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Influence of Fe Doping on Ce-Mn/TiO2-ZrO2 Catalysts for Low-Temperature Selective Catalytic Reduction of NO

Fe-Ce-Mn catalysts loaded on TiO2-ZrO2 materials were prepared by sol-gel method and then were investigated for low temperature selective catalytic reduction (SCR) of NO with NH3. It was found that the NO conversions over Fe-Ce-Mn/TiO2-ZrO2 was slightly improved compared with that over Ce-Mn/TiO2-ZrO2. The results showed that 96% NO conversion was obtained over Fe-Ce-Mn/TiO2-ZrO2 with the molar ratio of Fe/Mn=0.3. A comparative study of Fe-Ce-Mn/TiO2- ZrO2 and Ce-Mn/TiO2-ZrO2 for NO conversions at 140°C in the presence of H2O and SO2 proved that Fe-Ce-Mn/TiO2-ZrO2 exhibited higher resistance to H2O and SO2 than that of without Fe catalysts. In addition, Fe-Ce-Mn/TiO2-ZrO2 presented 90.49% NO conversion after cutting off the injection of SO2 and H2O.