| 摘要 |
<p>An inorganic gas separation membrane having good resistances to chemicals and heat, and an equivalent separation efficiency to that of organic membranes, when used for CO2 separation , is produced by hermetically placing an aqueous mixture of tetra(lower alkoxy) silane as a silica source, an alumina source, an alkali metal source and a crystallizing agent into a pressure vessel together with a porous inorganic substrate, and keeping the pressure vessel at a hydrothermal synthesis temperature of 160 to 200 DEG C, thereby forming a layer of synthetic zeolite ZSM-5 on the porous inorganic substrate.</p> |
