Improved oxygen permeability of Ce0.8Sm0.2O2-δ-PrBaCo2O5+δ dual-phase membrane by surface-modifying porous layer

被引：12
作者：
Chen, Ting [1 ]
Zhao, Hailei [1 ,2 ]
Xie, Zhixiang [1 ]
Lu, Yao [1 ]
Xu, Nansheng [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Beijing Key Lab New Energy Mat & Technol, Beijing 100083, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 24期
基金：
北京市自然科学基金;
关键词：
Composite; Ceria; Double perovskite; Membrane; Oxygen permeation; PERMEATION; COMPOSITE; OXIDE; CONDUCTIVITY; SEPARATION;
D O I：
10.1016/j.ijhydene.2012.09.144
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：
A porous PrBaCO2O5+delta or Ce0.8Sm0.2O2-delta-50 vol.% PrBaCO2O5+delta (SDC-PBCO (5/5)) layer was deposited on dense Ce0.8Sm0.2O2-delta-40 vol.% PrBaCo2O5+delta (SDC-PBCO (6/4)) membrane (450 mu m) to enhance the oxygen permeability by increasing the surface area contacting with air. The oxygen permeation flux was measured in the temperature range of 825-945 degrees C. The results revealed that the oxygen permeation performance of Ce0.8Sm0.2O2-delta-PrBaCO2O5+delta membranes can be significantly enhanced by coating SDC-PBCO (5/5) porous layer alone on the surface of feed side. The thickness of modification layer has obvious effect on the permeability of surface modified membrane. The modification on the feed side has much better effect than that on the permeate side. At 945 degrees C, the oxygen permeation flux of dense SDC-PBCO (6/4) membrane modified by porous SDC-PBCO (5/5) layer is 3.56 x 10(-7-) mol cm(-2) s(-1), 26% higher than that of the unmodified one. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：19133 / 19137
页数：5
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