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›› 2008, Vol. 8 ›› Issue (6): 1204-1212.

• 材料工程专栏 • 上一篇    下一篇

低温高活性NO氧化催化剂Mn-V-Ce/TiO2的制备与性能

郑足红 童华 童志权 张俊丰 黄妍   

  1. 湘潭大学环境科学与工程系 北京化工大学环境工程系 湘潭大学环境工程系 湘潭大学环境工程系
  • 收稿日期:2008-09-04 修回日期:2008-10-10 出版日期:2008-12-20 发布日期:2008-12-20
  • 通讯作者: 童志权

Preparation of Low Temperature and High Activity Mn-V-Ce/TiO2 Catalyst and Its Catalytic Performance on NO Oxidation

ZHENG Zu-hong TONG Hua TONG Zhi-quan ZHANG Jun-feng HAUNG Yan   

  1. Department of Environmental Science and Engineering, Xiangtan University Beijing University of Chemical Technology Environmental Engineering Department of Xiangtan University Environmental Engineering Department of Xiangtan University
  • Received:2008-09-04 Revised:2008-10-10 Online:2008-12-20 Published:2008-12-20
  • Contact: TONG Zhi-quan

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6 h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8000 h-1、温度200℃或空速5000 h-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℃、8000 h-1时,氧化度可达74%;250℃、5000 h-1时,氧化度可达86.6%.

关键词: 低温, 高活性, Mn-V-Ce/TiO2, 催化氧化, NO, 制备

Abstract: 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%V2O5-20%CeO2/TiO2 at 300℃ for 6 h can obtain the optimal catalytic oxidation activity. When the volume fraction of NO is 5′10-4(j), O2 10%, space velocity 8000 or 5000 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 8000 and 5000 h-1, the oxidation rate is about 74% and 86.6%, respectively.

Key words: low temperature, high activity, Mn-V-Ce/TiO2, catalytic oxidation, nitric oxide, preparation

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