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Title: Process for the thermochemical production of hydrogen

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.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [2]
  1. (La Jolla, CA)
  2. (Del Mar, CA)
  3. (Cardiff, CA)
Publication Date:
OSTI Identifier:
863086
Report Number(s):
US 4089940
DOE Contract Number:
AC02-80ET26225
Resource Type:
Patent
Research Org:
GENERAL ATOMICS
Country of Publication:
United States
Language:
English
Subject:
process; thermochemical; production; hydrogen; hydrogen; thermochemically; produced; water; cycle; reaction; produces; hydrogen; iodide; reaction; iodine; sulfur; dioxide; water; conditions; distinct; aqueous; phases; formed; lighter; sulfuric; acid-bearing; phase; heavier; hydrogen; iodide-bearing; phase; separation; phases; heavier; phase; containing; hydrogen; iodide; treated; temperature; decompose; hydrogen; iodide; recover; hydrogen; iodine; pyrolyzed; recover; sulfur; dioxide; produce; oxygen; phase containing; sulfuric acid; sulfur dioxide; sulfur dioxide; aqueous phase; hydrogen iodide; hydrogen iodide; hydrogen iodide; hydrogen iodide; recover hydrogen; produces hydrogen; thermochemical production; reaction produces; chemical product /423/