کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
166200 1423469 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal Stability of Silica-Zirconia Membranes1
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Thermal Stability of Silica-Zirconia Membranes1
چکیده انگلیسی

The thermal stability, phase transformation, surface morphology, pore size distribution and permeation of the defect-free silica-zirconia membrane were investigated by using X-ray diffraction (XRD), atomic force microscopy (AFM), gas adsorption analyzer (BET), and gas permeation apparatus, respectively. Using silica as the stabilizing agent, the defect-free membrane was much more stable than pure zirconia. The crystal transformation of zirconia in the silica-stabilized membrane could be prohibited by the interaction between silica and zirconia. ZrO2 crystals were kept tetragonal below 900°C, the size of which did not change with temperature between 700°C and 900°C. It was further verified by the AFM observation, pore size analysis and permeation study. This thermal stability makes the silica-zirconia membrane a good choice as the intermediate layer for zeolite and Pd-based membranes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Chemical Engineering - Volume 14, Issue 1, February 2006, Pages 31-36