Hydrogen Production Technologies: Current State and Future Developments release_64c7njxh7jgcljfgb6dygq6uba

by Christos M. Kalamaras, Angelos M. Efstathiou

Published in Conference Papers in Energy by Hindawi Limited.

2013   Volume 2013, p1-9

Abstract

Hydrogen (H<jats:sub>2</jats:sub>) is currently used mainly in the chemical industry for the production of ammonia and methanol. Nevertheless, in the near future, hydrogen is expected to become a significant fuel that will largely contribute to the quality of atmospheric air. Hydrogen as a chemical element (H) is the most widespread one on the earth and as molecular dihydrogen (H<jats:sub>2</jats:sub>) can be obtained from a number of sources both renewable and nonrenewable by various processes. Hydrogen global production has so far been dominated by fossil fuels, with the most significant contemporary technologies being the steam reforming of hydrocarbons (e.g., natural gas). Pure hydrogen is also produced by electrolysis of water, an energy demanding process. This work reviews the current technologies used for hydrogen (H<jats:sub>2</jats:sub>) production from both fossil and renewable biomass resources, including reforming (steam, partial oxidation, autothermal, plasma, and aqueous phase) and pyrolysis. In addition, other methods for generating hydrogen (e.g., electrolysis of water) and purification methods, such as desulfurization and water-gas shift reactions are discussed.
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