Efficiency of temperature on Ce and La doping Cu modified IM-5 catalyst in DeNOx performance and SO2/ H2O resistance

Ce and La modified Cu/IM-5 (CuCeLa/IM-5) catalysts were prepared through ion exchange method, and they were used for NH3- SCR. The results exhibited that CuCeLa/IM-5 catalyst possessed the more excellent activity than other catalysts in the wide reaction temperature window (250-450 degrees C). This was because Ce and La boosted surface acidity and redox properties, which facilitated the formation of oxygen vacancies. Meanwhile, the relationship between NOx conversion and total acid amount was not significant at low reaction temperature. Nevertheless, the relationship between acidity amount and NOx conversion was positively correlated at high reaction temperature. More than anything, CuCeLa/IM-5 had excellent water resistance and sulfur dioxide resistance.