Process for the production of hydrogen from water. [sulfur-iodine cycle]
Hydrogen is produced from water by reacting I/sub 2/, SO/sub 2/ and H/sub 2/O to make hydrogen iodide and sulfuric acid. SO/sub 2/ is present in a substantial molar excess with respect to the available H/sub 2/O and I/sub 2/ is also present in excess to cause the formation of a lighter sulfuric acid-bearing phase and a heavier hydrogen iodide-bearing phase. The heavier phase is separated from the lighter phase, degassed to remove SO/sub 2/ and then treated with additional HI and I/sub 2/ to cause the formation of a light immiscible fraction containing sulfuric acid and water which is removed to substantially reduce the sulfur content of the degassed phase. Finally, the hydrogen iodide product is separated and decomposed to produce hydrogen.
- Assignee:
- General Atomic Co.
- Patent Number(s):
- US 4089939
- OSTI ID:
- 6706483
- Country of Publication:
- United States
- Language:
- English
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Process for the thermochemical production of hydrogen
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Related Subjects
080102* -- Hydrogen-- Production-- Thermochemical Processes
CHALCOGENIDES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
HALOGENS
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
IODINE
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PRODUCTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WATER