| Summary: | The Fe-Mn based catalyst was loaded on porous ceramic filter with impregnation method to prepare a catalytic ceramic filter which integrates the denitration and dust removal at low temperature. The effect of the Fe/Mn ratio and doping Sm on the catalytic performance of Fe-Mn based catalyst were studied. In the temperature range of 120 °C–220 °C, the Fe _2 Mn _1 Sm _0.2 O _x catalytic filter exhibited over 90% NO removal efficiency. When 100 ppm SO _2 and 7vol.% H _2 O in the flue gas, the NO removal efficiency still maintained above 89% at 200 °C. These results proved that the Fe _2 Mn _1 Sm _0.2 O _x catalytic filter has excellent catalytic performance and excellent H _2 O and SO _2 resistance at low temperature. In addition, the dust collection efficiency reached 99.99%. The NH _3 -TPD, H _2 -TPR and XPS confirmed that the Fe _2 Mn _1 O _x catalysts doped with Sm have stronger surface acid, more surface absorbed oxygen and more oxygen vacancy, which lead to higher NH _3 -SCR activity and better SO _2 and H _2 O resistance.
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