Production of substitute natural gas

Details Production of substitute natural gas Production of substitute natural gas

1977-05-11

1979-01-09

Bashore, S. Leon

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

48197R, C07C 2706

Patent

active

041338251

ABSTRACT:
Synthesis gases containing carbon monoxide, eg above 40% volume, and hydrogen are methanated to produce substitute natural gas, after CO.sub.2 removal, wherein the synthesis gas is simultaneously saturated with water, further heated and divided into first and second feed gas streams. The first feed gas stream is catalytically methanated at a temperature of from 250 to 550.degree. C, and the reaction product mixed with said second feed gas stream. The mixture is methanated over a second catalyst at a temperature of from 250 to 550.degree. C and the product is divided into a second product gas stream and a recycle gas stream and the recycle gas stream is admixed with the first feed gas stream, prior to the first catalytic methanation. The second product gas stream is subjected to a carbon dioxide removal process to produce SNG.

REFERENCES:
patent: 3904386 (1975-09-01), Graboski et al.
patent: 3904389 (1975-09-01), Banquy
patent: 3930812 (1976-01-01), Harris et al.
patent: 3958957 (1976-05-01), Koh et al.
patent: 3967936 (1976-07-01), Tajbl et al.
patent: 3970435 (1976-07-01), Schultz et al.
patent: 3973923 (1976-08-01), Staege et al.
patent: 4005996 (1977-02-01), Hausberger et al.

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