基于萤石相粒子掺杂制备高稳定SrCo_(0.8)Fe_(0.2)O_(3-δ)基质透氧膜材料  

Preparation of highly stable SrCo_(0.8)Fe_(0.2)O_(3-δ)oxygen permeable membrane material by doping fluorite phase particles

作　　者：裴瑜洁 解品红 王雨生 夏媛玉 李芳[1] 李其明[1] PEI Yujie;XIE Pinhong;WANG Yusheng;XIA Yuanyu;LI Fang;LI Qiming(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,抚顺113001

出　　处：《膜科学与技术》2022年第6期87-93,共7页Membrane Science and Technology

基　　金：国家自然科学基金项目(21703091,21201096);辽宁省教育厅资助项目(L2019009,LJKMZ20220724);辽宁科技厅计划指导项目(2019-ZD-0058)。

摘　　要：采用一锅法合成了系列Ce_(0.8)Sm_(0.2)O_(1.9)(SDC)掺杂的SrCo_(0.8)Fe_(0.2)O_(3-δ)钙钛矿材料,系统研究了SDC掺杂对SrCo_(0.8)Fe_(0.2)O_(3-δ)钙钛矿材料晶相结构和微观形貌的影响,以及SDC掺杂对SrCo_(0.8)Fe_(0.2)O_(3-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SrCo_(0.8)Fe_(0.2)O_(3-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SrCo_(0.8)Fe_(0.2)O_(3-δ)钙钛矿晶粒之间.经过SDC掺杂的SrCo_(0.8)Fe_(0.2)O_(3-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/(cm^(2)·min),该材料在775℃、80 h透氧操作中保持了0.56 mL/(cm^(2)·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 Ce_(0.8)Sm_(0.2)O_(1.9)(SDC) doped SrCo_(0.8)Fe_(0.2)O_(3-δ)perovskite materials were synthesized by one-pot method.The influence of SDC doping on the stability and oxygen permeability of SrCo_(0.8)Fe_(0.2)O_(3-δ)perovskite material was systematically studied. And the influence of SDC doping on oxygen permeability stability of SrCo_(0.8)Fe_(0.2)O_(3-δ)perovskite materials.The results show that SDC doping cannot affect the crystal phase structure of SrCo_(0.8)Fe_(0.2)O_(3-δ)perovskite material, and both SDC and SrCo_(0.8)Fe_(0.2)O_(3-δ)keep excellent chemical compatibility. The smaller SDC particles are highly distributed between SrCo_(0.8)Fe_(0.2)O_(3-δ)grains. Meanwhile, the fragmentation phenomenon of SrCo_(0.8)Fe_(0.2)O_(3-δ)disks is inhibited and oxygen permeation stability of SrCo_(0.8)Fe_(0.2)O_(3-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/(cm^(2)·min). Meanwhile, this material also exhibits a high oxygen permeability of about 0.56 mL/(cm^(2)·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.

关 键 词：透氧膜 钙钛矿 掺杂 稳定性 膜分离 

分 类 号：TQ028.8[化学工程]