Achieving multiple pollutants control via SCR process: efficacy of VMT catalyst.

Simultaneous removal of multiple pollutants from industrial emissions offers significant cost and space savings when upgrading air pollution control devices. Sintering processes emit complex pollutant mixtures including SOx, NO, volatile organic compounds (VOCs), and dioxins (PCDD/Fs). This study evaluates the simultaneous removal of NO, PCDD/Fs, and toluene using three commercial V2O5-MoO3/TiO2 (VMT) selective catalytic reduction (SCR) catalysts, under simulated flue gas conditions at 220 °C. The catalysts designated Cat-1, Cat-2, and Cat-3 differed in composition, including variations in MoO3, V2O5, and the addition of SiO2 or WO3. The effects of H2O(g) and SO2 were also evaluated to assess catalyst stability and resistance to poisoning. Cat-1, with the highest MoO3 content, achieved the best overall performance with removal efficiencies of 93.1% for PCDD/Fs, 83.3% for NO, and 84.6% for toluene. Cat-2, containing sulfur-resistant SiO2 and WO3, demonstrated superior NO and PCDD/Fs removal in the presence of H2O(g) and SO2. Cat-3, with the highest V2O5 content, exhibited the highest NO conversion when H2O(g) and SO2 were absent, and its performance was minimally affected by co-pollutants. This work confirms the efficacy of VMT catalysts for multipollutant control, highlighting their potential for industrial applications.