Thermochemical cyclic system for decomposing H/sub 2/O and/or CO/sub 2/ by means of cerium-titanium-sodium-oxygen compounds

Patent · Thu Apr 24 04:00:00 EST 1980

OSTI ID:6579223

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 (CeO/sub 2/), titanium dioxide (TiO/sub 2/) and sodium titanate (Na/sub 2/TiO/sub 3/) to form sodium cerous titanate (NaCeTi/sub 2/O/sub 6/) and oxygen. Sodium cerous titanate (NaCeTi/sub 2/O/sub 6/) reacted with sodium carbonate (Na/sub 2/CO/sub 3/) 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.

• DOE Contract Number: W-7405-ENG-26
• Assignee: Dept. of Energy
• Patent Number(s): None
• OSTI ID: 6579223
• Country of Publication: United States
• Language: English

Related Subjects

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