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 cylic 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.
- Assignee:
- Department of Energy
- Patent Number(s):
- US 4237105
- OSTI ID:
- 6603854
- Resource Relation:
- Patent File Date: Filed date 20 Jun 1979; Other Information: PAT-APPL-050379
- 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
HYDROGEN PRODUCTION
THERMOCHEMICAL PROCESSES
WATER GAS PROCESSES
ALKALI METAL COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CERIUM OXIDES
WATER
CARBON COMPOUNDS
CARBON OXIDES
CERIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
HYDROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
080102* - Hydrogen- Production- Thermochemical Processes
080104 - Hydrogen- Production- Water Gas Processes