Method for controlling H.sub.2 /CO ratio of in-situ coal gasific

Details Method for controlling H.sub.2 /CO ratio of in-situ coal gasific Method for controlling H.sub.2 /CO ratio of in-situ coal gasific

1982-03-31

1984-10-16

Novosad, Stephen J.

Wells

Processes

In situ combustion

166272, 166266, 166267, 48DIG6, E21B 4324

Patent

active

044769270

ABSTRACT:
A method for in-situ coal gasification to recover a product gas having a predetermined H.sub.2 /CO ratio by introducing controlled amounts of carbon dioxide recovered from the product gas along with steam and oxygen injected into the coal deposits. The H.sub.2 /CO ratio of the product gas is preferably maintained within the range of 1.5 to 4.0.

REFERENCES:
patent: 3770398 (1973-11-01), Abraham et al.
patent: 3892270 (1975-07-01), Lindquist
patent: 4197911 (1980-04-01), Anada
patent: 4250230 (1981-02-01), Terry

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