Hydrogen permeation through porous stainless steel for palladium-based composite porous membranes

被引：29

作者：

Nayebossadri, Shahrouz ^{[1
]}

Fletcher, Sean ^{[1
]}

Speight, John D. ^{[1
]}

Book, David ^{[1
]}

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

来源：

JOURNAL OF MEMBRANE SCIENCE | 2016年 / 515卷

基金：

英国工程与自然科学研究理事会;

关键词：

Hydrogen separation; Palladium-based membrane; Porous stainless steel; Composite membrane; Surface modification; PD-CU MEMBRANES; PLANAR METALLIC SUBSTRATE; ALLOY MEMBRANES; DIFFUSION BARRIER; SEPARATION; ELECTROLESS; FABRICATION; SUPPORT; TRANSPORT; SURFACE;

D O I：

10.1016/j.memsci.2016.05.036

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Surface topography and hydrogen permeation properties of Porous Stainless Steel (PSS) substrates for thin films deposition of Pd-based hydrogen separation membrane were investigated. Hydrogen permeance through the as received PSS substrates demonstrated a wide range, despite a similar average surface pore size of similar to 15 mu m determined by SEM and confocal laser microscopy analyses. The surface pores of the PSS substrates were modified by impregnation of varying amounts of tungsten (W) powder. Maximum hydrogen flux reduction of 28% suggested that W has a limited effect on the hydrogen permeation through the PSS substrate. Therefore, it appears that hydrogen transport through PSS substrates is mainly controlled by the substrate geometrical factor (epsilon/tau), that is the ratio of the porosity to tortuosity. In addition, tungsten was shown to inhibit the iron inter-diffusion between the PSS substrate and the deposited Pd60Cu40 film at temperature as high as 800 degrees C. Thus, tungsten layer also serves as an effective inter-diffusion barrier. The variation in the permeance between the nominally similar PSS substrates indicates the importance to independently assess the hydrogen transport characteristics of each of the components in a composite membrane. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：22 / 28

页数：7

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[1] Hydrogen membrane separation techniques [J].