…124 Figure 9-5 Water scrubbing for the recovery of CuCl to the hydrogen production reactor… …different values of hydrogen production rate. The models are used in improving heat recovery… …88 Chapter 8 Results of analytical and experimental analysis of heat recovery from molten… …90 8.1.2 Heat recovery from molten CuCl… …9.4 Experimental studies for CuCl recovery…

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APA (6^th Edition):

Ghandehariun, S. (2012). Thermal management of the copper-chlorine cycle for hydrogen production: analytical and experimental investigation of heat recovery from molten salt. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/271

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ghandehariun, Samane. “Thermal management of the copper-chlorine cycle for hydrogen production: analytical and experimental investigation of heat recovery from molten salt.” 2012. Thesis, University of Ontario Institute of Technology. Accessed April 15, 2021. http://hdl.handle.net/10155/271.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ghandehariun, Samane. “Thermal management of the copper-chlorine cycle for hydrogen production: analytical and experimental investigation of heat recovery from molten salt.” 2012. Web. 15 Apr 2021.

Vancouver:

Ghandehariun S. Thermal management of the copper-chlorine cycle for hydrogen production: analytical and experimental investigation of heat recovery from molten salt. [Internet] [Thesis]. University of Ontario Institute of Technology; 2012. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/10155/271.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ghandehariun S. Thermal management of the copper-chlorine cycle for hydrogen production: analytical and experimental investigation of heat recovery from molten salt. [Thesis]. University of Ontario Institute of Technology; 2012. Available from: http://hdl.handle.net/10155/271

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

14. Novosád, Jan. Alternativní pohon automobilů: Alternative Drive of Automobile.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/10887

► In this work is processed a survey of perspective alternative drives in motor vehicles. There are main characteristic for each mentioned drive, their advantages and… (more)

Subjects/Keywords: Alternativní pohon; elektromobil; hybridní pohon; vodík; palivový článek; akumulátor; CNG; LPG; biopaliva; rekuperace energie.; Alternative drive; electro mobile; hybrid drive; hydrogen; fuel cell; battery; CNG; LPG; biofuels; energy recovery.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Novosád, J. (2018). Alternativní pohon automobilů: Alternative Drive of Automobile. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/10887

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Novosád, Jan. “Alternativní pohon automobilů: Alternative Drive of Automobile.” 2018. Thesis, Brno University of Technology. Accessed April 15, 2021. http://hdl.handle.net/11012/10887.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Novosád, Jan. “Alternativní pohon automobilů: Alternative Drive of Automobile.” 2018. Web. 15 Apr 2021.

Vancouver:

Novosád J. Alternativní pohon automobilů: Alternative Drive of Automobile. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/11012/10887.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Novosád J. Alternativní pohon automobilů: Alternative Drive of Automobile. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/10887

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Central Florida

15. Oztek, Muzaffer Tonguc. Recovery Of Hydrogen And Helium From Their Mixtures Using Metal Hydrides.

Degree: 2005, University of Central Florida

URL: https://stars.library.ucf.edu/etd/480

► Waste streams of hydrogen and helium mixtures are produced at the Kennedy Space Center during purging of the hydrogen systems and supply lines. This process… (more)

▼ Waste streams of hydrogen and helium mixtures are produced at the Kennedy Space Center during purging of the hydrogen systems and supply lines. This process is done prior to and after hydrogen servicing. The purged waste gases are lost to the atmosphere, resulting in an annual loss of 2 million and 0.1 million standard cubic meters of helium and hydrogen, respectively. Recovery of these gases will have an economic benefit. Metals, alloys, and intermetallics are known to react with hydrogen in favorable conditions; therefore, they have the possibility of serving as separating and recovery agents. In this study, Mg2Ni, VTiNi and LaNi5 were studied for the separation of H2 from He, using differential scanning calorimetry and thermal volumetric analysis. The ability of LaNi5 to react with hydrogen reversibly at room temperature was verified, and further analysis focused on this compound. Size reduction and activation of LaNi5 by mechanical milling was investigated using different milling parameters for the purpose of activating the material for hydrogen absorption. Because it has been shown that addition of aluminum to LaNi5 resulted in improved hydriding and dehydriding properties, that system was studied further here. In this study, aluminum was added to LaNi5 by mechanical milling. Hydriding properties and elemental compositions of the samples were determined afterwards. The hydrogen absorption rate and capacity were compared to that of LaNi5. Both LaNi5 and its Al doped derivatives exhibited a reduced rate of hydrogen uptake and a reduced hydrogen capacity in the presence of helium. The effects of coating the samples with either gold-palladium or platinum were investigated. It was observed that coating the samples with Pt reduced the negative effect of He, whereas AuPd coating did not have any effect. Larger scale studies were done using a continuous U-tube hydride reactor, built and tested for separation of H2¬ from a 20:80 H2:He mixture. The amount of hydrogen retained in the bed was determined and found to be less than that for the batch systems. Advisors/Committee Members: Hampton, Michael.

