Process for producing methane from gas streams containing carbon

Details Process for producing methane from gas streams containing carbon Process for producing methane from gas streams containing carbon

1979-10-10

1980-12-30

Kratz, Peter F.

Gas: heating and illuminating

Processes

Fuel mixtures

260449M, 2604496M, 423248, 585733, C10K 304

Patent

active

042421055

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. While carbon monoxide-containing gas streams having hydrogen or water present therein can be used only the carbon monoxide available after reaction with said hydrogen or water is decomposed to form said active surface carbon. Although hydrogen or water will be converted, partially or completely, to methane that can be utilized in a combustion zone to generate heat for steam production or other energy recovery purposes, said hydrogen is selectively removed from a CO--H.sub.2 -containing feed stream by partial oxidation thereof prior to disproportionation of the CO content of said stream.

REFERENCES:
patent: 1911780 (1933-05-01), White et al.
patent: 2686819 (1954-08-01), Johnson
patent: 3031287 (1962-04-01), Benson et al.
Lewis et al., "Combustion, Flames and Explosions of Gases", pp. 3-89, Academic Press, N. Y., San Francisco, London, Second Ed., 1961, pp. 24 and 53.
Buckler et al., Proc. Roy. Soc. (London) A 167, 292, 320 (1938).

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