Combined goal gasifier and fuel cell system and method

Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature

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429 17, 429 20, H01M 806

Patent

active

049217658

ABSTRACT:
A molten carbonate fuel cell is combined with a catalytic coal or coal char gasifier for providing the reactant gases comprising hydrogen, carbon monoxide and carbon dioxide used in the operation of the fuel cell. These reactant gases are stripped of sulfur compounds and particulate material and are then separated in discrete gas streams for conveyance to appropriate electrodes in the fuel cell. The gasifier is arranged to receive the reaction products generated at the anode of the fuel cell by the electricity-producing electrochemical reaction therein. These reaction products from the anode are formed primarily of high temperature steam and carbon dioxide to provide the steam, the atmosphere and the heat necessary to endothermically pyrolyze the coal or char in the presence of a catalyst. The reaction products generated at the cathode are substantially formed of carbon dioxide which is used to heat air being admixed with the carbon dioxide stream from the gasifier for providing the oxygen required for the reaction in the fuel cell and for driving an expansion device for energy recovery. A portion of this carbon dioxide from the cathode may be recycled into the fuel cell with the air-carbon dioxide mixture.

REFERENCES:
patent: 4128700 (1978-12-01), Sederquist
patent: 4304823 (1981-12-01), Lemelson
patent: 4622275 (1986-11-01), Noguchi et al.
patent: 4738903 (1988-04-01), Garow et al.
patent: 4865926 (1989-09-01), Levy et al.
Analysis of Fuel Cell and Competing Power Plant Designs for Utility Base-Load Applications, Argonne National Laboratory, Argonne, Ill., Nov. 1985.

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