Subjects/Keywords: hydrogen; recovery; metal hydride; lanthanum nickel; aluminum; ball milling; Chemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oztek, M. T. (2005). Recovery Of Hydrogen And Helium From Their Mixtures Using Metal Hydrides. (Masters Thesis). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/480

Chicago Manual of Style (16^th Edition):

Oztek, Muzaffer Tonguc. “Recovery Of Hydrogen And Helium From Their Mixtures Using Metal Hydrides.” 2005. Masters Thesis, University of Central Florida. Accessed April 15, 2021. https://stars.library.ucf.edu/etd/480.

MLA Handbook (7^th Edition):

Oztek, Muzaffer Tonguc. “Recovery Of Hydrogen And Helium From Their Mixtures Using Metal Hydrides.” 2005. Web. 15 Apr 2021.

Vancouver:

Oztek MT. Recovery Of Hydrogen And Helium From Their Mixtures Using Metal Hydrides. [Internet] [Masters thesis]. University of Central Florida; 2005. [cited 2021 Apr 15]. Available from: https://stars.library.ucf.edu/etd/480.

Council of Science Editors:

Oztek MT. Recovery Of Hydrogen And Helium From Their Mixtures Using Metal Hydrides. [Masters Thesis]. University of Central Florida; 2005. Available from: https://stars.library.ucf.edu/etd/480

16. Estejab, Ali. Mathematical and Molecular Modeling of Ammonia Electrolysis with Experimental Validation.

Degree: PhD, Chemical Engineering (Engineering and Technology), 2018, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1514834805432007

► Nowadays, the development of energy-efficient processes for the treatment of wastewater is becoming an essential research field; taking into account the projected global population rise,… (more)

▼ Nowadays, the development of energy-efficient processes for the treatment of wastewater is becoming an essential research field; taking into account the projected global population rise, the depletion of fresh water, and the necessity for available and renewable sources of energy. Within this context, the electro-oxidation of ammonia has been received considerable and increasing attention due to its advantageous in deammonification of wastewater and at the same time, production of pure hydrogen as a source of energy. However, the performance of this process should be optimized prior to wide industrial utilization.There are several factors that affect the performance of ammonia electrolysis. These factors can be divided into macro scale (like flowrate, concentration) and micro scale (like electrodes material and morphology). The effects of these factors can be evaluated in a mathematical model which would be able to optimize the process. Optimization of the process results in widely and commercially usage of ammonia electrolyzers. In this electrolyzer, water reduces at the cathode, while ammonia oxidizes at the anode. Hydrogen evolution reaction (HER) at the cathode can proceed on transition metals like nickel. However, ammonia oxidation needs noble metals like platinum to proceed; one of the other hindrances of widely commercialization of this process. This problem can be solved if the knowledge of the process kinetics and mechanism of the reaction on the surface of the catalyst clarified.The first part of this research focused on developing a mathematical model using flow regime, transport equations, the ammonia oxidation kinetics on platinum at the anode and the hydrogen evolution kinetics on nickel at the cathode. All of the non-linear differential equations were solved by finite difference methods in a comprehensive FORTRAN code. The model showed both qualitative and quantitative agreement with experimental measurements which were carried on in a bench scale prototype at ammonia concentrations found within wastewater (200 – 1200 mg L-1). The model could predict the electrolyzer performance as high as 95 percent accuracy in average. The optimum electrolyzer performance was found to be dependent on both the applied voltage and the inlet concentrations of reactant and electrolyte.The second part of this research dedicated to the investigation of the effect of platinum, iridium and their bimetallic catalysts on ammonia oxidation process through computational technique. Density functional theory calculations were performed on four platinum-iridium clusters, Pt3-xIrx (x=0-3) to examine ammonia oxidation. The adsorption of NH3-x and N2H4-x on these clusters and the effect of cluster composition on the adsorption were investigated. The relative adsorption energy showed more stability of the intermediates on the Ir3 and less stability as the number of platinum atoms increased in the cluster. These results combined with activation and free energy calculations of sequential dehydrogenation and N-N bond formation reactions… Advisors/Committee Members: Botte, Gerardine (Advisor).

