SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (11): 1763-1767.DOI: 10.1016/j.cjche.2015.08.023

• 分离科学与工程 • 上一篇    下一篇

Cobalt-free gadolinium-doped perovskite Gdx1-xFeO3-δ as high-performance materials for oxygen separation

Yanjie Wang, Qing Liao, Yan Chen, Libin Zhuang, Haihui Wang   

  1. School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • 收稿日期:2015-05-06 修回日期:2015-06-16 出版日期:2015-11-28 发布日期:2015-12-18
  • 通讯作者: Haihui Wang
  • 基金资助:

    Supported by the National Science Fund for Distinguished Young Scholars of China (21225625), the National Natural Science Foundation of China (21176087) and the Specialized Research Fund for the Doctoral Program of Higher Education (20110172110013).

Cobalt-free gadolinium-doped perovskite Gdx1-xFeO3-δ as high-performance materials for oxygen separation

Yanjie Wang, Qing Liao, Yan Chen, Libin Zhuang, Haihui Wang   

  1. School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2015-05-06 Revised:2015-06-16 Online:2015-11-28 Published:2015-12-18
  • Contact: Haihui Wang
  • Supported by:

    Supported by the National Science Fund for Distinguished Young Scholars of China (21225625), the National Natural Science Foundation of China (21176087) and the Specialized Research Fund for the Doctoral Program of Higher Education (20110172110013).

摘要: Cobalt-free oxides Gdx1-xFeO3-δ (0.01 ≤ x ≤ 0.1)were achieved by a solid state reactionmethod. It is found that Gdx1-xFeO3-δ (0.025 ≤ x ≤ 0.1) exhibits the cubic perovskite structure. Among Gdx1-xFeO3-δ (0.025 ≤ x ≤ 0.1), the Gd0.025Ba0.975FeO3-δ (GBF2.5) membrane shows the outstanding phase structure stability and the highest oxygen permeation,which can reach 1.44ml·cm-2·min-1 at 950 ℃ under air/He oxygen partial pressure gradient. The GBF2.5 membranewas successfully operated formore than 100 h at 800 ℃ and the oxygen permeation flux through the membrane is 0.62 ml·cm-2·min-1. After 100 h oxygen permeation experiment at 800 ℃, X-ray diffraction (XRD) and energy dispersive X-ray spectrometer (EDXS) demonstrate that the GBF2.5 exhibits phase structure stability even at intermediate temperature.

关键词: Perovskite, Membranes, Permeation, BaFeO3-&delta, , Oxygen separation

Abstract: Cobalt-free oxides Gdx1-xFeO3-δ (0.01 ≤ x ≤ 0.1)were achieved by a solid state reactionmethod. It is found that Gdx1-xFeO3-δ (0.025 ≤ x ≤ 0.1) exhibits the cubic perovskite structure. Among Gdx1-xFeO3-δ (0.025 ≤ x ≤ 0.1), the Gd0.025Ba0.975FeO3-δ (GBF2.5) membrane shows the outstanding phase structure stability and the highest oxygen permeation,which can reach 1.44ml·cm-2·min-1 at 950 ℃ under air/He oxygen partial pressure gradient. The GBF2.5 membranewas successfully operated formore than 100 h at 800 ℃ and the oxygen permeation flux through the membrane is 0.62 ml·cm-2·min-1. After 100 h oxygen permeation experiment at 800 ℃, X-ray diffraction (XRD) and energy dispersive X-ray spectrometer (EDXS) demonstrate that the GBF2.5 exhibits phase structure stability even at intermediate temperature.

Key words: Perovskite, Membranes, Permeation, BaFeO3-&delta, , Oxygen separation