Hydrogen production fundamentals

P. C. Hallenbeck, J. Benemann (2002) Biological hydrogen production fundamentals and limiting processes, hit. J. Hydr. Energy., 27 1185-1193... 

P. C. Hallenbeck and J. R. Benemann, Biological hydrogen production Fundamentals and limiting processes, Int. J. Hydrogen Energy, 27 (2002) 1185-1193. 

Economic analysis of systems for electrical energy and hydrogen production fundamentals and application to two membrane reactor processes... 

FUNDAMENTALS AND LIMITING PROCESSES OF BIOLOGICAL HYDROGEN PRODUCTION... 

Fundamentals and limiting Processes of Biological Hydrogen Production... 

The sulfur-iodine thermochemical water-splitting cycle (S-1 cycle) developed for hydrogen production from water is fundamentally based on the following three chemical reactions (Wang, 2007) ... 

Recent studies have shown that unreduced Ni catalysts/ depending on the synthesis procedure, are also efficient for the hydrogen production reaction. Since most fundamental studies have been undertaken on reduced Ni catalysts (Ni°), it will be interesting to investigate methane decomposition fundamentals on unreduced Ni catalysts. 

Careful analysis of the reaction products in the HDN of the 2,6-lutidine (2,6-dimethylpyridine) and the 2,6-lupetidine (2,6-dimethylpiperidine) allowed Ledoux et al.37 to conclude that under these low pressure conditions (1 atm H2, 5-10 Torr amine, in a steady state flow system, at 300°C on Mo03/A1203 in a fixed-bed reactor) the hydrogenated product is not the intermediate for the HDN of the aromatic compound because the distributions of the products obtained by the reaction of the two amines are fundamentally different. 2,6-Lutidine gives at initial conversion 60% toluene, 21% C3 + C4 and 8% olefinic n-C7, while 2,6-lupetidine gives only 18% toluene, 4% C3 + C4 but 69% of olefinic n-C7. Under the same experimental conditions (but at 380°C), analysis of the pyridine and piperidine HDN products38 shows that... 

Hydrogen, besides reducing oxides to the metal, has important interactions with the fully reduced elemental metals it dissolves in a variety of metals to very variable extent and it affects the mechanical properties of some metals. Steel more readily undergoes brittle fracture when it is contaminated with hydrogen. From the viewpoint of application, this is important in relation to the nature of the product of a hydrogen reduction fundamentally, the phenomenon is of interest in that its mechanism seems to involve an interaction between mechanical strain and diffusion of hydrogen. 

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