| 摘要 |
Molecular sieve carbons of tailored pore aperture size are prepared by sorbing a hydrocarbon, preferably propylene, in a degassed micropore-containing carbon substrate at an intermediate temperature, removing the physically held hydrocarbon while retaining at the pore apertures irreversibly fixed (chemisorbed or polymerized) hydrocarbon, and cracking the retained hydrocarbon at significantly higher temperature to deposit pyrocarbon at the pore apertures. To protect these molecular sieve carbons and other gas-sorbing carbons from loss of capacity and/or selectivity by exposure to moisture and/or oxygen, these carbons are treated with hydrogen at superatmospheric pressure. |
