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

doi:10.1016/S1004-9541(13)60434-6

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 NO_x by NH₃

高岩^1,2, 栾涛¹, 吕涛¹, 程凯¹, 徐宏明 ²

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 NO_x by NH₃

GAO Yan^1,2, LUAN Tao¹, LV Tao¹, CHENG Kai¹, XU Hongming²

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/Abstract

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 NO_x 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 NO_x conversion was sensitive to temperature but nearly insensitive to NH₃. The catalyst showed strong adaptability to NO_x concentration with activity above 80% in the range of 615-1640 mg·m^-3. Within the range of 720-8640 h continuous operation, the NO_x 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 NO_x 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 NO_x conversion was sensitive to temperature but nearly insensitive to NH₃. The catalyst showed strong adaptability to NO_x concentration with activity above 80% in the range of 615-1640 mg·m^-3. Within the range of 720-8640 h continuous operation, the NO_x 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

高岩, 栾涛, 吕涛, 程凯, 徐宏明 . Performance of V₂O₅-WO₃-MoO₃/TiO₂ Catalyst for Selective Catalytic Reduction of NO_x by NH₃[J]. Chinese Journal of Chemical Engineering, 2013, 21(1): 1-7.

GAO Yan, LUAN Tao, LV Tao, CHENG Kai, XU Hongming. Performance of V₂O₅-WO₃-MoO₃/TiO₂ Catalyst for Selective Catalytic Reduction of NO_x by NH₃[J]. Chin.J.Chem.Eng., 2013, 21(1): 1-7.

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

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

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