La-M-Co-O/堇青石催化剂的制备及催化氧化氯苯  

Study on the preparation and catalytic oxidation of chlorobenzene over La-M-Co-O/cordierite catalysts

作　　者：司涵 黄琼[1,2,3] 陶涛[1,3,4] 杨波[1,2,3] 赵云霞 陈敏东[1,2,3] SI Han;HUANG Qiong;TAO Tao;YANG Bo;ZHAO Yun-xia;CHEN Min-dong(Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies,Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Environmental Science&Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China;Jiangsu Key Laboratory of Atmospheric Environmental Monitoring&Pollution Control,Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Chemistry and Materials Science,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学江苏省大气环境与装备技术协同创新中心,江苏南京210044 [2]南京信息工程大学环境科学与工程学院,江苏南京210044 [3]南京信息工程大学江苏省大气环境监测与污染控制高技术研究实验室,江苏南京210044 [4]南京信息工程大学化学与材料学院,江苏南京210044

出　　处：《中国环境科学》2020年第10期4314-4322,共9页China Environmental Science

基　　金：江苏省自然科学基金资助项目(BK20170954,BK20150890);国家自然科学基金资助项目(21501097);江苏省高校优势学科建设工程资助项目(PAPD);江苏高校品牌专业建设工程资助项目(PPZY2015C222)。

摘　　要：采用柠檬酸络合法制备La-M-Co-O(M=Mn,Cr,Fe,Ni和Cu)/堇青石催化剂,运用BET,XRD,SEM,H2-TPR和XPS技术对催化剂性能及微观结构进行表征分析,研究考察过渡金属掺杂,掺杂量以及焙烧温度等对催化剂催化氧化性能的影响.结果表明,随着催化剂焙烧温度升高至650℃时,催化剂表面所负载的活性氧化物颗粒最为分散,其氧化活性最佳,且当反应温度为350℃时,催化剂催化氧化氯苯转化率可达96.4%,究其原因是高温焙烧致使催化剂形成LaCoO3钙钛矿型复合氧化物,其复合氧化物的晶体结构有利于催化剂催化氧化氯苯性能的提高.La-M-Co-O(M=Mn,Cr,Fe,Ni and Cu)/cordierite catalysts were prepared by complexation method with citric acid.BET,XRD,SEM,H2-TPR and XPS technologies were used to characterize and analyze the performance and microstructure of these catalysts.Meanwhile,the influences of the types of transition metal,the amount transition metal and calcination temperature were studied.The results show that when the calcination temperature was 650℃,the active oxide particles supported on the surface of the catalysts were the most dispersed and displayed the best activity for chlorobenzene oxidation.And when the reaction temperature was 350℃,the conversion rate is as high as 96.4%.The main reason was that the catalysts displayed the structure of LaCoO3 perovskite composite oxides attribute to the high calcination temperature,which was beneficial for improving the performance of catalytic oxidation of chlorobenzene over composite catalysts.

关 键 词：催化氧化 含氯挥发性有机物 催化剂 钙钛矿型复合氧化物 

分 类 号：X701.7[环境科学与工程—环境工程]