The Study On Performance Of Desulfurization And Denitration Simultaneously Over The Catalysts When The Reduction Was Used

S02and NOx are the important atmospheric pollutants, which can cause acid rain and photochemical smog and other environmental problems, this phenomenon is getting worse because of the energy consumption is increasing, SO2and NOx can discharge into the atmosphere with the FCC regenerator flue gas, Therefore, in order to protect the health of humans and animals and plants, the scientific workers must solve this growing environmental problem and lift the pollution of SO2and NOx effectivelyThe desulfurization and denitration technology is already very mature now, and the simultaneous desulfurization and denitrification has become a hot moment because of the problem of cost-effective. In this paper, series of catalysts preparated and removal of the SO2and NO of the flue gas. The catalysts characterized by characterization methods of TG-DSC, H2-TPR, BET, XRD, SEM-EDS XPS. The catalytic activity of catalysts for DeNOx and DeSO2was investigated in a fixed bed flow microreactor by using CO as the reducing gas.M/γ-Al2O3(M=Fe, Cu, Ni, Ce) catalysts are prepared in the first, in order to determine the appropriate active ingredient, the catalytic activity of catalysts for DeNOx was investigated. The best supporting amount and calcination temperature and calcination time were studied through the catalysts that load the best active ingredients. Experimental studies have shown that when using CO as a reducing agent, the best active component was Cu, and the catalysts had the best performance of desulfurization and denitration under the condition of the450℃and3h, the denitrification rate reached94.63%, the desulfurization rate reached93.34%. The simulated flue gas was composition of0.05%NO,0.10%of SO2,0.3%CO.Three kinds of two-component catalysts, Ni(x)Fe(y)/佰-AL2O3、 Fe(x)Cu(y)/γ-AL2O3、Ni(x)Cu(y)/γ-AL2O3were prepared and the catalytic activity were investigated with the simulated flue gas,the result show that Ni(6)Cu(4)/γ-AL2O3、Ni(8)Fe(2)/γ-AL2O3Fe(5)Cu(5)/γ-AL2O3have a good catalytic activity, and the Ni (8) Fe (2)/γ-A12O3have the best catalytic activity, the desulfurization rate reached96.55%at750℃, the denitration rate reached97.92%at700℃and unchanged until800℃. The desulfurization rate and the denitration rate almost unchanged at700℃after the120h. Ce as rare earth metals can be used as additives and added to the catalysts, the effect on the catalytic activity and the selective of the catalysts were investigated, the result show that when added3%Ce, the catalyst selectively were the best, but the desulfurization rate and the denitration rate is not significantly increased. The catalyst activity can be influenced by the Oxygen, the result shows that when the amount of the oxygen is1%the catalyst activity decreased significantlyFinally, according to the results that obtained in the early experiments, the simultaneous desulfurization and denitrification activity of the catalysts which have better denitration rate were studyed. The catalysts12%NiO/TiO2,12%CuO/TiO2,12%Fe2O3/TiO2,10%NiO-2%CuO/TiO2,2%NiO-10%Fe2O3/TiO2,4%Fe2O3-8%CuO/TiO2were prepared and the result show that the4%Fe2O3-8%CuO/TiO2catalyst had good desulfurization and denitrification activity. Desulfurization rate was95.3%, denitrification rate was95.7%.