Preparation, Hydrogen Separation and Hydrothermal Stability of Microporous Silica Membrane

Abstract

Abstract: Microporous silica membranes on Υ-Al₂O₃/α-Al₂O₃ porous supports were prepared by a sol-gel process, and characterized by IR, TG, FE-SEM,N₂ adsorption as well as gas permeation. The H₂ permeance of 2.3×10^-7mol·m^-2·Pa^-1·s^-1 and H₂/CO₂ separation factor of 8.0 were measured with the as-prepared membrane at 200℃. Deterioration of the membrane performance in the humid atmoshphere was observed, which can be attributed to the collapse of the pore structure caused by the reaction between surface hydroxy group and water vapor.

Key words: silica membrane, hydrogen separation, hydrothermal stability

CLC Number:

O484

WEI Qi,LI Jian-Lin,SONG Chun-Lin,LIU Wei,CHEN Chu-Sheng. Preparation, Hydrogen Separation and Hydrothermal Stability of Microporous Silica Membrane[J]. Journal of Inorganic Materials.

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Preparation, Hydrogen Separation and Hydrothermal Stability of Microporous Silica Membrane

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