Cyclic two step process for production of methane from carbon mo

Details Cyclic two step process for production of methane from carbon mo Cyclic two step process for production of methane from carbon mo

1979-06-04

1980-12-30

Kratz, Peter F.

Gas: heating and illuminating

Processes

Fuel mixtures

48210, 48DIG6, 166267, 252421, 260449M, 2604496M, 585733, C10K 304

Patent

active

042421039

ABSTRACT:
Carbon monoxide-containing gas streams are passed over a catalyst capable of catalyzing the disproportionation of carbon monoxide so as to deposit a surface layer of active surface carbon on the catalyst essentially without formation of inactive coke thereon. The surface layer is contacted with steam and is thus converted to methane and CO.sub.2, from which a relatively pure methane product may be obtained. Dilute carbon monoxide-containing streams, as from underground coal gasification with air or the effluent from blast furnace operations, can be used without pretreatment to convert the carbon monoxide and/or to separate inert gases therefrom. Conversion of the active surface carbon with high pressure steam enables a high pressure product methane stream to be generated without expensive compression equipment and high energy consumption. Nickel, cobalt, iron, ruthenium, rhenium and alloys thereof are preferred catalysts, with the surface area thereof being preferably at least about 10 m.sup.2 /gr. Conversion of the active surface carbon can also be accomplished by contact with hydrogen.

REFERENCES:
patent: 2686819 (1954-08-01), Johnson
patent: 3031287 (1962-04-01), Benson et al.
patent: 3988262 (1976-10-01), Andersen et al.
patent: 3988263 (1976-10-01), Hansford
patent: 4032556 (1977-06-01), Banks
"Disproportionation of CO Over Cobalt and Nickel Single Crystals", Renshaw et al., Journal of Catalysis, 22, 394-410, (1971).

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