Fluidized bed catalytic coal gasification process

Gas: heating and illuminating – Processes – Fuel mixtures

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48202, 48210, C10J 354

Patent

active

044327730

ABSTRACT:
Coal or similar carbonaceous solids impregnated with gasification catalyst constituents (16) are oxidized by contact with a gas containing between 2 volume percent and 21 volume percent oxygen at a temperature between 50.degree. C. and 250.degree. C. in an oxidation zone (24) and the resultant oxidized, catalyst impregnated solids are then gasified in a fluidized bed gasification zone (44) at an elevated pressure. The oxidation of the catalyst impregnated solids under these conditions insures that the bed density in the fluidized bed gasification zone will be relatively high even though the solids are gasified at elevated pressure and temperature.

REFERENCES:
patent: 3615299 (1971-10-01), Fischer et al.
patent: 3884647 (1975-05-01), Nakaguchi
patent: 3970434 (1976-07-01), Gasior et al.
patent: 4057402 (1977-11-01), Patel et al.
patent: 4094650 (1978-06-01), Koh et al.
patent: 4224038 (1980-09-01), Misologites et al.
patent: 4234319 (1980-11-01), Beeson
patent: 4251227 (1981-02-01), Othmer
patent: 4304571 (1981-12-01), McMahon
Kam et al., "The Oxidation of Bituminous Coal, 3 Effecton Coking Properties", Ind. Erg. Chem. Process Des. Dev., vol. 15, No. 3, 1976, pp. 416-422.
Crewe et al., "Decaking of Bituminous Coals by Alkaline Solutions", Fuel, vol. 54, Jan. 1975, pp. 20-23.
Euker et al., Catalytic Coal Gasification Process Development Unit Operation, 90th A.I.C.H.E. Meeting, Apr. 1981.

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