Subjects/Keywords: Chemical Engineering; Environmental Engineering; Experiments; Ammonia Electrolysis; Wastewater Deammonification; Hydrogen Production; Waste-Energy Recovery; Water-Energy Nexus; Ammonia Electro-oxidation Kinetics, Pt-Ir Bimetallic Catalyst; Density Functional Theory

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APA (6^th Edition):

Estejab, A. (2018). Mathematical and Molecular Modeling of Ammonia Electrolysis with Experimental Validation. (Doctoral Dissertation). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1514834805432007

Chicago Manual of Style (16^th Edition):

Estejab, Ali. “Mathematical and Molecular Modeling of Ammonia Electrolysis with Experimental Validation.” 2018. Doctoral Dissertation, Ohio University. Accessed April 15, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1514834805432007.

MLA Handbook (7^th Edition):

Estejab, Ali. “Mathematical and Molecular Modeling of Ammonia Electrolysis with Experimental Validation.” 2018. Web. 15 Apr 2021.

Vancouver:

Estejab A. Mathematical and Molecular Modeling of Ammonia Electrolysis with Experimental Validation. [Internet] [Doctoral dissertation]. Ohio University; 2018. [cited 2021 Apr 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1514834805432007.

Council of Science Editors:

Estejab A. Mathematical and Molecular Modeling of Ammonia Electrolysis with Experimental Validation. [Doctoral Dissertation]. Ohio University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1514834805432007

York University

17. Khalil, Basma Sobhi Khalil Soliman. Development of Hydrogenotrophic Denitritation Process for Municipal Wastewater.

Degree: MASc - Master of Applied Science, Civil Engineering, 2020, York University

URL: https://yorkspace.library.yorku.ca/xmlui/handle/10315/37332

► Shortcut biological nitrogen removal has drawn research attention due to efficient removal of harmful nitrogenous compounds from wastewater by reducing energy and carbon requirements. In… (more)

Subjects/Keywords: Water resources management; Environmental engineering; Wastewater treatment; Shortcut Biological Nitrogen Removal; Resources Recovery; Microbiology; Hydrogenotrophic denitrification; Recycled Activated Sludge; Sequential batch reactor; Environmentally Friendly; Hydrogen; Biochemistry

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APA (6^th Edition):

Khalil, B. S. K. S. (2020). Development of Hydrogenotrophic Denitritation Process for Municipal Wastewater. (Masters Thesis). York University. Retrieved from https://yorkspace.library.yorku.ca/xmlui/handle/10315/37332

Chicago Manual of Style (16^th Edition):

Khalil, Basma Sobhi Khalil Soliman. “Development of Hydrogenotrophic Denitritation Process for Municipal Wastewater.” 2020. Masters Thesis, York University. Accessed April 15, 2021. https://yorkspace.library.yorku.ca/xmlui/handle/10315/37332.

MLA Handbook (7^th Edition):

Khalil, Basma Sobhi Khalil Soliman. “Development of Hydrogenotrophic Denitritation Process for Municipal Wastewater.” 2020. Web. 15 Apr 2021.

Vancouver:

Khalil BSKS. Development of Hydrogenotrophic Denitritation Process for Municipal Wastewater. [Internet] [Masters thesis]. York University; 2020. [cited 2021 Apr 15]. Available from: https://yorkspace.library.yorku.ca/xmlui/handle/10315/37332.

