C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/315
C01B 3/48 (2006.01) C01B 3/16 (2006.01) C01B 3/56 (2006.01)
Patent
CA 1301431
211-P-US03434 ABSTRACT OF THE DISCLOSURE High yields of hydrogen of high purity are obtained from a methane- rich gas stream, such as natural gas, by a particular combination of op- erations wherein the methane-rich gas undergoes primary steam reforming under less severe operating conditions including lower steam to carbon ratio, supplemented by secondary reforming with oxygen, the obtained hydrogen is separated from accompanying carbon dioxide in the reformer effluent by a special five step pressure swing adsorption sequence having the steps of selective CO2 adsorption at superatmospheric pressure, rinsing with desorbed carbon dioxide, depressuring and then evacuating without additional rinsing, followed by repressuring the bed with part of the recovered pure hydrogen.
563700
Koch William R.
Wang Shoou-I
Air Products And Chemicals Inc.
Koch William R.
Mcfadden Fincham
Wang Shoou-I
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