负载型复合氧化物催化剂催化燃烧氯苯性能研究  

Performance study on the catalytic combustion of chlorobenzene bysupported composite oxide catalysts

作　　者：梁川 朱磊 于鹏 李溪 徐炎华 刘志英 LIANG Chuan;ZHU Lei;YU Peng;LI Xi;XU Yanhua;LIU Zhiying(College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China;National Supervision and Testing Center of Fine Chemicals, Taizhou 225300, China)

机构地区：[1]南京工业大学环境科学与工程学院,南京211816 [2]国家精细化学品质量监督检验中心,江苏泰州225300

出　　处：《功能材料》2021年第5期5012-5017,共6页Journal of Functional Materials

基　　金：国家十三五重点研发课题资助项目(2017YFB0602500)。;2020年度重庆市出版专项资金资助项目

摘　　要：采用沉积-沉淀法制备了系列负载型Mn-Ce-Zr复合氧化物催化剂,考察了载体、摩尔比以及负载量对催化燃烧氯苯性能的影响,同时借助X射线衍射(XRD)、比表面积测定(BET)、氢气程序升温还原(H_(2)-TPR)、扫描电子显微镜(SEM)等表征手段研究了催化剂的理化性能。结果表明:以堇青石蜂窝陶瓷为载体、锰铈锆摩尔比为4∶1∶1、负载量为30%的条件制得的催化剂表现出最优的催化氧化性能,325℃下氯苯的转化率可达99%。研究发现,这与催化剂优异的氧化还原性能以及活性组分于载体的均匀分布密切相关。此外,催化剂对不同结构特性CVOCs的催化燃烧性能也进行了初步的比较研究。A series of supported Mn-Ce-Zr composite oxide catalysts are prepared by sedimentation-precipitation method to investigate the effects of support,molar ratio and load on the performance of catalytic combustion of chlorobenzene.The physical and chemical properties of the catalysts are characterized by X-ray diffraction(XRD),Brunner-Emmet-Teller(BET)measurements,hydrogen temperature-programmed reduction(H_(2)-TPR)and scanning electron microscope(SEM).The results show that the catalyst with cordierite honeycomb ceramic as the support,the molar ratio of manganese-ceria-zirconium at 4∶1∶1 and the loading capacity at 30%wt show the optimal catalytic oxidation performance,and the conversion rate of chlorobenzene at 325℃can reach 99%.It is found that this is closely related to the excellent REDOX performance of the catalyst and the homogeneous distribution of the active components on the support.In addition,a preliminary comparative study on the catalytic combustion performance of the catalysts on CVOCs with different structural properties is also carried out.

关 键 词：Mn-Ce-Zr复合氧化物 堇青石载体 催化燃烧 氯苯 含氯挥发性有机物 

分 类 号：X511[环境科学与工程—环境工程]