B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/04 (2006.01) B01D 53/22 (2006.01) C01B 3/50 (2006.01) C01B 3/56 (2006.01)
Patent
CA 2138206
ABSTRACT Recovery of hydrogen from hydrogen-containing gas mixtures by pressure swing adsorption is increased by utilizing an adsorbent membrane to concentrate hydrogen in the pressure swing adsorption reject gas and recycling the resulting hydrogen- enriched stream to the feed of the pressure swing adsorption system. Lower compression requirements are realized compared with the use of polymeric membranes for the same service because the hydrogen-enriched stream is recovered from the adsorbent membrane as non-permeate at essentially the membrane feed pressure. Simultaneous permeation of carbon dioxide and methane occur in the adsorbent membrane, which can be operated at feed pressures as low as 5 psig when hydrogen is used as a sweep gas.
Anand Madhu
Rao Madhukar Bhaskara
Sircar Shivaji
Air Products And Chemicals Inc.
Mcfadden Fincham
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