不同方法制备的Cu/OMS-2催化剂上甲苯催化氧化性能研究  

Catalytic Oxidation of Toluene Over Cu-modified Manganese Oxide Octahedral Molecular Sieves Synthesized with Different Methods

作　　者：胡明华[1] 岳琳[1] 郭矩成 王雯君 HU Minghua;YUE Lin;GUO Jucheng;WANG Wenjun(Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,School of Chemical and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei,China)

机构地区：[1]江汉大学工业烟尘污染控制湖北省重点实验室化学与环境工程学院,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2019年第1期5-11,共7页Journal of Jianghan University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21407062;21477095;21677114;21577046)

摘　　要：利用不同方法制备了Cu负载OMS-2分子筛材料,并测试其催化氧化甲苯的性能,发现催化活性表现为:OMS-2> Cu/OMS-2(离子交换法)> Cu/OMS-2(前处理法)。其中OMS-2具有最好的催化性能,T90%(甲苯转化率为90%时的催化氧化温度)为225℃。由材料表征结果分析可知,Cu的加入减少了OMS-2催化剂表面Mn3+/Mn4+电子对的数量,降低了催化剂的还原性和表面氧移动性,导致Cu/OMS-2催化性能相比OMS-2有所降低。Cu/OMS-2 catalysts were prepared with different methods,and their catalytic performance was investigated for the oxidation of toluene.The catalytic activity was revealed as sequence below:OMS-2 >Cu/OMS-2(ion exchange method) >Cu/OMS-2(pretreatment method).It was found that OMS-2 had best catalytic performance;it achieved 90%toluene conversion at 225℃due to the better reducibility.The material characterization results showed the addition of Cu reduced the Mn^3+/Mn^4+electron pairs on the surface of OMS-2 catalyst,it reduced the reducibility and oxygen mobility on the surface of OMS-2 catalyst,which led to the decrease of catalytic performance of Cu/OMS-2 compared with OMS-2.

关 键 词：Cu/OMS-2 催化氧化 甲苯 氧化还原电对 VOCS 

分 类 号：TQ426.8[化学工程]