Preparation and characterisation of Pd and Pt/SiO2-Al2O3 non-permselective membranes

被引：5
|
作者：
Murru, M [1 ]
Prabowo, A [1 ]
Gavriilidis, A [1 ]
机构：
[1] UCL, Dept Chem Engn, London WC1E 7JE, England
来源：
JOURNAL OF MEMBRANE SCIENCE | 2005年 / 248卷 / 1-2期
基金：
英国工程与自然科学研究理事会;
关键词：
membrane; freeze-drying; Pd; Pt;
D O I：
10.1016/j.memsci.2004.08.032
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Pd and Pt/SiO(2)-Al(2)O(3) 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 alpha-Al(2)O(3) 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 SiO(2) layer on the external support surface. Pt and Pd were introduced by impregnation of the SiO(2)-Al(2)O(3) membrane with hexachloroplatinic acid and palladium nitrate solution, respectively. Freeze-drying provided more uniform metal distribution than conventional drying. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：27 / 36
页数：10
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