Abstract
Abstract Mesoporous silica containing zirconium (Zr-MCM-48) membranes were synthesized on a porous alumina support. The Zr-MCM-48 membranes showed high stability in the alkaline solution of pH 12, indicating that only 3 % of Zr effectively enhanced the alkaline resistance. The permeation of gases through the calcined Zr-MCM-48 membrane was governed by the Knudsen diffusion mechanism. There was no contribution of viscous flow, which occurs in large pinholes. The result of permporometry measurements suggested the narrow pore size distribution of the membrane.
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