کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
634052 1456053 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of MFI zeolite intermediate layers on gas separation performance of carbon molecular sieve (CMS) membranes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Effect of MFI zeolite intermediate layers on gas separation performance of carbon molecular sieve (CMS) membranes
چکیده انگلیسی
To strengthen interfacial adhesion between selective carbon molecular sieve (CMS) layers and α-Al2O3 substrates, mordenite framework inverted (MFI)-type intermediate layers were synthesized to reduce pore sizes and improve chemical characteristics of underlying substrates and consequently facilitate formation of CMS layers. MFI-type zeolite intermediate layers were prepared on α-Al2O3 substrates via secondary growth of seeds to form polycrystalline zeolite layers with a-oriented crystallites. These crystallites increased cross-link strength between separation layers as well as gas pair separation performance. When a porous substrate was treated with silica seeds and covered with an MFI intermediate layer, CMS selectivity for H2/CH4 increased to 260.9 with permeability towards H2 of 2224 Barrer. These modifications improved the mechanical stability of CMS layers and will assist in their commercialization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 446, 1 November 2013, Pages 220-229
نویسندگان
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