Simultaneous Desulfurization And Denitrification Over Fe And Mn Dopted With Rare Earth Catalyst

Coal is the main source of energy in China, in the process of coal combustion, SO2and NOx emissions cause serious air pollution, such as acid rain, photochemical smog, greenhouse effect and so on. The metal oxide processes is a promising technology for simultaneous desulfurization and denitrification, which generates no wastes, reduces energy consumption, and the by-products decreasing the costs.In the paper, we prepared a series of catalyst by the impregnation method, CO was used as reducing agent.The results indicated that:(1) The efficiency of simultaneous desulfurization and denitrification by Fe-Ce/Kaolin and Mn-Ce/Kaolin catalysts was higher than the efficiency of Fe-Mn-Ce/Kaolin catalysts, the efficiency of Fe/Kaolin and Mn/Kaolin catalysts was the lowest. The order of the catalysts efficiency from low to high was Mn/Kaolin<Fe/Kaolin<La/Kaolin=Ce/Kaolin. The optimal reaction temperature of kaolin catalysts is600℃.(2) Catalysts used Kaolin as carrier showed better simultaneous desulfurization and denitrification activity than which used molecular sieve and clay as carrier, the desulfurization and denitrification efficiency were higher than99%under600℃(3) The efficiency of simultaneous desulfurization and denitrification of Rare earth load kaolin catalysts maintained at above98%for at least400h.(4) The characterization results showed that the catalysts prepared in my experiment belonged to mesoporous material, Ce as the K-CelOcatalyst active component was in a slight decrease after the400h reaction, Fe/Kaolin and Mn/Kaolin catalysts all have strong and weak acid sites of bits.