Journal of Industrial and Engineering Chemistry, Vol.9, No.4, 461-463, October, 2003
Effect of Phenyl-substituted Ethoxysilane on Gas Permeation Characteristics of a Silica Membrane
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The present study attempts to control the micropore size of silica membrane by varying a substituent group in silane precursors. An amorphous silica membrane was produced by thermal decomposition of phenylethoxysilane (PTES) on a γ-alumina coated α-alumina tube with pore size of 6-8 nm. For the gas molecules of CO2, N2, CH4 and C3H8, the PTES-derived membrane exhibited higher molecular-sieving property than the membrane formed with tetraethoxysilane (TEOS). Controlling of micropores of silica membrane using phenylethoxysilane as the Si-source was conjectured to result in performance improvements.
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