Council of Science Editors:

Khalil BSKS. Development of Hydrogenotrophic Denitritation Process for Municipal Wastewater. [Masters Thesis]. York University; 2020. Available from: https://yorkspace.library.yorku.ca/xmlui/handle/10315/37332

18. Hedayati, Ali. Production in situ d'hydrogène pur par reformage d'éthanol dans un réacteur catalytique à membrane : On-site pure hydrogen production in a catalytic membrane reactor by ethanol steam reforming.

Degree: Docteur es, Energétique, thermique et combustion, 2016, Nantes, Ecole des Mines

URL: http://www.theses.fr/2016EMNA0246

►

Dans ce travail, la production in-situ d'hydrogène (pur) à partir de vapo-reformage d’éthanol (ESR) dans un réacteur catalytique à membrane (MR) a été étudiée. Un… (more)

▼

Dans ce travail, la production in-situ d'hydrogène (pur) à partir de vapo-reformage d’éthanol (ESR) dans un réacteur catalytique à membrane (MR) a été étudiée. Un mélange d'éthanol pur et distillé a été utilisé comme combustible. Le réacteur est constitué d’un catalyseur Pd-Rh/CeO2 et d’une membrane Pd-Ag: l’ensemble est désigné par « reformeur ». Les expériences sur ce reformeur ont été effectuées dans diverses conditions de fonctionnement: température, pression, débit de combustible et rapport molaire de l'eau-éthanol (rapportSC). La performance du réacteur catalytique à membrane (CMR) a été étudiée en termes de facteur de production d'hydrogène théorique, d’efficacité de production de l’hydrogène et de la part d’hydrogène récupérée. L’évaluation thermodynamique du reformeur a été présentée. L'analyse exergétique a été réalisée sur la base des résultats expérimentaux visant non seulement à comprendre la performance thermodynamique du reformeur, mais aussi d'introduire l'application de l'analyse exergétique dans les études CMRs. L'analyse exergétique a fourni des informations importantes sur l'effet des conditions d'exploitation et les pertes thermodynamiques, et a donné lieu à la compréhension des meilleures conditions de fonctionnement. Outre les évaluations expérimentales et thermodynamiques du reformeur, la simulation de la dynamique de la production d'hydrogène (perméation) a été effectuée comme la dernière étape pour étudier l'applicabilité d'un tel système dans le cadre d'une utilisation finale réelle, qui peut être l’alimentation d’une pile à combustible. La simulation présentée dans ce travail est semblable aux ajustements de débit d'hydrogène nécessaires pour régler la charge électrique d'une pile à combustible répondant à des besoins variables.

In this work, in-situ production of fuel cell grade hydrogen (pure hydrogen) via catalytic ethanol steam reforming (ESR) in a membrane reactor (MR) was investigated. A mixture of pure ethanol and distilled was used as the fuel. ESR experiments were carried out over a Pd-Rh/CeO2 catalyst in a Pd-Ag membrane reactor – named as the fuel reformer – at variety of operating conditions regarding the operating temperature, pressure, fuel flow rate, and the molar ratio of water-ethanol (S/C ratio). The performance of the catalytic membrane reactor (CMR) was studied in terms of pure hydrogen production, hydrogen yield, andhydrogen recovery.Thermodynamic evaluation of the CMR was presented as a supplement to the comprehensive investigation of the overall performance of the mentioned pure hydrogen generating system. Exergy analysis was performed based on the experimental results aiming not only to understand the thermodynamic performance of the fuel reformer, but also to introduce the application of the exergy analysis in CMRs studies. Exergy analysis provided important information on the effect of operating conditions and thermodynamic losses, resulting in understanding of the best operating conditions.In addition to the experimental and thermodynamic evaluation of the…

Advisors/Committee Members: Le Corre, Olivier (thesis director), Llorca, Jordi (thesis director).

