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Citation: LIN Zhuo-wei, LU Qiang, TANG Hao, LI Hui, DONG Chang-qing, YANG Yong-ping. Research on the middle-low temperature denitration and anti-poisoning properties of plate V2O5-MoO3/TiO2 SCR catalysts[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(1): 113-122. shu

Research on the middle-low temperature denitration and anti-poisoning properties of plate V2O5-MoO3/TiO2 SCR catalysts

  • National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China

  • Corresponding author: LU Qiang, qianglu@mail.ustc.edu.cn
  • Received Date: 29 August 2016
    Revised Date: 16 November 2016

    Fund Project: Major State Basic Research Development Program of China 973 projectMajor State Basic Research Development Program of China 2015CB251501Fundamental Research Funds for the Central Universities 2015ZZD02Fundamental Research Funds for the Central Universities 2016YQ05

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  • Considering the technical requirements for middle-low temperature denitration of flue gas, a series of powder and plate type V2O5-MoO3/TiO2 SCR catalysts were prepared using incipient wetness impregnation method with V2O5 as the active component and with MoO3 as the promoter. Experiments were performed to investigate the effects of active component and promoter contents of the catalysts on the activities and the resistance to deactivation by SO2 and H2O. The characterization of the fresh and used catalysts was conducted, and the optimal catalyst was further studied to reveal the denitration performance under different flue gas conditions. The results indicate that the activities of the catalysts are enhanced with the increase of V2O5 loadings. Also, the addition of MoO3 can promote the catalytic activity. The characterization results from XRF, XPS, FT-IR and other analysis suggest that the MoO3 content could affect the V4+/V5+ ratio in the catalyst. The increase in relative MoO3 content is favorable for the formation of non-stoichiometry vanadium species as well as the rise of chemical adsorption oxygen. Therefore, the interactions between molybdenum and vanadium species might be an essential reason for the resistance to the deactivation by SO2 and H2O. The denitrification efficiency of 3V2O5-10MoO3/TiO2 plate catalyst keeps steady around 82% after 30 days test in the presence of SO2 and H2O at temperature of 200℃ and space velocity of 3 500 h-1. The catalyst is identified to have an excellent resistance to the deactivation by SO2 and H2O under middle-low temperatures.
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