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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2014.24.6.491

Gas Permeation Characteristics of PTMSP-Silica Composite Membranes Using Sol-Gel Process  

Yoon, Sung-Hyon (Department of Industrial Chemistry, Sang Myung University)
Lee, Hyun-Kyung (Department of Industrial Chemistry, Sang Myung University)
Publication Information
Membrane Journal / v.24, no.6, 2014 , pp. 491-497 More about this Journal
Abstract
PTMSP-silica composite membranes were prepared by addition of 0, 15, 20, and 30 wt% TEOS (tetraethoxysilane), TMOS (tetramethoxysilane), MTMOS (methyltrimethoxysilane), and PTMOS (phenyltrimethoxysilane) contents to PTMSP using sol-gel process. The gas permeability of the composite membranes for $H_2$, $N_2$ and ideal selectivity for $H_2$ over $N_2$ were investigated as a function of alkoxysilane content. The permeabilities for $H_2$ and $N_2$ increased in the range of alkoxysilane contents 0~20 wt%, however decrease the range of 20~30 wt%. The ideal selectivities for $H_2$ over $N_2$ decreased in the range of TEOS and PTMOS contents 0~15 wt%, but increased in the range of 15~30 wt%. When compared to the upper bound of Robeson, PTMSP-silica composite membranes with TEOS content of 30 wt%, MTMOS content of 20 wt% and PTMOS content of 30 wt% turned out to be a simultaneous improvement in ideal selectivity and permeability.
Keywords
PTMSP; silica; permeability; composite membrane; ideal selectivity;
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