Experimental Study On Low Temperature SCO For Flue Gas Denitration

With the worsening air pollution, flue gas treatment has become a focus of global concern. The nitrogen oxides (NOx) discharged from the Coal-fired power plant become one of the main sources of air pollution. This study follows the following process:First, the selection of suitable metal oxides active ingredient and carrier, and preparation for low temperature oxidation catalyst; Second, crystal phase and surface area of the catalyst is embodied by XRD and BET; Third, investigation of the reaction conditions for different catalysts, and low-temperature oxidation resistance of catalyst to NO under different reaction conditions; Fourth, the activity of catalyst is been investigated while SO2, CO and water vapor exist in the flue gas. This study is in accordance with the actual situation of the flue gas of coal-fired power plants and steel mills. The results of the study show that Mn-Ce(0.3)/TiO2(550), contained in the catalyst Mn-Ce/TiO2by the production method of impregnation, has the highest activity; the denitration ratio reached76.2%at250℃and NO oxidation efficiency maintained at about41%under a reaction temperature of150℃. The catalyst activity decreased largely while the volume of water vapor accounts for12%of1000ppmSO2. The nitrogen oxides conversion rate of Fe modified Mn-Fe (x)-Ce (0.3)/TiO2significantly increased, reached to86.0%at250℃.