05435836 is referenced by 69 patents and cites 17 patents.

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 nonpermeate 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.

Title
Hydrogen recovery by adsorbent membranes
Application Number
8/173457
Publication Number
5435836
Application Date
December 23, 1993
Publication Date
July 25, 1995
Inventor
Shivaji Sircar
Wescosville
PA, US
Madhukar B Rao
Allentown
PA, US
Madhu Anand
Allentown
PA, US
Agent
John M Fernbacher
Assignee
Air Products and Chemicals
PA, US
IPC
B01D 53/22
B01D 53/047
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