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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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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 1â2, 15 February 2005, Pages 27-36
Journal: Journal of Membrane Science - Volume 248, Issues 1â2, 15 February 2005, Pages 27-36
نویسندگان
Marcello Murru, Albertino Prabowo, Asterios Gavriilidis,