(under subclass 400) Subject matter having a step wherein hydrogen contained in water is converted to free hydrogen.
(1) Note. The water may be in any form, e.g., steam, water of hydration, etc.
(2) Note. Often the water is contacted at an elevated temperature with CO or the coke or char formed by pyrolysis of part or all of the solid feedstock.
SEE OR SEARCH CLASS
48, Gas: Heating and Illuminating,
204+, for a process of making a so-called "water gas" mixture.
423, Chemistry of Inorganic Compounds, 647.7, for a process, per se, of making elemental hydrogen.
