Thermochemical cyclic system for decomposing H2O and/or CO2 by means of cerium-titanium-sodium-oxygen compounds

Patent · Tue Feb 02 00:00:00 EST 1982

OSTI ID:5375212

Bamberger, C E

A thermochemical closed cyclic process for the decomposition of water and/or carbon dioxide to hydrogen and/or carbon monoxide begins with the reaction of ceric oxide (CeO2), titanium dioxide (TiO2) and sodium titanate (Na2TiO3) to form sodium cerous titanate (NaCeTi2O6) and oxygen. Sodium cerous titanate (NaCeTi2O6) reacted with sodium carbonate (Na2CO3) in the presence of steam, produces hydrogen. The same reaction, in the absence of steam, produces carbon monoxide. The products, ceric oxide and sodium titanate, obtained in either case, are treated with carbon dioxide and water to produce ceric oxide, titanium dioxide, sodium titanate, and sodium bicarbonate. After dissolving sodium bicarbonate from the mixture in water, the remaining insoluble compounds are used as starting materials for a subsequent cycle. The sodium bicarbonate can be converted to sodium carbonate by heating and returned to the cycle.

• Assignee: Dept. Of Energy
• Patent Number(s): US 4313925
• OSTI ID: 5375212
• Resource Relation: Patent File Date: Filed date 24 Apr 1980; Other Information: PAT-APPL-143253
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
HYDROGEN PRODUCTION
THERMOCHEMICAL PROCESSES
CARBON DIOXIDE
CARBON MONOXIDE
CERIUM
CERIUM OXIDES
CHEMICAL REACTIONS
DECOMPOSITION
RECYCLING
SODIUM COMPOUNDS
TITANATES
TITANIUM OXIDES
WATER
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CERIUM COMPOUNDS
CHALCOGENIDES
ELEMENTS
HYDROGEN COMPOUNDS
METALS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
RARE EARTHS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
080102* - Hydrogen- Production- Thermochemical Processes