Novel cobalt-free tantalum-doped perovskite BaFe1-yTayO3-δ with high oxygen permeation

doi:10.1016/j.cjche.2015.11.003

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (3): 339-344.DOI: 10.1016/j.cjche.2015.11.003

• 第25届中国过程控制会议专栏 • 上一篇下一篇

Qing Liao, Yanjie Wang, Yan Chen, Haihui Wang

收稿日期:2015-01-31 修回日期:2015-04-26 出版日期:2016-03-28 发布日期:2016-04-08
通讯作者: Haihui Wang

Novel cobalt-free tantalum-doped perovskite BaFe_1-yTa_yO_3-δ with high oxygen permeation

Qing Liao, Yanjie Wang, Yan Chen, Haihui Wang

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China

Received:2015-01-31 Revised:2015-04-26 Online:2016-03-28 Published:2016-04-08
Supported by:
Supported by the National Science Fund for Distinguished Young Scholars of China(No.21225625), the National Natural Science Foundation of China(No. 21176087) and the Specialized Research Fund for the Doctoral Program of Higher Education(No.20110172110013).

摘要/Abstract

Abstract: Cobalt-free perovskite-type oxides BaFe_1-yTa_yO_3-δ(0≤y≤0.2) were synthesized via a simple solid state reaction. The cubic perovskite structure can be obtained when y is over 0.1.BaFe_0.9Ta_0.1O_3-δ(BFT0.1) membrane shows the highest oxygen permeation flux, which can reach 1.6 ml·min^-1·cm^-2 at 950℃ under the gradient of air/He.The O₂-TPD results reveal that BaFe_0.9Ta_0.1O_3-δ material shows an excellent reversibility and phase structure stability in air.The oxygen permeation flux is limited by the bulk diffusion when the membrane thickness is over 0.8 mm, and it is limited by both the bulk diffusion and the surface exchange when the membrane thickness is below 0.5 mm.Stable oxygen permeation fluxes are obtained during 180 h operation.

Key words: Cobalt-free, Perovskite-type, BaFe_1?yTa_yO_3-&delta, , Oxygen permeation, Stable

Qing Liao, Yanjie Wang, Yan Chen, Haihui Wang. [J]. Chinese Journal of Chemical Engineering, 2016, 24(3): 339-344.

Qing Liao, Yanjie Wang, Yan Chen, Haihui Wang. Novel cobalt-free tantalum-doped perovskite BaFe_1-yTa_yO_3-δ with high oxygen permeation[J]. Chin.J.Chem.Eng., 2016, 24(3): 339-344.

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Novel cobalt-free tantalum-doped perovskite BaFe_1-yTa_yO_3-δ with high oxygen permeation

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