Multi-pollutant control (MPC) of NO and chlorobenzene from industrial furnaces using a vanadia-based SCR catalyst

Abstract NO and chlorobenzene (CB) coexist in the flue gas of industrial furnaces from waste incineration and iron sintering. We design the strategy to remove them simultaneously via SCR and catalytic combustion together (multi-pollutant control, MPC). The V5Mo5Ti exhibits excellent activity with 100 % NO conversions in 200–400 °C and 95 % CB conversions above 300 °C. 2,3-dichloromaleic anhydride (DCMA) and acetate are the primary intermediates during the CB oxidation, while the sum of 17 kinds of PCDD/Fs on the V5Mo5Ti is 0.0115 ng·I-TEQ·Nm−3. Partial DCMA is not deeply oxidized into CO2, reducing the COx selectivity below 350 °C. The final products of the accumulated species above 800 °C desorption are CCl4 and C2Cl4, generated from the hydrogenation of intermediates. The Cl desorption mainly occurs in two zones: HCl in 200–500 °C from CB oxidation and CCl4 and C2Cl4 above 800 °C from surface hydrocarbon decomposition.