کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
625155 1455418 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of high performance NaA zeolite-polyimide composite membranes on a ceramic hollow fiber by dip-coating deposition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Synthesis and characterization of high performance NaA zeolite-polyimide composite membranes on a ceramic hollow fiber by dip-coating deposition
چکیده انگلیسی

NaA zeolite membranes were synthesized on a porous seeded α-Al2O3 ceramic hollow fiber substrate via microwave heating method. Dense intergrown NaA zeolite-polyimide (PI) composite membranes were prepared by dip-coating with polyamic acid solution and imidization process on the NaA zeolite membranes. The composite membranes were characterized by XRD, FT-IR, SEM, gas permeation and pervaporation tests. The differences in morphology, structure and gas permeability between NaA zeolite and NaA zeolite-PI composite membranes were explored. XRD results show that only NaA zeolite emerges on the support, and FT-IR results show that PI has been successfully synthesized on NaA zeolite membranes surface. The SEM images show that the particles are twinborn by well intergrowth on the composite membrane surface. Gas permeation tests on H2, O2, N2 and C3H8 under different temperatures display that the permeance of H2 on the NaA zeolite-PI composite membranes is lower than that of NaA zeolite membranes, and the permselectivity of H2/C3H8 on the former membranes is higher than that of the latter. Pervaporation experiments of the as-synthesized membranes on various alcohol mixtures indicate that the maximum selectivity of NaA zeolite-PI composite membranes on EtOH/H2O solution with the water content of 10 wt.% was much higher.

Research Highlights
► NaA zeolite membranes were synthesized on seeding α-Al2O3 ceramic hollow fiber.
► Using APTES as covalent linker to connect the PI with NaA zeolite tightly.
► The particles are twin born on the NaA zeolite-PI composite membrane surface.
► NaA zeolite-PI composite membranes displayed a much better separation properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 273, Issues 2–3, 15 June 2011, Pages 343–351
نویسندگان
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