Effect of Temperature and SO2 on Mercury Removal Performance on a Ce-Cu/Al Catalyst in Low-Temperature Flue Gas

Abstract

The effects of flue gas temperature and SO2 content on the catalytic oxidation of 2Ce-4Cu/Al catalysts for cooperative control of Hg0 and NO were investigated. The results show that the optimum activation temperature is 200°C. And when the concentration of SO2 in the gas reaches 600ppm, the comprehensive conversion efficiency of Hg0 and NO is optimal, the conversion efficiency remains above 70%. The results of the catalyst analysis before and after the reaction show that both lattice oxygen and chemisorption oxygen are involved in the reaction. Cu and Ce have a cooperative reaction on the catalyst surface. The interconversion between Ce and Cu ions of different values contributes to the formation of surface lattice oxygen, which promotes the Hg0 catalytic oxidation reaction and NH3-SCR reaction.