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基于萤石相粒子掺杂制备高稳定SrCo0.8Fe0.2O3-δ 基质透氧膜材料

作者：裴瑜洁，解品红，王雨生，夏媛玉，李芳，李其明

单位：辽宁石油化工大学，石油化工学院，辽宁抚顺，113001

关键词：透氧膜；钙钛矿；掺杂；稳定性；膜分离

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2022,42(6):87-93

摘要：

采用一锅法合成了系列Ce0.8Sm0.2O1.9（SDC）掺杂的SrCo0.8Fe0.2O3-?钙钛矿材料，系统研究了SDC掺杂对SrCo0.8Fe0.2O3-δ钙钛矿材料晶相结构和微观形貌的影响，以及SDC掺杂对SrCo0.8Fe0.2O3-δ钙钛矿材料氧渗透性能的影响。结果表明：SDC掺杂不会影响SrCo0.8Fe0.2O3-δ材料的晶相结构，二者保持了良好的化学相容性，粒径较小的SDC粒子高度分散于SrCo0.8Fe0.2O3-δ钙钛矿晶粒之间。经过SDC掺杂的SrCo0.8Fe0.2O3-δ材料膜层破碎现象得到了显著抑制，其氧渗透稳定性显著提高，其中当SDC掺杂量为10%时其透氧量可达1.71 mL/(cm2·min)，该材料在775 oC 80小时透氧操作中保持了0.56 mL/(cm2·min)的高透氧量，且没有出现透氧量衰减现象，展现了良好的中低温氧渗透稳定性。

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.

基金项目：

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）

作者简介：

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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