| 摘要 |
PURPOSE:To prepare a porous diaphragm of pure alumina having suitable pore size for gas separation and sufficiently high strength by molding and drying a mixture of calcined and uncalcined alumina sol, and calcining the product. CONSTITUTION:A mixture of 25-75wt% calcined alumina sol with residual wt% uncalcined alumina sol is molded and dried; the product is calcined at 500-900 deg.C for 2-24hr to obtain a target porous diaphragm for gas separation. The average pore size of the diaphragm is about 50-300Angstrom . Satisfactory results may be attained when the diaphragm is used for gas separation, for example, selective separation of H2 from a gaseous mixture of H2 and N2.
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