Patent ID: 7306651

Claim:
A method which may be used for treating a gas mixture at an initial pressure, wherein said gas mixture comprises H 2 S and H 2 , comprising treating said gas mixture with a treatment device, wherein said device comprises a pressure swing adsorption (PSA) unit with an integrated compressor and wherein each adsorber of said unit comprises a pressure swing cycle, wherein said cycle comprises: a) an adsorption phase, wherein said adsorption phase comprises: 1) contacting said gas mixture with the adsorber bed so as to adsorb the different components of said gas mixture; and 2) producing at the top of said bed, a gas consisting essentially of hydrogen; b) a decompression phase, wherein said decompression phase comprises: 1) introducing a recycle gas to said bed, wherein said recycle gas is compressed by said compressor to a second pressure which is less than said initial pressure; and 2) producing a PSA waste gas; c) a purge phase, wherein said purge phase comprises producing a purge gas; and d) a repressurization phase.