Subjects/Keywords: Réacteur à membrane; Vapo-reformage de l’éthanol; Teneur en hydrogène; Récupération d’hydrogène; Analyse exergétique; Rendement exergétique; Rendement thermique; Modèle statique; Simulation dynamique; Loi de Sieverts; Membrane reactor; Ethanol steam reforming; Pure hydrogen; Hydrogen yield; Hydrogen recovery; Exergy analysis; Exergy efficiency; Thermal efficiency; Static model; Dynamic simulation; Sieverts’ law

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APA (6^th Edition):

Hedayati, A. (2016). Production in situ d'hydrogène pur par reformage d'éthanol dans un réacteur catalytique à membrane : On-site pure hydrogen production in a catalytic membrane reactor by ethanol steam reforming. (Doctoral Dissertation). Nantes, Ecole des Mines. Retrieved from http://www.theses.fr/2016EMNA0246

Chicago Manual of Style (16^th Edition):

Hedayati, Ali. “Production in situ d'hydrogène pur par reformage d'éthanol dans un réacteur catalytique à membrane : On-site pure hydrogen production in a catalytic membrane reactor by ethanol steam reforming.” 2016. Doctoral Dissertation, Nantes, Ecole des Mines. Accessed April 15, 2021. http://www.theses.fr/2016EMNA0246.

MLA Handbook (7^th Edition):

Hedayati, Ali. “Production in situ d'hydrogène pur par reformage d'éthanol dans un réacteur catalytique à membrane : On-site pure hydrogen production in a catalytic membrane reactor by ethanol steam reforming.” 2016. Web. 15 Apr 2021.

Vancouver:

Hedayati A. Production in situ d'hydrogène pur par reformage d'éthanol dans un réacteur catalytique à membrane : On-site pure hydrogen production in a catalytic membrane reactor by ethanol steam reforming. [Internet] [Doctoral dissertation]. Nantes, Ecole des Mines; 2016. [cited 2021 Apr 15]. Available from: http://www.theses.fr/2016EMNA0246.

Council of Science Editors:

Hedayati A. Production in situ d'hydrogène pur par reformage d'éthanol dans un réacteur catalytique à membrane : On-site pure hydrogen production in a catalytic membrane reactor by ethanol steam reforming. [Doctoral Dissertation]. Nantes, Ecole des Mines; 2016. Available from: http://www.theses.fr/2016EMNA0246

North Carolina State University

19. Martin, Jerry H II. A New Method to Evaluate Hydrogen Sulfide Removal from Biogas.

Degree: MS, Biological and Agricultural Engineering, 2008, North Carolina State University

URL: http://www.lib.ncsu.edu/resolver/1840.16/1047

► Hydrogen sulfide in biogas fuel increases the speed at which the system utilizing the biogas corrodes. This corrosion may be prevented by separating and removing… (more)

Subjects/Keywords: Bioenergy; Biogas; Animal Wastes; Anaerobic Digestion; Agricultural Waste; Selective Permeability; Methane Production; Methane; Energy Recovery; Hydrogen Sulfide; Membrane

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APA (6^th Edition):

Martin, J. H. I. (2008). A New Method to Evaluate Hydrogen Sulfide Removal from Biogas. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/1047

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Martin, Jerry H II. “A New Method to Evaluate Hydrogen Sulfide Removal from Biogas.” 2008. Thesis, North Carolina State University. Accessed April 15, 2021. http://www.lib.ncsu.edu/resolver/1840.16/1047.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Martin, Jerry H II. “A New Method to Evaluate Hydrogen Sulfide Removal from Biogas.” 2008. Web. 15 Apr 2021.

Vancouver:

Martin JHI. A New Method to Evaluate Hydrogen Sulfide Removal from Biogas. [Internet] [Thesis]. North Carolina State University; 2008. [cited 2021 Apr 15]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1047.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Martin JHI. A New Method to Evaluate Hydrogen Sulfide Removal from Biogas. [Thesis]. North Carolina State University; 2008. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1047

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

20. Allen, Quentin Scott. Microstructural Evaluation of Hydrogen Embrittlement and Successive Recovery in Advanced High Strength Steel.

