石油化工2024，Vol.53Issue(3)：305-313,9.DOI:10.3969/j.issn.1000-8144.2024.03.001
不同支撑材料对Na-Mn2O3载氧体化学链甲烷氧化偶联性能的影响
Effects of different supports on performance of Na-Mn2O3 oxygen carrier for chemical-looping oxidative coupling of methane
摘要
Abstract
Three Na-Mn2O3 oxygen carriers(OCs)supported by different inert supports(SiO2,MgO,TiO2)with stable porous structure were prepared by impregnation method.The microstructures of OCs were characterized by XRD,N2 adsorption-desorption,SEM and H2-TPR.The effects of supports on the performance of Na-Mn2O3 OCs in chemical-looping oxidative coupling of methane were investigated at various temperatures.The experimental results show that the supports exhibited strong influences on the catalytic activity and oxygen transport capacity of OCs.SiO2 possesses a more porous structure and higher specific surface area as compared to MgO and TiO2.Na-Mn2O3/SiO2 exhibits the best catalytic performance with 74.25%of C2 selectivity and 14.12%of C2 yield at 800℃.Na-Mn2O3/SiO2 and Na-Mn2O3/MgO show good structural stability and lattice oxygen stability.During the preparation of OCs,the precursor of MgO supports strongly interact with the precursor of Mn2O3,forming Mg6MnO8 and resulting in higher oxygen storage capacity.关键词
化学链/甲烷氧化偶联/载氧体/支撑材料/催化反应Key words
chemical-looping/oxidative coupling of methane/oxygen carrier/support/catalytic reaction分类
化学化工引用本文复制引用
毛瑞,陈良勇..不同支撑材料对Na-Mn2O3载氧体化学链甲烷氧化偶联性能的影响[J].石油化工,2024,53(3):305-313,9.基金项目
国家自然科学基金面上项目(52076042). （52076042）
