Chlorobenzene (CB) and nitrogen oxides (NO_x) are the main reasons for deteriorating air quality and become the focus of air pollution control in the new era.Although the V_2O_5/Ti O_2 catalyst can catalytically reduce NO_x and oxidize CB

its active temperature window overlaps in a narrow range.In this paper

the Ce O_2-WO_3/Ti O_2catalyst was prepared by impregnation method

and the effect of calcination temperature on the catalytic performance

as well as the performance of the catalyst for synergistic removal of NO_x and CB at 250～550℃were investigated.The results showed that

high temperature calcination promoted the transformation of Ti O_2 from anatase phase to rutile phase

reduced the specific surface area

surface acid content and redox performance

which seriously reduced the catalyst activity.CW/T-600 catalyst had excellent redox performance

large specific surface area and abundant surface acidic sites

so it exhibited excellent performance for synergistic removal of NO_x and chlorobenzene.At the same time

NH_4~+and-NH_2 were the main ammonia species in the selective catalytic reaction(SCR)

and-NO_2 was the main NO adsorption species

so the reaction on the CW/T-600 catalyst followed the L-H mechanism.Quinones

phenols and acetate-type carboxylates were the main intermediate species in the catalytic degradation of chlorobenzene.