scholarly journals Selection of reagent ratio for hydrogen production via Al nanopowder oxidation

2020 ◽  
Vol 1709 ◽  
pp. 012019
Author(s):  
O N Morozova ◽  
A A Pavlenko ◽  
A A Antonnikova ◽  
S S Titov
Keyword(s):  
Hydrogen Production ◽  
Reagent Ratio ◽  
Nanopowder Oxidation ◽  
Selection Of

Interval-valued probabilistic uncertain linguistic information for decision-making: selection of hydrogen production methodology

2021 ◽  
Author(s):  
R. Krishankumar ◽  
Arunodaya R. Mishra ◽  
K. S. Ravichandran ◽  
Samarjit Kar ◽  
Pankaj Gupta ◽  
...  
Keyword(s):  
Decision Making ◽  
Hydrogen Production ◽  
Linguistic Information ◽  
Interval Valued ◽  
Selection Of

Graphite Electrodes for Hydrogen Production by Acid Electrolysis

2020 ◽  
Vol 1012 ◽  
pp. 158-163
Author(s):  
Oliveira Marilei de Fátima ◽  
Mazur Viviane Teleginski ◽  
Virtuozo Fernanda ◽  
Junior Valter Anzolin de Souza
Keyword(s):  
Hydrogen Production ◽  
Fossil Fuels ◽  
High Efficiency ◽  
Low Cost ◽  
Electric Energy ◽  
Gas Production ◽  
Hydrogen Fuel Cells ◽  
Graphite Electrodes ◽  
Alkaline Electrolysis ◽  
Selection Of

Nowadays, humanity has become aware of the consequences that the use of fossil fuels entails, and the latest developments in the energy sector are leading to a diversification of energy resources. In this context, researching on alternative forms of producing electric energy is being conducted. At the transportation level, a possible solution for this matter may lie in hydrogen fuel cells. The electrolysis of water is one of the possible processes for hydrogen production, but the reaction to break the water molecule requires a great amount of energy and this is precisely the biggest issue involving this process. In this work, low cost electrodes of 254 stainless steel and electrolytic graphite were used for hydrogen production, allowing high efficiency and reduced oxidation during the process. The selection of these materials allows to obtain a high corrosion resistance electrolytic pair, by replacing the high cost platinum electrode usually employed in the alkaline electrolysis process. The formic acid of biomass origin was used as an electrolyte. It was observed that the developed reactor have no energy losses through heat and it was possible to obtain approximately 82% conversion efficiency in the gas production process.

scholarly journals Enhancing hydrogen production from steam electrolysis in molten hydroxides via selection of non-precious metal electrodes

2020 ◽  
Vol 45 (53) ◽  
pp. 28260-28271 ◽  
Author(s):  
Farooq Sher ◽  
Nawar K. Al-Shara ◽  
Sania Z. Iqbal ◽  
Zaib Jahan ◽  
George Z. Chen
Keyword(s):  
Hydrogen Production ◽  
Precious Metal ◽  
Metal Electrodes ◽  
Molten Hydroxides ◽  
Selection Of

Study on Thermochemical Iodine-Sulfur Cycle at JAERI

2004 ◽  
Author(s):  
Kaoru Onuki ◽  
Shinji Kubo ◽  
Seiji Kasahara ◽  
Shintaro Ishiyama ◽  
Hayato Nakajima ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Process Improvement ◽  
Large Scale ◽  
Sulfur Cycle ◽  
Side Reactions ◽  
Operation Technique ◽  
Energy Research ◽  
Promising Candidate ◽  
Representative Process ◽  
Selection Of

Japan Atomic Energy Research Institute (JAERI) has been conducting an R&D on thermochemical water-splitting processes of Iodine-Sulfur family, which is a promising candidate of heat-utilization process of High Temperature Gas-cooled Reactors. Present activity at JAERI covers the following three subjects, (a) closed-loop operation technique for stable and continuous hydrogen production by e.g. suppressing possible side reactions, (b) process improvement in terms of thermal efficiency of hydrogen production utilizing membrane technologies, and (c) selection of materials for constructing the large-scale plant mainly focusing on corrosion resistance in the representative process environments. Recent progress on these studies is briefly described.

Microbial community composition and reactor performance during hydrogen production in a UASB reactor fed with raw cheese whey inoculated with compost

2011 ◽  
Vol 64 (11) ◽  
pp. 2265-2273 ◽  
Author(s):  
E. Castelló ◽  
V. Perna ◽  
J. Wenzel ◽  
L. Borzacconi ◽  
C. Etchebehere
Keyword(s):  
Microbial Community ◽  
Hydrogen Production ◽  
Cheese Whey ◽  
Microbial Community Composition ◽  
Uasb Reactor ◽  
Hydrogen Yield ◽  
Reactor Performance ◽  
Loading Rates ◽  
Streptococcus A ◽  
Selection Of

This study investigated the microbial community developed in a UASB reactor for hydrogen production and correlated it to reactor performance. The reactor was inoculated with kitchen waste compost and fed with raw cheese whey at two organic loading rates, 20 gCOD/Ld and 30 gCOD/Ld. Hydrogen production was very variable, using an OLR of 30 gCOD/Ld averaged 1.0 LH2/Ld with no methane produced under these conditions. The hydrogen yield was also very variable and far from the theoretical. This low yield could be explained by selection of a mixed fermentative population with presence of hydrogen producing organisms (Clostridium, Ruminococcus and Enterobacter) and other non-hydrogen producing fermenters (Lactobacillus, Dialister and Prevotella). The molecular analysis of the raw cheese whey used for feeding revealed the presence of three predominant organisms that are affiliated with the genera Buttiauxella (a low-yield hydrogen producer) and Streptococcus (a lactic acid-producing fermenter). Although these organisms did not persist in the reactor, the continuous addition of these fermenters could decrease the reactor's hydrogen yield.

Selection of appropriate primary fuel for hydrogen production for different fuel cell types: Comparison between decomposition and steam reforming

2011 ◽  
Vol 36 (13) ◽  
pp. 7696-7706 ◽  
Author(s):  
W. Khaodee ◽  
S. Wongsakulphasatch ◽  
W. Kiatkittipong ◽  
A. Arpornwichanop ◽  
N. Laosiripojana ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Steam Reforming ◽  
Cell Types ◽  
Selection Of
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