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Preparation of highly stable SrCo0.8Fe0.2O3-δ oxygen permeable membrane material by doping fluorite phase particles

Authors： PEIYujie, XIE Pinhong, WANG Yusheng, XIA Yuanyu, LI Fang，LI Qiming

Units： School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China

KeyWords： oxygen permeable membrane;perovskite;doping;stability;membrane separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2022,42(6):87-93

Abstract：

A series of Ce0.8Sm0.2O1.9 (SDC) doped SrCo0.8Fe0.2O3-δ perovskite materials were synthesized by one-pot method.The influence of SDC doping on the stability and oxygen permeability of SrCo0.8Fe0.2O3-δ perovskite material was systematically studied. And the influence of SDC doping on oxygen permeability stability of SrCo0.8Fe0.2O3-δ perovskite materials.The results show that SDC doping cannot affect the crystal phase structure of SrCo0.8Fe0.2O3-δ perovskite material, and both SDC and SrCo0.8Fe0.2O3-δ keep excellent chemical compatibility. The smaller SDC particles are highly distributed between SrCo0.8Fe0.2O3-δ grains. Meanwhile, the fragmentation phenomenon of SrCo0.8Fe0.2O3-δ disks is inhibited and oxygen permeation stability of SrCo0.8Fe0.2O3-δ can be significantly improved by SDC doping. When SDC doping content is about 10%, the oxygen permeation flux of the as-prepared material can reach up to about 1.71 mL/(cm2·min). Meanwhile, this material also exhibits a high oxygen permeability of about 0.56 mL/(cm2·min) during 80 hours of oxygen permeation operation at 775℃, and no any attenuation in oxygen permeation flux can be observed, showing a good oxygen permeation stability at intermediate-low temperature.

Funds：

国家自然科学基金项目（21703091, 21201096）；辽宁省教育厅资助项目 (L2019009)；辽宁科技厅计划指导项目（2019-ZD-0058）

AuthorIntro：

裴瑜洁（1997-），女，山西长治人，硕士，主要从事新型透氧膜材料及膜催化的研究工作

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