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.
Results
Showing 1 to 13 of 13 for “"Hydrogen purification"”.
-
Palladium, yttrium, copper ternary alloys for hydrogen purification
Palladium has long been recognised for its hydrogen sorption and separation capabilities. Alloying with different metals to produce binary alloys has been shown to further improve many of its essential properties significantly. Currently palladium-silver alloys are used commercially for the …
-
Development of cost effective materials for use as hydrogen purification membranes
The demand for hydrogen is currently over 50 million tons/year and ever increasing due to its role as a critical reagent in petrochemical refining with a possibly larger future as an energy carrier in a hydrogen economy. Greater than 95% of H2 is produced through steam reforming of hydrocarbons, …
-
First-principles approach to screening multi-component metal alloys for hydrogen purification membranes
Metal membranes play a vital role in hydrogen purification. Defect-free membranes can exhibit effectively infinite selectivity for hydrogen. Membranes must meet multiple objectives, including providing high fluxes, resistance to poisoning, long operational standards, and be cost effective. Alloys …
-
Studies Directed to the Development of Long Lived Palladium Membranes for Hydrogen Purification
<p>The focus of this study was to systematically investigate the variables involved in electroless deposition of palladium and palladium alloy membranes on a known porous stainless steel substrate, and apply the results to a new and novel porous stainless steel substrate. Different oxide pore and …
-
Studies Directed to the Development of Long Lived Palladium Membranes for Hydrogen Purification
<p>The focus of this study was to systematically investigate the variables involved in electroless deposition of palladium and palladium alloy membranes on a known porous stainless steel substrate, and apply the results to a new and novel porous stainless steel substrate. Different oxide pore and …
-
Caratterizzazione di membrane inorganiche per la separazione di idrogeno da gas di reforming
… characterisation of inorganic membranes for the hydrogen purification from steam reforming gas. Composite membranes based on porous inorganic supports coated with palladium silver alloys and ceramic membranes have been analysed. A brief resume of theoretical laws governing transport of gases …
-
Water-gas shift conversion in microchannel reactors using noble metal catalysts
… transient conditions.The feed for PEMFCs is hydrogen. For small scale stationary and mobile applications, the hydrogen, typically, has to be produced on-site from other energy sources, such as fossil fuels or fuel from renewable sources. At present, the most favourable approach appears to be …
-
Optimizing energy conversion efficiency of a proton exchange membrane green hydrogen generation system while incorporating balance of plant modeling
Hydrogen has the potential to decarbonize several difficult to decarbonize sectors of the U.S. energy economy such as medium- and heavy-duty transportation, energy storage, and industrial processes such as steel making. Currently most of the hydrogen produced globally is produced with steam methane …
-
Caratterizzazione di membrane metalliche e ionomeriche per applicazioni energetiche
… characterization of metallic membranes for the hydrogen purification from steam reforming process and also of perfluorosulphonic acid ionomeric (PFSI) membranes suitable as electrolytes in fuel cell applications. The experimental study of metallic membranes was divided in three sections: …
-
Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming
… of catalytic membrane reactors for high- purity hydrogen extraction from bioethanol reforming. Conventional membrane systems employ hydrogen permselective materials such as palladium, polymer membranes, which present several material challenges including embrittlement, thermal degradation and …
-
Mesostructured metal oxide-based nanocomposites as sorbents for H2S removal from syngas coal gasification
… H2S removal in view of possible applications in hydrogen purification, air pollution control, and deep desulphurization of fossil fuels. It is precisely in the latter topic that the research project was born. The production of power, fuels and chemicals in most countries is predominantly based on …
-
INNOVATION AND OPTIMIZATION OF THE HYDROGEN TRANSPORT AND DISTRIBUTION CHAIN AS A GREEN AND RENEWABLE ENERGY VECTOR
Because of its enormous energy storage capacity, hydrogen appears to play a significant role in a world where fossil fuel depletion, global warming, and growing energy consumption are the main factors. However, issues with storage and transportation restrict its application. The aim of this thesis, …