Method of producing a methane-rich gas mixture from mine gas

Details Method of producing a methane-rich gas mixture from mine gas Method of producing a methane-rich gas mixture from mine gas

1984-02-22

1985-06-04

Kratz, Peter

Gas: heating and illuminating

Processes

Hydrogen

48197R, 55 25, 55 62, 166267, C10K 300

Patent

active

045212210

ABSTRACT:
A pressure-swing adsorption system is used to enrich the methane content of mine gas obtained from bores around mine shafts or galleries from the customary 25 to 45% by volume to a product gas quality of 50% by volume. Using a carbon molecular sieve adsorbent, the adsorption is carried out at 5 to 8 bar and is followed by a uniflow expansion to an intermediate pressure and a counterflow expansion to a flushing pressure of 1.1 to 2 bar. Counterflow flushing is carried out with waste gas and the product gas is a mixture of the gases obtained by counterflow expansion and flushing.

REFERENCES:
patent: 3164454 (1965-01-01), Wilson
patent: 4305734 (1981-12-01), McGill
patent: 4475929 (1984-10-01), Fuderer

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