SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (3): 339-344.DOI: 10.1016/j.cjche.2015.11.003

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

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

Qing Liao, Yanjie Wang, Yan Chen, Haihui Wang   

  1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2015-01-31 Revised:2015-04-26 Online:2016-04-08 Published:2016-03-28
  • 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).

Abstract: Cobalt-free perovskite-type oxides BaFe1-yTayO3-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.BaFe0.9Ta0.1O3-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 BaFe0.9Ta0.1O3-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, BaFe1?yTayO3-&delta, , Oxygen permeation, Stable