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- W2079224645 abstract "Abstract A highly hydrogen permeable silica membrane, referred to as Nanosil, was obtained by chemical vapor deposition of a thin SiO 2 layer on a porous Vycor glass support. This composite membrane showed good permeance (∼10 −8 mol m −2 s −1 Pa −1 ) for the small gas molecules (He, Ne, and H 2 ) at 873 K with high selectivity (∼10 4 ) over other larger gas molecules (CO 2 , CO, and CH 4 ). The characteristics of gas transport on the Vycor and Nanosil membrane were investigated with several gas diffusion models. The experimental gas permeation data on Vycor glass could be explained by the occurrence of Knudsen diffusion in parallel with surface diffusion. The permeance of the small gas molecules (He, Ne, and H 2 ) on the Nanosil membrane was activated, and increased as temperature increased. However, this permeance was limited at high temperature because of the limited permeance on the Vycor support. The gas permeance on the deposited silica layer was obtained by applying a series analysis of gas permeation on the combined silica layer and Vycor support composite system. The order of permeance through the silica layer was He>H 2 >Ne which was the same as that through vitreous silica glass, but occurred with lower activation energies. The order of permeation of these small gas molecules did not follow either mass or molecular size but could be explained using a statistical gas permeance model." @default.
- W2079224645 created "2016-06-24" @default.
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- W2079224645 date "2002-12-01" @default.
- W2079224645 modified "2023-09-23" @default.
- W2079224645 title "Gas permeation characteristics of a hydrogen selective supported silica membrane" @default.
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- W2079224645 doi "https://doi.org/10.1016/s0376-7388(02)00389-7" @default.
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