Cu-VWT Catalysts for Synergistic Elimination of NOₓ and Volatile Organic Compounds from Coal-Fired Flue Gas
2022
Xiao, Gaofei | Guo, Ziyang | Lin, Beilong | Fu, Mingli | Ye, Daiqi | Hu, Yun
A dual-function catalyst, designated as Cu5-VWT, has been constructed for the synergistic removal of NOₓ and volatile organic compounds under complex coal-fired flue gas conditions. The removal of toluene, propylene, dichloromethane, and naphthalene all exceeded 99% (350 °C), and the catalyst could effectively block the generation of polycyclic aromatic hydrocarbons. Mechanistic studies have shown that Cu sites on the Cu5-VWT catalyst facilitate catalytic oxidation, while V sites facilitate NOₓ reduction. Thus, toluene oxidation and NOₓ reduction can proceed simultaneously. The removal of total hydrocarbons and nonmethane total hydrocarbons from 1200 m³·h–¹ real coal-fired flue gas by a monolithic catalyst were determined as 92 and 96%, respectively, much higher than those of 54 and 72% over a commercial VWT catalyst, indicating great promise for industrial application.
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