Synthesis and oxygen permeation study of novel perovskite-type BaBixCo0.2Fe0.8-xO3-δ ceramic membranes

被引：88

作者：

Shao, ZP ^{[1
]}

Xiong, GX ^{[1
]}

Cong, Y ^{[1
]}

Yang, WS ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key lab Catalysis, Dalian 116023, Peoples R China

来源：

JOURNAL OF MEMBRANE SCIENCE | 2000年 / 164卷 / 1-2期

关键词：

inorganic membrane; bismuth; perovskite; oxygen and nitrogen separation; mixed conducting;

D O I：

10.1016/S0376-7388(99)00211-2

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Novel perovskite-type B-site Bi-doped BaBixCo0.2Fe0.8-xO3-delta (0.1 less than or equal to x less than or equal to 0.5) oxide membranes were exploited and synthesized. Oxygen permeation through these membranes was studied by the GC method using a high-temperature permeation cell. High permeation fluxes were observed. The permeation Aux of BaBi0.2Co0.2Fe0.6O3-delta membrane reached about 1 mi min(-1) cm(-2) under air/He gradients at 950 degrees C. The dependence of the permeation flux on thickness for BaBi0.3Co0.2Fe0.5O3-delta membrane was investigated in a wide temperature range from 600 degrees C to 950 degrees C. The permeation rate was controlled by surface exchange kinetics at lower temperatures. Bulk diffusion became partially rate-determining with rise in temperature. Oxygen temperature-programmed desorption (O-2-TPD) results showed very good oxygen adsorption and desorption reversibility of the materials. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：167 / 176

页数：10

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