Enhancement of performance and sulfur resistance of Si-doped V/W/Ti using sulfation for selective catalytic reduction of NOx with ammonia

HIGHLIGHTS: The SO2 resistance improvement factor was confirmed to form Si2+(Si-O-Ti) species.In the optimised V/SiW/TiO2 catalyst; the incoming SO2 was converted to Si(SO4).The formation of Si(SO4) increased active sites for adsorbed NH3, in the form of SO4-NH3 to improve denitrification efficiency