Method of improving the selectivity of carbon membranes by...

B - Operations – Transporting – 01 – D

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B01D 67/00 (2006.01) B01D 53/22 (2006.01) B01D 71/02 (2006.01) C04B 41/50 (2006.01) C04B 41/85 (2006.01) C23C 16/04 (2006.01) C23C 16/26 (2006.01) C23C 16/56 (2006.01)

Patent

CA 2119198

A process for manufacturing carbon membranes having controlled pore sizes comprises the steps of: a) causing a stream of a pyrolysable carbon-containing gas to come into contact with a carbon membrane having a pore size and/or distribution larger than the desired pore size and/or distribution; b) raising the ambient temperature of the said membrane to or above the temperatures at which the adsorbed carbon-containing gas pyrolyzes; and c) substantially purging the atmosphere surrounding the membrane from carbon-containing gas.

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