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- W2076227645 abstract "High-performance organic–inorganic hybrid silica membranes were developed for use in membrane reactors for methylcyclohexane (MCH) dehydrogenation to toluene (TOL). The membranes were prepared via sol–gel processing using bis(triethoxysilyl)ethane (BTESE). In particular, the effect of hydrolysis conditions (H2O/BTESE molar ratio) on membrane performance was extensively investigated. Characterization based on TG-MASS, FTIR, N2 adsorption and positron annihilation lifetime (PAL) measurements of BTESE-derived silica gels revealed that the ethoxides of BTESE were almost completely hydrolyzed and the silica networks became dense by increasing the H2O/BTESE molar ratio from 6 to 240. BTESE-derived silica membranes showed a hydrogen permeance that was higher than 1×10−6 mol/(m2 s Pa). H2/TOL selectivity increased from 100 to 10,000 by increasing the H2O/BTESE molar ratio from 6 to 240, while keeping a hydrogen permeance of more than 1×10−6 mol/(m2 s Pa). In MCH dehydrogenation, a BTESE-derived silica membrane reactor with a Pt/γ-Al2O3/α-Al2O3 bimodal catalytic layer achieved MCH conversion of 75% that was higher than the equilibrium conversion of 60%, and a hydrogen purity in the permeate stream of more than 99.9% at 230 °C." @default.
- W2076227645 created "2016-06-24" @default.
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- W2076227645 date "2014-04-01" @default.
- W2076227645 modified "2023-10-15" @default.
- W2076227645 title "Preparation of BTESE-derived organosilica membranes for catalytic membrane reactors of methylcyclohexane dehydrogenation" @default.
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- W2076227645 doi "https://doi.org/10.1016/j.memsci.2014.01.003" @default.
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