Abstract: The Fe-Mn/TiO2 catalysts for low-temperature denitration with different dosages of Fe were prepared by oxidation precipitation-impregnation method.The catalytic activity was discussed at 80-180 ℃.The physical and chemical properties were characterized using XRD, BET, TG, H2-TPR, NH3-TPD.The results show that there is no change in main crystal phase of Mn/TiO2 along with the addition of Fe and the main crystal phase is still anatase while FeOx and MnOx highly dispersed on the carrier surface with amorphous structure.According to the results analysis, it turns out that the micro-structure and surface acidity could be improved effectively with the addition of Fe.Catalyst dispersion, specific surface area and the amount of Bronsted acid sites are increase significantly, accordingly leading to the improvement in catalytic activity.Specifically, the NO conversion of 0.10 Fe-Mn/TiO2 could be up to 90; at 120 ℃.

Key words: The Fe-Mn/TiO2 catalysts for low-temperature denitration with different dosages of Fe were prepared by oxidation precipitation-impregnation method.The catalytic activity was discussed at 80-180 ℃.The physical and chemical properties were characterized using XRD, BET, TG, H2-TPR, NH3-TPD.The results show that there is no change in main crystal phase of Mn/TiO2 along with the addition of Fe and the main crystal phase is still anatase while FeOx and MnOx highly dispersed on the carrier surface with amorphous structure.According to the results analysis, it turns out that the micro-structure and surface acidity could be improved effectively with the addition of Fe.Catalyst dispersion, specific surface area and the amount of Bronsted acid sites are increase significantly, accordingly leading to the improvement in catalytic activity.Specifically, the NO conversion of 0.10 Fe-Mn/TiO2 could be up to 90; at 120 ℃.