Thermochemical cyclic system for splitting water and/or carbon dioxide by means of cerium compounds and reactions useful therein
A thermochemical cyclic process for producing hydrogen from water comprises reacting ceric oxide with monobasic or dibasic alkali metal phosphate to yield a solid reaction product, oxygen and water. The solid reaction product, alkali metal carbonate or bicarbonate, and water, are reacted to yield hydrogen, ceric oxide, carbon dioxide and trialkali metal phosphate. Ceric oxide is recycled. Trialkali metal phosphate, carbon dioxide and water are reacted to yield monobasic or dibasic alkali metal phosphate and alkali metal bicarbonate, which are recycled. The cyclic process can be modified for producing carbon monoxide from carbon dioxide by reacting the alkali metal cerous phosphate and alkali metal carbonate or bicarbonate in the absence of water to produce carbon monoxide, ceric oxide, carbon dioxide and trialkali metal phosphate. Carbon monoxide can be converted to hydrogen by the water gas shift reaction.
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- TIC; EDB-80-065000; ERA-05-023769
- Patent Number(s):
- None
- OSTI ID:
- 5497598
- Country of Publication:
- United States
- Language:
- English
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Thermochemical cyclic system for splitting water and/or carbon dioxide by means of cerium compounds and reactions useful therein
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Related Subjects
080102* -- Hydrogen-- Production-- Thermochemical Processes
ALKALI METAL COMPOUNDS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PRODUCTION
RARE EARTH COMPOUNDS
THERMOCHEMICAL PROCESSES
WATER