Removal of a gas component present in a gaseous stream

Details Removal of a gas component present in a gaseous stream Removal of a gas component present in a gaseous stream

1977-06-02

1978-09-26

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423210, 423220, 423229, 423232, 55 16, 55158, B01D 5334

Patent

active

041170792

ABSTRACT:
A membrane suitable for absorbing a gas component present in a gaseous stream (e.g. carbon dioxide with 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 a 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.

REFERENCES:
patent: 3396510 (1968-08-01), Ward et al.
patent: 3676220 (1972-07-01), Ward
patent: 3851041 (1974-11-01), Eickmeyer
patent: 3911080 (1975-10-01), Mehl et al.

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