Synthesis of a Multilayer Ceramic Membrane Used for Hydrogen Separation at High Temperature
Publish Year: 1390
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JPSTR-1-2_007
تاریخ نمایه سازی: 29 آذر 1402
Abstract:
A multilayer composite ceramic membrane was prepared by depositing a nano-scale layer of SiO۲ on top of a modified porous alumina support by chemical vapor deposition (CVD) method. The modification of the support was carried out by adding a graded layer of Al۲O۳ (γ-alumina phase), using sol-gel method. An optimized temperature of ۷۰۰ K for intermediate layer calcination was gained by XRD analysis. Cross-sectional images obtained from SEM showed that the intermediate γ-alumina layer had a thickness of about ۲ μm and the top selective silica layer was quite dense and uniform with a thickness of about ۹۰-۱۰۰ nm. Permeation tests showed a very good flux of ۱۰-۶-۱۰-۷ mol m-۲ s-۲ Pa-۱ for H۲ with selectivities over CO۲, N۲ and CH۴ up to ۵۰۰. By performing different tests with various deposition times, it was concluded that by changing CVD time from ۳ h to ۶ h H۲/CO۲ selectivity increased from ۳۲ to ۵۷۳, although H۲ permeation flux reduced about ۵۰ percent.
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Authors
M. Amanipour
Chemical Engineering Department, Sharif university of Technology, Tehran, Iran
E. Ganji Babakhani
Gas Department, Research Institute of petroleum Industry, Tehran, Iran
A. Zamanian
Gas Department, Research Institute of petroleum Industry, Tehran, Iran
M. Heidari
Chemical Engineering Department, Sharif university of Technology, Tehran, Iran
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