Method of improving the selectivity of carbon membranes by chemical carbon vapor deposition
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United States of America Patent
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Dec 9, 1997
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N/A
app pub date -
Aug 21, 1996
filing date -
Mar 23, 1993
priority date (Note) -
Expired
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Abstract
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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