Degree: MS, 2017, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7617&context=etd

► Advanced high strength steels (AHSS) have high susceptibility to hydrogen embrittlement, and are often exposed to hydrogen environments in processing. In order to study the… (more)

Subjects/Keywords: steel; AHSS; HMT; OIM; hydrogen embrittlement; recovery; diffusion; microstructure; crystalline orientation; Mechanical Engineering

…23 Figure 4-3: The hydrogen recovery of the tested steels… …26 Figure 4-4: A theoretical hydrogen recovery model… …18], [19]. If hydrogen content exceeds the threshold, however, recovery time… …after hydrogen uptake is still unknown. In-depth knowledge of recovery from HE is needed. 2… …rate is an important parameter in evaluating resistance and recovery from hydrogen over time…

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APA (6^th Edition):

Allen, Q. S. (2017). Microstructural Evaluation of Hydrogen Embrittlement and Successive Recovery in Advanced High Strength Steel. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7617&context=etd

Chicago Manual of Style (16^th Edition):

Allen, Quentin Scott. “Microstructural Evaluation of Hydrogen Embrittlement and Successive Recovery in Advanced High Strength Steel.” 2017. Masters Thesis, Brigham Young University. Accessed April 15, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7617&context=etd.

MLA Handbook (7^th Edition):

Allen, Quentin Scott. “Microstructural Evaluation of Hydrogen Embrittlement and Successive Recovery in Advanced High Strength Steel.” 2017. Web. 15 Apr 2021.

Vancouver:

Allen QS. Microstructural Evaluation of Hydrogen Embrittlement and Successive Recovery in Advanced High Strength Steel. [Internet] [Masters thesis]. Brigham Young University; 2017. [cited 2021 Apr 15]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7617&context=etd.

Council of Science Editors:

Allen QS. Microstructural Evaluation of Hydrogen Embrittlement and Successive Recovery in Advanced High Strength Steel. [Masters Thesis]. Brigham Young University; 2017. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7617&context=etd

Georgia Tech

21. Bessho, Naoki. Advanced pressure swing adsorption system with fiber sorbents for hydrogen recovery.

Degree: PhD, Chemical Engineering, 2010, Georgia Tech

URL: http://hdl.handle.net/1853/42822

► A new concept of a "fiber sorbent" has been investigated. The fiber sorbent is produced as a pseudo-monolithic material comprising polymer (cellulose acetate, CA) and… (more)

Subjects/Keywords: Pressure swing adsorption; Phase separation; Adsorption; Zeolite; Material processing; Polymer; Gas separations; Hydrogen recovery; Fiber spinning; Separation (Technology); Gases Separation

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APA (6^th Edition):

Bessho, N. (2010). Advanced pressure swing adsorption system with fiber sorbents for hydrogen recovery. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/42822

Chicago Manual of Style (16^th Edition):

Bessho, Naoki. “Advanced pressure swing adsorption system with fiber sorbents for hydrogen recovery.” 2010. Doctoral Dissertation, Georgia Tech. Accessed April 15, 2021. http://hdl.handle.net/1853/42822.

MLA Handbook (7^th Edition):

Bessho, Naoki. “Advanced pressure swing adsorption system with fiber sorbents for hydrogen recovery.” 2010. Web. 15 Apr 2021.

Vancouver:

Bessho N. Advanced pressure swing adsorption system with fiber sorbents for hydrogen recovery. [Internet] [Doctoral dissertation]. Georgia Tech; 2010. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/1853/42822.

Council of Science Editors:

Bessho N. Advanced pressure swing adsorption system with fiber sorbents for hydrogen recovery. [Doctoral Dissertation]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/42822

Edith Cowan University

22. Baccini, Desmond. Gamma irradiation response of photonic crystal and standard optical fibre Bragg grating sensors for radiation dosimetry.

Degree: 2019, Edith Cowan University

URL: https://ro.ecu.edu.au/theses/2226

► This study investigates the use of Optical Fibre Bragg Grating Sensors (FBGs) for Gamma Radiation Dosimetry. A comparative analysis of responses to gamma irradiation between… (more)

