Research on the preparation and denitrification performance of CeOx/ACN-Al2O3 new SCR catalyst

Abstract

Selective catalytic reduction technology is the most widely used method in flue gas denitrification. This article uses the kneading-ultrasonic equal volume impregnation method to prepare a modified activated carbon-alumina supported cerium oxide catalyst (CeO_x/ACN-Al₂O₃) for flue gas denitrification in coal-fired power plants. The relationship between the catalyst with different carrier and active component under different conditions and the conversion rate of nitrogen oxides is studied. XRD and other characterization methods are used to explore the intrinsic mechanism of the catalyst, and the main preparation parameters of the catalyst are optimized, including CeO_x loading amount, starch content, different concentrations of HNO₃, calcination temperature, calcination time, etc. The research results show that the catalyst with a calcination temperature of 400 °C, a starch content of 30 %, a CeO_x loading rate of 13 %, and a 40 % HNO₃ modified CeO_x/ACN-Al₂O₃ has the highest denitrification efficiency, reaching 96.18 % at the optimal operating temperature of 300 °C.