Preparation and characterisation of Pd and Pt/SiO2–Al2O3 non-permselective membranes
Preparation and characterisation of Pd and Pt/SiO2–Al2O3 non-permselective membranes
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DOI：
10.1016/j.memsci.2004.08.032
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发表时间：
2005-02
影响因子：
9.5
通讯作者：
M. Murru;Albertino Prabowo;A. Gavriilidis
中科院分区：
文献类型：
--
作者：
M. Murru;Albertino Prabowo;A. Gavriilidis
Pd and Pt/SiO2–Al2O3tubular 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-Al2O3supports. 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 SiO2layer on the external support surface. Pt and Pd were introduced by impregnation of the SiO2–Al2O3membrane with hexachloroplatinic acid and palladium nitrate solution, respectively. Freeze-drying provided more uniform metal distribution than conventional drying.