▼ This study investigates the use of Optical Fibre Bragg Grating Sensors (FBGs) for Gamma Radiation Dosimetry. A comparative analysis of responses to gamma irradiation between standard commercial FBGs and new generation FBGs written in Photonic Crystal fibre (PCF) were examined under similar regimes and conditions. Current research suggests that the FBGs performance, when exposed to Cobalt-60 gamma irradiation, can suffer cross sensitivity problems resulting from different external effects such as temperature. However, FBGs written in PCFs may be able to overcome these problems due to their design, flexibility of the shape, and size of the micro-holes in a PCF. Previous research has indicated the Bragg wavelength shift (BWS) of standard FBGs increases with accumulated Gamma dose. This shift appears to be permanent, indicating that gamma irradiation permanently affects the Bragg wavelength of the FBG. To better understand these effects, and determine the suitability of particular FBGs for use in radiation dosimetry, measurements in relation to the effects of pre-irradiation, dose rates and accumulated dose, and relaxation effects were performed on both sets of FBGs. To simulate real time conditions of a radiation dosimeter, the FBGs are examined through three consecutive radiation stages followed by limited recovery times. There is a lack of research in the areas of small recovery times and multiple periods of irradiation. The experimental regime and setup consisting of the three stages with very limited recovery comparing PCF-FBGs and standard FBGs (STD-FBGs) is unique. The experiments and gamma irradiation were conducted at ANSTO (Australian Nuclear Science and Technology Organisation) using the GATRI (Gamma Technology Research Irradiator) irradiation facility. The responses after exposure to gamma irradiation, including relaxation periods between commercially manufactured FBGs written in Germanium (Ge) doped optical fibres, with and without hydrogen loading, along with the standard SMF-28 fibre with Hydrogen are shown. The FBG inscription in PCF was completed at Interdisciplinary Photonics Laboratories (iPL), University of Sydney. The FBGs in each fibre are written by Ultraviolet (UV) low energy irradiation. In nuclear environments, when FBGs have been exposed to gamma irradiation, changes in the Bragg wavelength occur, although the exact cause or trigger is still unclear. The main outcome of this research has indicated that PCF-FBGs, compared to standard FBGs, are a strong candidate for use in the field of radiation dosimetry. This is due to their very consistent behaviour and recovery aspects after irradiation exposure. This work will compliment established research and help in the absolute quantitative comparison between the individual standard FBGs and PCF-FBGs. It will help in establishing FBGs as a possible replacement to present physical and chemical sensors currently being used as radiation dosimeters.

Subjects/Keywords: Optical fibre Bragg grating sensors; Radiation Dosimetry; Bragg wavelength shift; Photonic crystal fibre Bragg gratings; Hydrogen loaded and germanium doped optical fibre; Gamma irradiation effects; Pre-irradiation; Radiation sensitivity; Post irradiation recovery; Physics

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APA (6^th Edition):

Baccini, D. (2019). Gamma irradiation response of photonic crystal and standard optical fibre Bragg grating sensors for radiation dosimetry. (Thesis). Edith Cowan University. Retrieved from https://ro.ecu.edu.au/theses/2226

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Baccini, Desmond. “Gamma irradiation response of photonic crystal and standard optical fibre Bragg grating sensors for radiation dosimetry.” 2019. Thesis, Edith Cowan University. Accessed April 15, 2021. https://ro.ecu.edu.au/theses/2226.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Baccini, Desmond. “Gamma irradiation response of photonic crystal and standard optical fibre Bragg grating sensors for radiation dosimetry.” 2019. Web. 15 Apr 2021.

Vancouver:

Baccini D. Gamma irradiation response of photonic crystal and standard optical fibre Bragg grating sensors for radiation dosimetry. [Internet] [Thesis]. Edith Cowan University; 2019. [cited 2021 Apr 15]. Available from: https://ro.ecu.edu.au/theses/2226.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Baccini D. Gamma irradiation response of photonic crystal and standard optical fibre Bragg grating sensors for radiation dosimetry. [Thesis]. Edith Cowan University; 2019. Available from: https://ro.ecu.edu.au/theses/2226

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

23. Severy, Mark A. Comparison between aqueous- and vapor-phase reformation for thermochemical waste heat recovery of engine exhaust gas.

