B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
319/12, 252/18,
B01D 53/34 (2006.01) B01D 53/86 (2006.01) C01B 3/50 (2006.01)
Patent
CA 1093536
ABSTRACT A membrane suitable for absorbing a gas component present in a gaseous stream (e.g. carbon dioxide from a hydrogen feed for an alkaline fuel cell) comprises a porous layer of hydrophilic material, both faces of which are covered by a layer of mixture of 10 to 90 wt.% of a hydrophobic substance and 90 to 10 wt.% of a hydrophilic substance, the hydrophilic portions of the three layers being impregnated with a carbon dioxide hydration catalyst e.g. sodium meta arsenite, at a concentration of 0.1 to 3M and a 2 to 14N alkali metal buffer solution. The gaseous component is absorbed from a gaseous stream containing said component by causing said stream to flow adjacent to a humidified stripping gas having a relative humidity of 0.4 to 0.95, the flows of said stream and said stripping gas being separated by the membrane.
279954
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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