关键词: 低温, 选择性催化还原, 制备方法, 烟气脱硝, 抗硫性能

Abstract: Low-temperature denitration catalyst Mn-Fe-Ce/TiO2 was prepared by impregnation，coprecipitation and sol-gel methods. The effects of preparation methods on denitrification performance were studied and the preparation conditions were optimized. X-ray diffraction (XRD) and transmission electron microscope (TEM) were used to determine the characteristics of the catalyst. The effect of SO2 concentration on its performance was also studied. The catalyst pepared by the sol-gel method (load capacity 30%，catalyst molar ratio of Mn/Fe/Ce 4∶1∶0.1，calcination temperature 500 ℃) showed higher denitrification rate and its activity reached more than 96%. The crystal of the catalyst carrier was anatase TiO2，but FeOx，CeOx remained amorphous structure. The poisoned catalyst self-repaired when the concentration of SO2 was less than 70 mg/m3 after stopping addition of SO2 into flue gas，and it was poisoned permanently when the SO2 was greater than 70 mg/m3.

Key words: low tempreture, selective catalystic reduction, preparation method, flue gas denitration, sulfur resistant property