Hydrogen production by biological processes

D. Das and T. Nejat Veziroglu, Hydrogen Production by Biological processes a Survey of Literature , Int. J. Hydrogen Energy, 2001, 26, 13. 

Das D, Veziroglu IN (2001) Hydrogen production by biological processes a survey of literature. Int J Hydrogen Energy 26 13-28... 

Two basic avenues for molecular hydrogen production by biological processes are currently being considered ... 

Gaseous sulfur compounds produced in wetlands are either intermediate metabolites or end products of biological processes. Hydrogen sulfide (H2S) produced by dissimilatory sulfate reduction in anaerobic environment was originally thought to be the primary gaseous sulfur source emitted to the atmosphere (Rodhe and Isaken, 1980). 

Other processes explored, but not commercialized, include the direct nitric acid oxidation of cyclohexane to adipic acid (140—143), carbonylation of 1,4-butanediol [110-63-4] (144), and oxidation of cyclohexane with ozone [10028-15-5] (145—148) or hydrogen peroxide [7722-84-1] (149—150). Production of adipic acid as a by-product of biological reactions has been explored in recent years (151—156). 

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