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

A MnO _x /γ-Al₂O₃ 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-Al₂O₃ had the best denitration activity when the Mn loading was 4 wt% with a calcination temperature of 400 °C. The MnO _x /γ-Al₂O₃ catalyst ceramic filter (MA-CCF) was made by loading the CF twice with MnO _x /γ-Al₂O₃. 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 H₂O and SO₂. 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.

Insight on the anti-poisoning mechanism of in situ coupled sulfate over iron oxide catalysts in NOx reduction

In situ coupled sulfate uniquely migrated to the surface of iron oxide catalysts to capture metal poisons and thus maintained efficient adsorption and activation of NH3 and NOx reactants.

Selective catalytic reduction of NO over W–Zr-Ox/TiO2: performance study of hierarchical pore structure

A series of W–Zr-Ox/TiO2 catalysts with hierarchical pore structure were prepared and used for selective catalytic reduction of NO by NH3.