کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9685073 1456222 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterisation of Pd and Pt/SiO2-Al2O3 non-permselective membranes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Preparation and characterisation of Pd and Pt/SiO2-Al2O3 non-permselective membranes
چکیده انگلیسی
Pd and Pt/SiO2-Al2O3 tubular membranes were prepared with the aim of obtaining uniform pore size and precious metal distribution throughout the cross-section. Membrane permeability was controlled by depositing silica inside the pores of α-Al2O3 supports. This was achieved by immersing the support inside colloidal silica solution followed by freeze-drying and calcination. Various techniques were evaluated in order to avoid the formation of a thin SiO2 layer on the external support surface. Pt and Pd were introduced by impregnation of the SiO2-Al2O3 membrane with hexachloroplatinic acid and palladium nitrate solution, respectively. Freeze-drying provided more uniform metal distribution than conventional drying.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 248, Issues 1–2, 15 February 2005, Pages 27-36
نویسندگان
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