Preparation of thin and highly stable Pd/Ag composite membranes and simulative analysis of transfer resistance for hydrogen separation

被引：72

作者：

Hou, K ^{[1
]}

Hughes, R ^{[1
]}

机构：

[1] Univ Salford, Chem Engn Unit, Salford M5 4WT, Lancs, England

来源：

JOURNAL OF MEMBRANE SCIENCE | 2003年 / 214卷 / 01期

关键词：

Pd/Ag membranes; hydrogen permeation; mass transfer resistances;

D O I：

10.1016/S0376-7388(02)00525-2

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Composite Pd/Ag membranes supported on an alpha-alumina substrate have been prepared by sequential electroless plating and the morphology of the membranes has been examined by SEM and XRD analysis. SEM pictures revealed that the Pd/Ag film was of columnar form perpendicular to the substrate. Homogeneous alloy films of Pd/Ag were obtained by annealing the separate Pd and Ag deposited layers at temperatures higher than 600degreesC in a hydrogen atmosphere. Hydrogen fluxes of up to 0.35 mol/(m(2)s) and hydrogen/nitrogen selectivities of 4500 were obtained and a long-term temperature cycling test showed no deterioration in membrane performance. A simulative analysis was carried out to investigate the effect of boundary layer and the distribution of hydrogen transfer resistance between the boundary layer, the Pd/Ag film and the substrate. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：43 / 55

页数：13

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