Novel nanoporous carbon membranes for recovery of H{sub 2} from refinery offgas
A new gas separation membrane has been developed which consists of thin nanoporous support layer of adsorbent carbon supported on a macroporous support. Gas separation is accomplished by selective adsorption and selective surface flow of the more strongly adsorbed component of the feed gas mixture. Thus, the less strongly adsorbed components are retained at feed pressure. The presence of the adsorbed layer severely hinders the permeation of the less strongly adsorbed components resulting in very high permeation selectivities. The membranes are prepared by controlled pyrolysis of a thin layer of polymer supported on a porous support material. They are ideally suited for recovery of hydrogen from refinery waste gases. The paper describes the preparation, permeation characteristics, and application of these membranes to the recovery of hydrogen from waste gas streams.
- OSTI ID:
- 370386
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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