Mechanism of SiO2 Modulation on the Denitrification and Sulfur Resistance of MnCe/Ti Catalyst
The deep peaking of coal-fired power plants puts higher requirements on the wide-temperature denitrification and sulfur resistance of SCR catalysts,while the existing V-W/Ti cat-alyst generally have poor low-temperature denitrification and sulfur resistance.In this paper,the modulation mechanism of SiO2 on the wide-temperature denitrification and sulfur resistance of the MnCe/Ti catalyst was investigated by targeting the MnCe/Ti catalyst.The study revealed that SiO2 improved the high-temperature denitrification activity of the MnCe/Ti catalyst,and the NO conversion could be stably controlled above 90％in the temperature zone of 250～350℃.SiO2 en-hanced the denitrification and sulfur resistance of the MnCe/Ti catalyst by promoting the generation of low-temperature NH4,improving the reactivity of adsorbed NO,and inhibiting the adsorption of SO2 and the generation of bulk-like sulfate.
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