SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (1): 1-7.DOI: 10.1016/S1004-9541(13)60434-6

• 催化、动力学与反应工程 •    下一篇

Performance of V2O5-WO3-MoO3/TiO2 Catalyst for Selective Catalytic Reduction of NOx by NH3

高岩1,2, 栾涛1, 吕涛1, 程凯1, 徐宏明 2   

  1. 1 School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
    2 School of Mechanical Engineering, The University of Birmingham, Birmingham, B15 2TT, UK
  • 收稿日期:2012-04-23 修回日期:2012-11-19 出版日期:2013-02-28 发布日期:2013-02-04
  • 通讯作者: LUAN Tao
  • 基金资助:

    Supported by the Science and Technology Development Planning of Shandong Province (2011GSF11716), and China Scholarship Council for Researching in University of Birmingham.

Performance of V2O5-WO3-MoO3/TiO2 Catalyst for Selective Catalytic Reduction of NOx by NH3

GAO Yan1,2, LUAN Tao1, LV Tao1, CHENG Kai1, XU Hongming2   

  1. 1 School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
    2 School of Mechanical Engineering, The University of Birmingham, Birmingham, B15 2TT, UK
  • Received:2012-04-23 Revised:2012-11-19 Online:2013-02-28 Published:2013-02-04
  • Supported by:

    Supported by the Science and Technology Development Planning of Shandong Province (2011GSF11716), and China Scholarship Council for Researching in University of Birmingham.

摘要: The V2O5-WO3-MoO3/TiO2 honeycomb catalyst was prepared with industrial grade chemicals. The structural and physico-chemical properties were analyzed with X-ray diffraction (XRD), scanning electron micrograph (SEM) and mercury porosimetry. The NOx conversion and durability were investigated on a pilot plant test set under the actual operational conditions of a coal fired boiler. The catalyst monolith had good formability with mass percentage of V:W:Mo:TiO2:fiber glass 1: 4.5:4.5:72:18. Vanadium, tungsten and molybdenum species were highly dispersed on anatase TiO2 without causing the transformation of anatase TiO2 to rutile by calcining under a current of air at 450 °C for 4.5 h, but there were some degrees of crystal distortion. The catalyst particle sizes were almost uniform with close pile-up and the pore structure was regular with complete macro-pore formation and large specific surface area. The NOx conversion was sensitive to temperature but nearly insensitive to NH3. The catalyst showed strong adaptability to NOx concentration with activity above 80% in the range of 615-1640 mg·m-3. Within the range of 720-8640 h continuous operation, the NOx conversion dropped at a rate of about 1% reduction per 600 h.

关键词: selective catalytic reduction, V2O5-WO3-MoO3/TiO2 catalyst, physico-chemical property, flue gas, life time

Abstract: The V2O5-WO3-MoO3/TiO2 honeycomb catalyst was prepared with industrial grade chemicals. The structural and physico-chemical properties were analyzed with X-ray diffraction (XRD), scanning electron micrograph (SEM) and mercury porosimetry. The NOx conversion and durability were investigated on a pilot plant test set under the actual operational conditions of a coal fired boiler. The catalyst monolith had good formability with mass percentage of V:W:Mo:TiO2:fiber glass 1: 4.5:4.5:72:18. Vanadium, tungsten and molybdenum species were highly dispersed on anatase TiO2 without causing the transformation of anatase TiO2 to rutile by calcining under a current of air at 450 °C for 4.5 h, but there were some degrees of crystal distortion. The catalyst particle sizes were almost uniform with close pile-up and the pore structure was regular with complete macro-pore formation and large specific surface area. The NOx conversion was sensitive to temperature but nearly insensitive to NH3. The catalyst showed strong adaptability to NOx concentration with activity above 80% in the range of 615-1640 mg·m-3. Within the range of 720-8640 h continuous operation, the NOx conversion dropped at a rate of about 1% reduction per 600 h.

Key words: selective catalytic reduction, V2O5-WO3-MoO3/TiO2 catalyst, physico-chemical property, flue gas, life time