Electrolytic manganese anode mud is a promising low temperature SCR catalyst. In this study, the effect of Pb and K ion in EMAM on the low temperature was investigated via experimental and DFT method. Pb modification can improve the surface unsaturation so that the oxidation ability of MnO2 is improved. Therefore, ammonia is easily oxidated on the surface of Pb-MnO2. K ion can moderate the surface of MnO2 and lower the energy barrier of dehydrogenation for low temperature SCR process. However, Pb can inhibit N2O formation thereby improve the N2 selectivity.
Keywords Low temperature SCR, Electrolytic manganese anode mud, Lead, Potassium