Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 88 for “"gas diffusion"”.
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A basic study of gas diffusion in foam insulation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
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Engineering gas diffusion electrodes for electrochemical carbon dioxide upgrading
Electrochemical carbon dioxide reduction (CO2R) is increasingly recognized as a viable technology for the generation of chemicals using carbon dioxide (CO₂) recovered from industrial exhaust streams or directly captured from air. If powered with low-carbon electricity, CO2R processes have the …
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Gas diffusion electrodes and operating conditions for electrochemical energy storage applications
… and indicates that the direct use of flue gas as a feed for electroreduction of CO2 has promise. This dissertation also reports a detailed investigation of the relationship between the physical structure of electrodes and electrochemical activity (Chapter 3) as well as further improvement …
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Multiscale modelling of CO₂ Electroreduction on Cu - based gas diffusion electrodes (GDEs)
… by water and renewable energy (solar and wind). Gas diffusion electrodes (GDEs) are an important component of the electrochemical cell employed to conduct this reaction. Compared to other electrocatalysts used for CO₂RR, copper electrocatalysts have the advantage of producing several products in …
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Bio-engineered gas diffusion electrodes (GDEs) for proton exchange membrane fuel cells (PEMFCs)
… incorporation of biohydrometallurgy in producing Gas Diffusion Electrodes (GDEs) for PEM Fuel cell applications. The biomineralisation and subsequent catalytic activity of spin coated engineered biofilms is investigated, as is the use of planktonic cell generated bio-catalysts in traditional GDE …
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Durability and degradation of gas diffusion electrodes for the electroreduction of CO2 to fuels
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
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Investigation of Novel Gas Diffusion Media for Application in Pem Fuel Cell Ribbon Assemblies
… The fuel cell ribbon architecture relies on the gas diffusion layer (GDL) to conduct electrical current in-plane to adjacent cells or collector terminals. The potential advantages of the fuel cell ribbon architecture with respect to conventional fuel cell stacks include reduced manufacturing …
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Gas diffusion transport characteristics and mathematical description of membrane systems with application for biogas upgrading.
Greenhouse gas emissions (GHGs) and their effects have been a matter of global concern over the past decade. With growing energy demands to support developing economies, there has been a challenge of harnessing and utilizing renewable energy to meet these demands. However, despite the effect of …
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Porous titanium felts as alternative metal gas diffusion layers for low temperature PEM fuel cells
… production. A key component of the PEMFC is the gas diffusion layer (GDL) which facilitates reactant transport and water management within the cell. The GDL is conventionally carbon-based which makes it susceptible to degradation during operation within the oxidative environment of the PEMFC. …
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PAH and soot formation and interconversion in turbulent coal liquid and natural gas diffusion flames
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1984.
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Electrochemical conversion of CO2 on Gas Diffusion Electrodes: bridging the gap between research and industrial application
L'abstract è presente nell'allegato / the abstract is in the attachment
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Investigation of Water Transport Parameters and Processes in the Gas Diffusion Layer of PEM Fuel Cells
… the water transport characteristics of the gas diffusion layer (GDL) of proton exchange membrane fuel cells (PEMFCs). Additionally, experimental fixtures and procedures for the determination of the constitutive relationships are presented. The water transport relationships are incorporated …
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Growth and use of Carbon Nanotube Nanoforests as Gas Diffusion Layers in Industrial-Scale Proton Exchange Membrane Fuel Cells
… a variety of factors including cell temperature, gas flow rates, reactant humidification, and water management. Water management is especially challenging involving a fine balance between adequate humidification for conductivity and flooding due to excess water. Gas diffusion layers are a …
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Interfacial Transport Phenomena of the Non-Wetting Phase in Porous Media: Applied to Polymer Electrolyte Fuel Cell Gas Diffusion Media
… experiments applied to water transport in the gas diffusion layer of polymer electrolyte fuel cells (PEFCs). </p> <p>Evidence of a region of gradual property change between the microporous layer and macroporous layer of bi-layer diffusion media is presented, and a mathematical model describing …
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A comprehensive fractal approach in determination of the effective thermal conductivity of gas diffusion layers in polymer electrolyte membrane fuel cells
… of the effectiveness thermal conductivity of gas diffusion layers (GDL) used in polymer electrolyte membrane fuel cells (PEMFC‟s). This is one of the factors affecting the durability of a fuel cell and need to get a solution to minimize costs and optimize the use of electrodes and cells. The …
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Emerging Electrochemical Technologies: Advanced Engineering Design
… methods in the chemical industry, and (b) gas diffusion electrolysers used in various emerging industrial applications that deal with gaseous reactants. The study uses a combination of analytical solutions and numerical simulations to shed light on the underlying physical and chemical …
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