Improvement of Al 2 O 3 on the multi-pollutant control performance of NO x and chlorobenzene in vanadia-based catalysts

We compared the influences of Al O and SiO on a traditional V O -MoO /TiO for the simultaneous removal of NO and chlorobenzene (CB). The Al O doping catalyst considerably broadens the active temperature window with higher NO reduction and CB oxidation efficiencies than the SiO doping one and the V O -MoO /TiO . Furthermore, its resistance to SO was preserved and the quantities of polychlorinated byproducts also decreased. The increase in activity at low temperatures could be due to the promotion of vanadia reducibility via interactions between V O and Al O . Moreover, the high temperature activity could be due to the additional surface acidities provided by Al O , in which the Lewis acid sites played the predominant role in both NH adsorptions and CB de-chlorination compared to the Brønsted acid sites. Finally, we proposed that Al O is an effective addition for vanadia-based catalyst in NO and CB simultaneous removal from stationary sources.