Hydrogen permeation in asymmetric La28-xW4+xO54+3x/2 membranes

被引：31
作者：
Gil, Vanesa [1 ]
Gurauskis, Jonas [1 ]
Kjolseth, Christian [2 ]
Wiik, Kjell [1 ]
Einarsrud, Mari-Ann [1 ]
机构：
[1] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, NO-7491 Trondheim, Norway
[2] Protia AS, NO-0349 Oslo, Norway
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 07期
关键词：
Proton conductor; Hydrogen; Permeation; Dense ceramic membrane; Lanthanum tungstate; GD;
D O I：
10.1016/j.ijhydene.2012.12.105
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Asymmetric supported La28 - xW4 + xO54 + 3x/2 (La/W approximate to 5.6) membranes were investigated for their hydrogen permeation properties as a function of temperature and feed gas conditions. Dense membranes of thickness 25-30 mu m supported on substrates with 25 and 40 vol.% porosity were compared. Above 850 degrees C under dry conditions, the hydrogen permeation rate was approximately constant as a function of temperature due to low concentration of protons in the material at high temperatures. Under humid conditions and above 960 degrees C enhanced permeation rates were observed. A hydrogen permeation as high as 0.14 NmL min(-1) cm(-2) was recorded at 1000 degrees C with 10 vol.% H-2 (2.5 vol.% H2O) as feed gas. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3087 / 3091
页数：5
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