Study of the denitration performance of a ceramic filter using a manganese-based catalyst

A MnO(x)/γ-Al(2)O(3) catalyst was prepared by impregnation of manganese acetate and alumina. After optimizing the composition, it was loaded into a ceramic filter (CF) by a one-step coating method. The results show that MnO(x)/γ-Al(2)O(3) had the best denitration activity when the Mn loading was 4 wt% with a calcination temperature of 400 °C. The MnO(x)/γ-Al(2)O(3) catalyst ceramic filter (MA-CCF) was made by loading the CF twice with MnO(x)/γ-Al(2)O(3). When face velocity (FV) was 1 m min(−1), MA-CCF displayed more than 80% NO conversion at 125–375 °C and possessed a good resistance of H(2)O and SO(2). The abundant surface adsorbed oxygen, dense membrane and high-density fiber structure on the outer layer of CF effectively protected the catalyst and could improve MA-CCF denitration activity. The multiple advantages of MA-CCF made it possible for good application prospects.