Process for producing a gas which can be substituted for natural

Details Process for producing a gas which can be substituted for natural Process for producing a gas which can be substituted for natural

1975-07-22

1977-04-05

Mars, Howard T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260449S, 48196R, 48197R, 260449M, 2604496M, C07C 104

Patent

active

040161897

ABSTRACT:
A gas which can be substituted for natural gas is produced from a raw gas containing hydrogen and carbon oxides which is produced by the gasification of coal, tar or heavy residual oils under superatmospheric pressure. The raw gas is cooled, purified to remove catalyst poisons, particularly sulfur compounds, and then subjected to methanation and at least two stages in contact with nickel catalysts under pressures of 5-100 bars and at temperatures in the range of 200.degree.-500.degree. C. The product gas from the preceding methanation stage is reacted in the last methanation stage in contact with a catalyst which is indirectly cooled by a gas flowing in a countercurrent to the gas to be reacted.

REFERENCES:
patent: 2051774 (1936-08-01), Kleinschmidt
patent: 2301687 (1942-11-01), Dorschnel
patent: 3511624 (1970-05-01), Humphries et al.
patent: 3890113 (1975-06-01), Child et al.
patent: 3922148 (1975-11-01), Child
patent: 3928001 (1975-12-01), Child et al.

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