不同离子掺杂LaMnO_(3)系列催化剂制备及其催化性能研究  

Study on Preparation and Catalytic Performance of LaMnO_(3) Catalysts Doped with Different Ions

作　　者：牛佳兴 汝志军 吴振豪 郑建东[1] NIU Jiaxing;RU Zhijun;WU Zhenhao;ZHENG Jiandong(College of Material and Chemical Engineering,Chuzhou University,Chuzhou 239000,China)

机构地区：[1]滁州学院材料与化工学院,安徽滁州239000

出　　处：《山东化工》2025年第5期59-62,共4页Shandong Chemical Industry

基　　金：安徽省教育厅自然科学研究重大项目(kJ2021ZD0135);滁州学院大学生创新项目(2024CXXL018)。

摘　　要：以柠檬酸作为络合剂,借助于溶胶-凝胶方法生产钙钛矿LaMnO_(3)催化剂,通过XRD、BET、H_(2)-TPR、热重分析仪TG-DSC和电子扫描显微镜SEM等技术进行催化剂物理测试。将催化剂用来催化甲烷低温燃烧,在不同温度下测定甲烷转化率,考察复合氧化物催化剂中掺杂不同离子(A=Ce、Sr;B=Co、Ni)对催化剂性能的影响。结果表明催化剂La_(0.6) Sr_(0.4) Mn_(0.6) Co_(0.2)Ni_(0.2)O_(3)具有较好的催化氧化性能,能降低反应温度,甲烷转化率达10%时反应温度为329℃,转化率达90%时反应温度为454℃。当掺杂Sr和Ni离子时,催化剂的比表面积较Ce和Co离子掺杂会有更明显的提升。The perovskite LaMnO_(3) catalyst was prepared by sol-gel method with citric acid as complexing agent.Physical properties of the catalyst were tested using XRD,BET,H_(2)-TPR,TG-DSC,and SEM.The catalyst was used to catalyze the low-temperature combustion of methane,and the methane conversion rate was determined at different temperatures.The effect of different ion(A=Ce,Sr,B=Co,Ni)doping on catalyst performance was investigated.The results show that La_(0.6) Sr_(0.4) Mn_(0.6) Co_(0.2)Ni_(0.2)O_(3) catalytic combustion of methane activity is best,T 10%light-off temperature is 329℃,completely transformation temperature T 90%to 454℃.When Sr and Ni ions are doped,the specific surface area of catalyst is increased more obviously than that of Ce and Co ions.

关 键 词：钙钛矿 掺杂 甲烷催化燃烧 

分 类 号：TQ426.6[化学工程]