Process for the thermochemical production of hydrogen

Details Process for the thermochemical production of hydrogen Process for the thermochemical production of hydrogen

1977-04-08

1978-05-16

Stern, Edward

Chemistry of inorganic compounds

Hydrogen or compound thereof

Elemental hydrogen

423481, 423500, 423522, 423539, 423579, C01B 102, C01B 718, C01B 714, C01B 714, C01B 1774

Patent

active

040899403

ABSTRACT:
Hydrogen is thermochemically produced from water in a cycle wherein a first reaction produces hydrogen iodide and H.sub.2 SO.sub.4 by the reaction of iodine, sulfur dioxide and water under conditions which cause two distinct aqueous phases to be formed, i.e., a lighter sulfuric acid-bearing phase and a heavier hydrogen iodide-bearing phase. After separation of the two phases, the heavier phase containing most of the hydrogen iodide is treated, e.g., at a high temperature, to decompose the hydrogen iodide and recover hydrogen and iodine. The H.sub.2 SO.sub.4 is pyrolyzed to recover sulfur dioxide and produce oxygen.

REFERENCES:
patent: 2143222 (1939-01-01), Heath
patent: 2406930 (1946-09-01), Titlestad
patent: 3365276 (1968-01-01), Childs et al.
patent: 3888750 (1975-06-01), Brecher et al.
patent: 3929980 (1975-12-01), Abraham et al.
Mellor's Comp. Treatise on Inorg. and Theo. Chem., Supp. II, Part I, 1956 Ed., p. 865, Longmans, Green & Co., N. Y.
Jacobson's "Encyclopedia of Chem. Reactions", vol. 3, 1949 Ed., p. 709, Reinhold Pub. Corp., N. Y.

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