Regeneration of commercial SCR catalyst deactivated by arsenic poisoning in coal-fired power plants

  • Qiang LuEmail author
  • Zulfiqar Ali
  • Hao Tang
  • Tahir Iqbal
  • Zulqarnain Arain
  • Min-shu Cui
  • Ding-jia Liu
  • Wen-yan Li
  • Yong-ping Yang


Arsenic species, which are inevitable components in flue gas from the coal combustion process, will result in severe deactivation of selective catalytic reduction (SCR) catalysts. In this paper, a novel method is proposed to regenerate the arsenic-poisoned commercial V2O5-MoO3/TiO2 catalyst collected from coal-fired power plants, including ammonia washing, H2 reduction, and air calcination. Activity tests indicated that the proposed method could recover the catalyst activity more than 96% of the fresh catalyst. Furthermore, detailed characterizations results indicated that this regeneration method could not only effectively remove the arsenic species, but also recover the active constituents of the catalysts to a considerable level. The proposed method offers a feasible strategy for the regeneration of poisoned commercial SCR catalysts and can effectively reduce the total denitrification cost for coal-fired power plants.


SCR Catalyst Deactivation Regeneration Arsenic V2O5-MoO3/TiO2 


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Copyright information

© Korean Institute of Chemical Engineers, Seoul, Korea 2019

Authors and Affiliations

  • Qiang Lu
    • 1
    Email author
  • Zulfiqar Ali
    • 1
  • Hao Tang
    • 1
  • Tahir Iqbal
    • 1
  • Zulqarnain Arain
    • 2
  • Min-shu Cui
    • 1
  • Ding-jia Liu
    • 1
  • Wen-yan Li
    • 1
  • Yong-ping Yang
    • 1
  1. 1.National Engineering Laboratory for Biomass Power Generation EquipmentNorth China Electric Power UniversityBeijingChina
  2. 2.Department of Energy System EngineeringSukkur IBA UniversitySukkurPakistan

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