低温高活性NO氧化催化剂Mn-V-Ce／TiO2的制备与性能  

Preparation of Low Temperature and High Activity Mn-V-Ce/TiO_2 Catalyst and Its Catalytic Performance on NO Oxidation

作　　者：郑足红[1] 童华[2] 童志权[1] 张俊丰[1] 黄妍[1] 

机构地区：[1]湘潭大学环境科学与工程系,湖南湘潭411105 [2]北京化工大学环境工程系,北京100029

出　　处：《过程工程学报》2008年第6期1204-1212,共9页The Chinese Journal of Process Engineering

基　　金：湖南省自然科学基金资助项目(编号:07JJ4003)

摘　　要：采用浸渍法制备了新型NO氧化催化剂Mn-V-Ce/TiO2,考察了组分配比、载体种类、焙烧温度等制备条件和反应温度、NO进口体积分数、O2含量、空速等操作条件对其催化活性的影响,对载体和催化剂分别进行了BET和XRD分析.结果表明,10%Mn-3%V2O5-20%CeO2/TiO2在300℃焙烧6h得到的Mn-V-Ce/TiO2具有最佳催化氧化活性,NO体积分数500×10-6,O2体积分数10%;空速8000h-1、温度200℃或空速5000h-1、温度175℃条件下,出口NOx的氧化度(NO2/NOx)均达到50%～60%,NOx能取得最大的吸收效率;250℃、8000h-1时,氧化度可达74%;250℃、5000h-1时,氧化度可达86.6%.A novel Mn-V-Ce/TiO2 catalyst for catalytic oxidation of nitric oxide was prepared by impregnation method. The effects of loading, carrier, calcining temperature, volume fractions of NO and O2, and space velocity on Mn-V-Ce/TiO2 catalytic oxidation of nitric oxide were studied, and the catalysts were characterized by BET and XRD analysis. The results show that the catalyst from calcination of 10%Mn-3%V2Os-20%CeO2/TiO2 at 300 ℃ for 6 h can obtain the optimal catalytic oxidation activity. When the volume fraction of NO is 5×10^-4（φ）, 02 10%, space velocity 8 000 or 5 000 h^-1, the oxidation rate （NO2/NOx） reaches 50%-60% at 200 or 175 ℃, respectively, and the highest absorption efficiency of NOx is gained. At the temperature of 250 ℃, space velocity 8 000 and 5 000 h^-1, the oxidation rate is about 74% and 86.6%, respectively.

关 键 词：低温 高活性 Mn—V-Ce/TiO2 催化氧化 NO 制备 

分 类 号：X5[环境科学与工程—环境工程]