Mn0.4/Co0.1Ce0.45Zr0.45Ox, high performance catalyst for selective catalytic reduction of NO by ammonia

Mn-0.4/Co0.1Ce0.45Zr0.45Ox was prepared by introducing Co into Mn/Ce-ZrOx and was used for low temperature selective catalytic reduction (SCR) of NO with NH3 at different reaction conditions. X-ray diffraction, temperature programmed desorption and temperature programmed reduction were performed to character the physicochemical property of the catalyst and supports. Experimental results showed that the introduction of Co increased the surface acidity and improved the redox properties of the catalysts. Mn-0.4/Co0.1Ce0.45Zr0.45Ox produced a good activity at low temperature, and the NO conversion of the catalyst was >90% in the temperature range of 120-220 degrees C. Furthermore, Mn-0.4/Co0.1Ce0.45Zr0.45Ox showed an excellent resistance to SO2 and H2O at different reaction conditions. The catalytic activity was stable during the treatment of SO2 and H2O, and the activity recovered to the original level after cutting off the injection of SO2 and H2O. Therefore, Mn-0.4/Co0.1Ce0.45Zr0.45Ox is a promising catalyst for the SCR in NO by ammonia.