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Research progress on SCR catalysts for the synergistic removal of NO andVOCs from coal-fired power plants flue gas: A review

Received Date:2023-02-23

DOI:10.20078/j.eep.20230301

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    Abstract:NOx and VOCs emissions from coal-fired power plants account for roughly 30% of anthropo⁃genic emissions and provide a se... Open+
    Abstract:NOx and VOCs emissions from coal-fired power plants account for roughly 30% of anthropo⁃genic emissions and provide a severe challenge to air quality protection. Synergistic NO and VOCs re⁃moval from coal-fired power plants flue gas in the SCR zone can efficiently cut treatment costs, whichneeds scientific investigation and is of environmental benefits. This review describes the latest researchdevelopment of SCR catalysts for the synergistic removal of NO and VOCs from coal-fired power plantflue gas. Currently, the studies are mainly associated with impregnation method, co-precipitation meth⁃od, hydrothermal method, sol-gel method, template method and other ways to prepare multifunctionalcatalysts. Doping with transition metals/ nobel metals or selecting appropriate carriers will dramaticallyincrease the amounts of acidic sites and reactive oxygen species on the surface, resulting in a rapid risein synergistic removal capacity. However, multiple pollutants in the actual flue gas will interact on thecatalyst surface. The interaction mechanism of multiple reactants and the effect of reaction conditions onthe synergistic removal rate have also been focused on. To address the problems and challenges of cur⁃rent research, two powerful tools, in situ technology and DFT, can be applied to explore the synergisticcatalytic reaction pathways and deactivation mechanisms, guiding the design of SCR catalysts with goodredox activity, low by-products, high resistance to toxicity and regeneration. Current research on syn⁃ergistic NO and VOCs elimination is mainly conducted in the laboratory. In the future, the theory ofmulti-pollutant synergistic control should be improved to realize the practical engineering applicationsfor the synergistic removal of NOx and VOCs from complex flue gases. Close-

    Authors:

    • CHEN Yin1,2
    • LIAO Yanfen1,2,*
    • MA Xiaoqian1,2

    Units

    • 1. School of Electric Power, South China University of Technology, Guangzhou 510640, China
    • 2. GuangdongProvince Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou 510640, China

    Keywords

    • Nitrogen oxides
    • Volatile organic compounds
    • Synergistic removal
    • SCR catalysts

    Citation

    CHEN Yin, LIAO Yanfen, MA Xiaoqian. Research progress on SCR catalysts for the synergistic removal of NOand VOCs from coal-fired power plants flue gas: A review[J]. Energy Environmental Protection, 2023, 37(2):85-97.
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