A comparison of oxygen permeation and CO2 tolerance of La0.6Sr0.4CO0.2Fe0.6Nb0.2O3-delta and La0.6Sr0.4Fe0.8Nb0.2O3-delta ceramic membranes

作者：Gui Liangqi; Wan Yanhong; Wang Ranran; Wang Zhihao; He Beibei; Zhao Ling

来源：Journal of Alloys and Compounds, 2015, 644: 788-792.

DOI：10.1016/j.jallcom.2015.04.204

• Surface exchange
• Bulk diffusion
• Oxygen permeation
• CO2 tolerance

La0.6Sr0.4CO0.2Fe0.6Nb0.2O3-delta (LSCFN) and LauSr(0.4)Fe(0).8Nb0.2O3-delta (LSFN) perovskites are prepared for oxygen permeation membranes. The oxygen fluxes of LSCFN and LSFN at 900 degrees C are 0.20 mL cm(-2) min(-1) and 0.12 mL cm(-2) min(-1), respectively, which are closely related with their oxygen surface exchange and bulk diffusion properties. Importantly, the flux of LSFN under CO2 atmosphere remains steadier than ISCFN, which could be explained by average metal-oxygen bond energy (ABE) of perovskites. The balance between the oxygen permeation and CO2 tolerance of LSFN indicates it a promising candidate as oxygen permeation membrane for oxyfuel application.

• 出版日期2015-9-25
• 单位中国地质大学（北京）