Ce0.50Zr0.50O2中掺杂M(M = Mn,Y)对乙酸乙酯燃烧催化剂MnOx/Ce0.50-zZr0.50-zM2zOy/Al2O3性能的影响  

Effect of Doping M(M=Mn,Y) into Ce_(0.50) Zr_(0.50)O_2 on the Properties of MnO_x/Ce_(0.50-z) Zr_(0.50-z)M_(2z)O_y/Al_2O_3 for Catalytic Combustion of Ethyl Acetate

作　　者：曹红岩[1] 王健礼[1] 闫生辉[1] 刘志敏[1] 龚茂初[1] 陈耀强[1] 

机构地区：[1]四川大学化学学院,教育部绿色化学与技术重点实验室,成都610064

出　　处：《物理化学学报》2012年第8期1936-1942,共7页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20773090,20803049)资助项目~~

摘　　要：考察了乙酸乙酯催化燃烧时,铈锆固溶体中掺杂M(M=Mn,Y)对催化剂MnOx/Ce0.50-zZr0.50-zM2zOy/Al2O3活性的影响.结果表明:Mn的掺杂明显增加了储氧材料的储氧量(OSC),Y的掺杂明显降低了催化剂的还原温度;Mn和Y的同时掺杂兼具Mn掺杂和Y掺杂的优点.催化剂MnOx/Ce0.40Zr0.40Mn0.10Y0.10Oy/Al2O3性能最佳,乙酸乙酯完全转化温度为513K,且T10%和T100%间隔的温度范围最窄,可适用于较大初始浓度变化范围和较高空速(GHSV)条件下的乙酸乙酯净化.H2程序升温还原(H2-TPR)和X射线衍射(XRD)测试显示,MnOx/Ce0.40Zr0.40Mn0.10Y0.10Oy/Al2O3具有较低的还原温度和较大的还原峰面积;Mn和Y进入铈锆固溶体的晶格,改善了其织构性能,促进了锰氧化物在载体表面的分散.The effect of doping M （M = Mn,Y） into ceria-zirconia solid solutions on the activity of MnOx/Ce0.50-zZr0.50-zM2zOy/Al2O3 for catalytic combustion of ethyl acetate has been investigated. It is found that doping of Mn increases greatly the oxygen storage capacity （OSC） of the oxygen-storage materials （OSMs）; doping of Y decreases obviously the reduction temperature of catalysts; the doping of Mn and Y combines the advantages of doping of Mn and Y. MnOx/Ce0.40Zr0.40Mn0.10Y0.10Oy/ Al2O3 has the best catalytic performance. The complete conversion temperature of ethyl acetate over the catalyst is 513K and the temperature range between T10% and T100% is the smallest. This catalyst can be applied to abatement of ethyl acetate under conditions of wider range of inert concentration and higher gas hourly space velocity （GHSV）. Results of H2-temperature-programmed reduction（H2-TPR）and X-ray diffraction （XRD） analyses show that MnOx/Ce0.40Zr0.40Mn0.10Y0.10Oy/Al2O3 has lower reduction temperature and larger peak area. Mn and Y enter the lattice of ceria-zirconia solid solutions, which improves the textural properties and greatly promotes the MnOx dispersion on the support surface.

关 键 词：催化燃烧 挥发性有机化合物: 乙酸乙酯 MNOX 铈锆固溶体:掺杂 

分 类 号：O643.36[理学—物理化学]