Simultaneous removal of NO and N2O over commercial V2O5-MoO3/TiO2 catalyst modified with bismuth-nickel oxides

Abstract In this study, a series of commercial V2O5-MoO3/TiO2 catalysts modified with Bi-Ni mixed metal oxides were prepared and tested for NO and N2O simultaneous removal. It was found that the catalytic decomposition of N2O was dramatically promoted over the modified SCR catalyst with 40 wt% of Bi-Ni mixed metal oxides, in which the efficiencies of NO and N2O removal were maintained over 90% and 80% respectively. Besides, the physical and chemical properties of the modified SCR catalyst were systematically characterized. It was confirmed that the doping of Bi-Ni mixed metal oxides could promote the oxygen vacancies over the surface of V2O5-MoO3/TiO2 catalyst, thereby facilitating the decomposition of N2O. Whereas, the surface acid sites for NH3 adsorption and the ratio of V5+ was decreased remarkably with the presence of Bi-Ni species, which partly suppressed the activity of NO catalytic reduction.