Tantalum stabilized SrCoO3-δ perovskite membrane for oxygen separation

被引：66

作者：

Chen, Xinzhi ^{[1
]}

Huang, Liu ^{[1
]}

Wei, Yanying ^{[1
]}

Wang, Haihui ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China

来源：

JOURNAL OF MEMBRANE SCIENCE | 2011年 / 368卷 / 1-2期

关键词：

Perovskite; Mixed-conductor; Membrane; Oxygen separation; MIXED CONDUCTING OXIDES; CERAMIC MEMBRANE; IONIC-CONDUCTIVITY; PERMEATION; PERMEABILITY; REACTOR; SRCO0.8FE0.2O3-DELTA; METHANE; FE;

D O I：

10.1016/j.memsci.2010.11.040

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The mixed ion and electron conducting oxides of SrCo1-yTayO3-delta (0 <= y <= 0.3) powders were prepared by solid state reaction. By doping 10 mol% of tantalum on the B-site of SrCoO3, the cubic perovskite structure of the SrCoO3 is stable and a high oxygen permeation flux is achieved. The phase structure of the perovskite-type oxide of SrCo0.9Ta0.1O3-delta was characterized by X-ray diffraction (XRD) and oxygen temperature-programmed desorption (O-2-TPD) revealing that SrCo0.9Ta0.1O3-delta exhibits a good phase structure stability and reversibility in air. The oxygen permeation is predominated by oxygen ion bulk diffusion at the temperature > 900 degrees C. During the long-term operation, the SrCo0.9Ta0.1O3-delta membrane is operated at 900 degrees C for more than 520h with a steady oxygen permeation flux of around 1.36 x 10(-6) mol/s cm(2) with a membrane thickness of 0.65 mm under He/air gradient. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：159 / 164

页数：6

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