High-temperature fuel cells with oxygen-enriched gas

Details High-temperature fuel cells with oxygen-enriched gas High-temperature fuel cells with oxygen-enriched gas

1990-04-25

1992-12-29

Chaudhuri, Olik

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 17, 429 19, 429 20, H01M 806

Patent

active

051750619

ABSTRACT:
In high-temperature fuel cells based on an ion-conducting electrolyte, wherein hydrogen and oxygen are converted into water, the cathode of the fuel cell is supplied with oxygen-enriched gas from an air separator, preferably a cryogenic air separator. This oxygen-enriched gas is supplied together with a CO.sub.2 -containing gas in a stoichiometric O.sub.2 /CO.sub.2 ratio.
For the recovery of the O.sub.2 and CO.sub.2 components, a partial stream of the cathode outlet gas is recycled; for this purpose, the cathode outlet gas, used for regulating the fuel cell temperature, is cooled with production and/or superheating of steam and recompressed by means of a hot gas blower or a hot gas compressor.

REFERENCES:
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patent: 4595642 (1986-06-01), Nakanishi et al.
patent: 4792502 (1988-12-01), Trocciola
patent: 4921765 (1990-05-01), Gmeindl et al.
James A. Kent, editor, Riegel's Handbook of Industrial Chemistry, Seventh Edition, Van Nostrand and Reinhold Company, New York, 1974, p. 521.
Springmann, H., "Oxygen Enrichment of Air in Combustion and Gasification Processes", Linde Reports on Science and Technology, 34/1982, pp. 54-63.
Koch, H., "Auslegung von Heissgas-Umwalzventiltoren", Fachberichte Huttenpraxis, Mettallweiter-Weiterverarbeitung, 22 (1984), No. 3, 188-195.

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