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

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.

Inventors:
Issue Date:
OSTI Identifier:
6579223
Assignee:
Dept. of Energy TIC; ERA-06-016597; EDB-81-050033
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; HYDROGEN PRODUCTION; THERMOCHEMICAL PROCESSES; CARBON DIOXIDE; CARBON MONOXIDE; CERIUM OXIDES; PRODUCTION; SODIUM COMPOUNDS; TITANATES; TITANIUM OXIDES; WATER; ALKALI METAL COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CERIUM COMPOUNDS; CHALCOGENIDES; HYDROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS 080102* -- Hydrogen-- Production-- Thermochemical Processes

Citation Formats

Bamberger, C.E. Thermochemical cyclic system for decomposing H/sub 2/O and/or CO/sub 2/ by means of cerium-titanium-sodium-oxygen compounds. United States: N. p., 1980. Web.
Bamberger, C.E. Thermochemical cyclic system for decomposing H/sub 2/O and/or CO/sub 2/ by means of cerium-titanium-sodium-oxygen compounds. United States.
Bamberger, C.E. Thu . "Thermochemical cyclic system for decomposing H/sub 2/O and/or CO/sub 2/ by means of cerium-titanium-sodium-oxygen compounds". United States.
@article{osti_6579223,
title = {Thermochemical cyclic system for decomposing H/sub 2/O and/or CO/sub 2/ by means of cerium-titanium-sodium-oxygen compounds},
author = {Bamberger, C.E.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {4}
}