Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation

VOX/TiO2 catalysts with different vanadium loading were prepared in order to study the influence of species on effect water simultaneous NO reduction through NH3-SCR and o-DCB oxidation reactions. The presence isolated, polymeric crystalline their redox acid properties evaluated by N2-Adsorption, XRD, Raman, H2-TPR, XPS NH3-TPD. Water has a bimodal reversible both depending temperature. In SCR, detrimental at low temperature due competitive adsorption NH3, while high it promotes an increase conversion associated suppression side-reactions, which selectivity towards N2. oxidation, is sum two contributions: one positive, related removal surface adsorbed species; negative, o-DCB. Thus, acts as inhibitor, promotional highly dispersed tendency suffer deactivation, mainly carbonaceous materials. also favors total decreases formation chlorinated products.