Thermochemical cyclic system for decomposing H.sub.2 O and/or CO

Details Thermochemical cyclic system for decomposing H.sub.2 O and/or CO Thermochemical cyclic system for decomposing H.sub.2 O and/or CO

1980-04-24

1982-02-02

Peters, G. O.

Chemistry of inorganic compounds

Rare earth compound

423415A, 423579, 423648R, C01B 304, C01G 2300

Patent

active

043139256

ABSTRACT:
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.

REFERENCES:
patent: 4230682 (1980-10-01), Bamberger
patent: 4237105 (1980-12-01), Bamberger et al.
Chem. Abst. vol. 66, 1967; p. 8741g.
Roy, R. "Journ. Am. Ceram. Soc.", vol. 37, 12/1954; pp. 581-584.

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