Fe Promotion Effect in Mn-Zr-Fe/Al2O3 for Low -temperature Selective Catalytic Reduction of NO with NH3

The influence of Fe in catalyst for low-temperature selective catalytic reduction of NO with NH₃ was investigated via altering the loading of Fe. A series of catalysts were prepared by impregnation method. The results show that the loading of Fe could improve the catalytic performance of the catalyst at low temperature. The removal efficiency of NOx could exceed 95% at the range of 150~230°C with 5Mn-5Zr-10Fe/Al₂O₃ as catalyst. As the coexistence of Fe, Mn, Zr oxides enhance their dispersion on the carrier, there is not obvious oxide crystal on the catalyst. The specific surface area of catalyst can increase by loading of Fe. Consequently, the NH₃ adsorption properties might promote and low-temperature catalytic performance of catalyst can enhance.