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In the green Hydrogen Economy, there are two important ways of production:  (Source: Wikimedia) | On the one hand there is the high-pressure electrolysis, which is only powered by renewable energy. In this process water (H2O ) is cleaved into hydrogen(H2) and oxygen(O2) under high pressure . The attained efficiency is up to 85%. |  small biomass steam reformer in Güssing near Wien (Source: http://www.bio-wasserstoff.de/h2) | On the other hand, there is the thermo-chemical process of biomass gasification. This process is similar to the gasification of coal, which was used to produce town gas in past decades. In this process, the hydrocarbons contained in the biomass are cleaved and automatically become gaseuos. The reaction of the carbons and oxygen releases energy which then activates the thermal cleavage of water. Because of its low costs, this method of hydrogen production will probably be the more commonly used. It's degree of efficiency is about 78%. |
Both processes have high efficiencies and the hydrogen is already under pressure.
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