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The selective catalytic oxidation (SCO) of NO was studied on a catalyst consisting of iron-manganese oxide supported on mesoporous silica (MPS) with different Mn/Fe ratios. Effects of the amount of manganese and iron, oxygen, and calcination temperature on NO conversion were also investigated. It was found that the Mn-Fe/MPS catalyst with a Mn/Fe molar ratio of 1 showed the highest activity at the calcination temperature of 400 °C. The results showed that over this catalyst, NO conversion reached 70% under the condition of 280 °C and a space velocity of 5000 h-1. SO2 and H2O had no adverse impact on the reaction activity when the SCO reaction temperature was above 240 °C. In addition, the SCO activity was suppressed gradually in the presence of SO2 and H2O below 240 °C, and such an effect was reversible after heating treatment.
The selective catalytic oxidation (SCO) of NO was studied on a catalyst consisting of iron-manganese oxide supported on mesoporous silica (MPS) with different Mn / Fe ratios. Effects of the amount of manganese and iron, oxygen, and calcination temperature on NO It was found that the Mn-Fe / MPS catalyst with a Mn / Fe molar ratio of 1 showed the highest activity at the calcination temperature of 400 ° C. The results showed that over this catalyst, NO conversion reached 70 % under the condition of 280 ° C and a space velocity of 5000 h-1. SO2 and H2O had no adverse impact on the reaction activity when the SCO reaction temperature was above 240 ° C. In addition, the SCO activity was suppressed gradually in the presence of SO2 and H2O below 240 ° C, and such an effect was reversible after heating treatment.