Simultaneous removal of NO and volatile organic compounds (VOCs) by Ce/Mo doping-modified selective catalytic reduction (SCR) catalysts in denitrification zone of coal-fired flue gas

A series of Ce/Mo doping-modified V-W/Ti type catalysts were prepared by one-step impregnation method, in an attempt to realize collaborative removal of NO and volatile organic compounds (VOCs) in selective catalytic reduction (SCR) reaction zone (the temperature scope of 260-420 °C). Benzene and Toluene were used as model compounds of VOCs. A self-built experimental platform was conducted to simulate the coal-fired flue gas denitrification zone with a flue gas of 750 mL/min. Different loading amount of CeO2 (0-17.5 wt%) or MoO3 (3-7.5 wt%) and different calcination temperature (400-600 °C) during catalyst preparation were investigated. Results showed that 10.75 wt% CeO2 loading as well as 4.5 wt% MoO3 loading on V-W/Ti catalyst calcinated at 500 °C represented the best simultaneous removal effect of NO, benzene and toluene. This study provided an efficient method for pollutant reductions of coal-fired power plant.