Degree: 2013, Humboldt State University

URL: http://hdl.handle.net/2148/1664

► Natural gas internal combustion engines release over half of the fuel???s energy as waste heat and emit pollution that harms human health and accelerates climate… (more)

▼ Natural gas internal combustion engines release over half of the fuel???s energy as waste heat and emit pollution that harms human health and accelerates climate change. Enriching natural gas with hydrogen has been shown to mitigate these impacts by reducing emissions and increasing engine efficiency. Thermal energy in the exhaust gas from natural gas engines can be used to drive chemical reactions to reform a biomass-derived feedstock into a hydrogen-rich gas. This gas can be blended with the primary fuel to enhance combustion and displace some of the natural gas demand. Two types of chemical reformation processes, aqueous-phase reformation (APR) and vapor-phase reformation (VPR), have been identified which can convert a biomass-derived sugar feedstock solution into a hydrogen-rich gas by recovering waste heat from engine exhaust gas. VPR operates at higher temperatures than APR, which limits the amount of heat that can be transferred from the exhaust gas to the reaction temperature. This study used a thermodynamic pinch analysis to compare the performance of these two processes based on their respective process heat demands and the thermal energy available from engine exhaust gas to determine how many moles of feedstock can be reformed. The calculations were performed using specifications for eight natural gas engines with reactor conditions from fourteen APR and ten VPR experiments, using glycerol as a model compound. The results predict that APR will perform better for engines with low exhaust gas temperatures, while VPR will perform better with higher exhaust gas temperatures. With exhaust gas at 873??C, VPR can convert 23% of exhaust gas waste heat into chemical energy while APR can convert 6.0%. With exhaust gas at 385??C, APR can convert 3.4% of exhaust gas waste heat into chemical energy while VPR cannot occur. At high exhaust gas temperatures, VPR is able to convert more waste heat into chemical energy than APR because the high quality heat consumed at the reaction temperature for VPR is used entirely for the heat of reaction. The heat consumed for APR at its reaction temperature is split between the heat of reaction and a heat consumed by water vaporization, thus a portion of the highest quality exhaust heat is consumed by vaporizing water. For APR, the rate at which waste heat can be utilized to reform glycerol is a strong function of reactor pressure. Higher pressures relative to the vapor pressure of water at the reaction temperature require less latent heat, and thus there is more high-quality thermal energy available for the heat of reaction. The rate of chemical energy production for VPR is a strong function of the reaction temperature, where lower reactor temperatures allow more heat to be converted into chemical energy. These results motivate future experimental work with vapor-phase reformation at low reaction temperatures and aqueous-phase reformation at high system pressures to maximize the rate of chemical energy production in this waste heat recovery system. Advisors/Committee Members: Vernon, David.

Subjects/Keywords: Recuperation; Aqueous; Thermochemical recuperation; Aqueous phase reformation; Vapor phase reformation; Waste heat recovery hydrogen enrichment; Internal combustion engine

…the waste heat recovery hydrogen enrichment system is shown in Figure 1. This system… …148 viii LIST OF FIGURES 1 Block diagram of engine-integrated hydrogen production system… …3 2 Effect of hydrogen enrichment on engine efficiency . . . . . . . . . . . . . 9 3… …as a function of temperature for hydrogen production from biomass and fossil fuels… …19 6 Hydrogen and alkane selectivity for APR of different feedstocks . . . . . . 25 7…

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APA (6^th Edition):

Severy, M. A. (2013). Comparison between aqueous- and vapor-phase reformation for thermochemical waste heat recovery of engine exhaust gas. (Thesis). Humboldt State University. Retrieved from http://hdl.handle.net/2148/1664

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Severy, Mark A. “Comparison between aqueous- and vapor-phase reformation for thermochemical waste heat recovery of engine exhaust gas.” 2013. Thesis, Humboldt State University. Accessed April 15, 2021. http://hdl.handle.net/2148/1664.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Severy, Mark A. “Comparison between aqueous- and vapor-phase reformation for thermochemical waste heat recovery of engine exhaust gas.” 2013. Web. 15 Apr 2021.

Vancouver:

Severy MA. Comparison between aqueous- and vapor-phase reformation for thermochemical waste heat recovery of engine exhaust gas. [Internet] [Thesis]. Humboldt State University; 2013. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/2148/1664.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Severy MA. Comparison between aqueous- and vapor-phase reformation for thermochemical waste heat recovery of engine exhaust gas. [Thesis]. Humboldt State University; 2013. Available from: http://hdl.handle.net/2148/1664

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations