Ce-Mn/SiO2臭氧催化剂的制备与表征  

Preparation and Characterization of Ce-Mn/SiO2 Ozone Catalysts

作　　者：卞成萍[1] 王晓峰[1] 陈远[1] Bian Chengping;Wang Xiaofeng;Chen Yuan(Tarim Oil Field Branch,PetroChina Co.,Ltd.)

机构地区：[1]中国石油天然气股份有限公司塔里木油田分公司

出　　处：《油气田环境保护》2020年第5期36-39,77,共5页Environmental Protection of Oil & Gas Fields

摘　　要：以SiO2为载体,采用浸渍法负载MnO2和CeO2制备Ce-Mn/SiO2臭氧催化剂,以塔里木油田钻井废水COD去除率为评价指标,考察催化剂的制备工艺条件(焙烧温度、焙烧时间、MnO2负载量、CeO2负载量)。结果表明:在焙烧温度为480℃,焙烧时间为4 h,MnO2负载量为15%、CeO2负载量为13.22%(n(Ce)与n(Mn)之比为37)的条件下制备的Ce-Mn/SiO2臭氧催化剂对COD的去除率达到78.20%,5次重复使用后COD去除率仍在72%以上,具有一定的稳定性。通过表征发现,Ce-Mn/SiO2臭氧催化剂载体SiO2以α-石英晶相的形式存在,MnO2和CeO2成功地负载到SiO2表面,并均匀分布在载体表面。The Ce-Mn/SiO2 Ozone catalyst was prepared by the impregnating MnO2 and CeO2 on SiO2.By taking the removal efficiency of COD in drilling wastewater from Tarim Oilfield as the research object,the preparation conditions,namely calcination temperature,calcination time,loading of MnO2 and loading of CeO2,were investigated during the process.The experimental results showed Ce-Mn/SiO2 had the best catalytic effect with COD removal rate of 78.20%under the conditions of calcination temperature 480℃,calcination time 4 h,the loading of MnO215%and the loading of CeO213.22%(the ration(Ce)n(Mn)=37).It showed good stability which the COD removal ratio reached over 72%after the catalyst repeatedly used for 5 times.The characterization results showed that the form of SiO2 isα-quartz,and MnO2 and CeO2 were distribution uniformly on the surface of SiO2.

关 键 词：Ce-Mn/SiO2臭氧催化剂 钻井废水 COD去除率 

分 类 号：X741[环境科学与工程—环境工程]