Experimental Research On Removal Of Nitrogen Oxide By Synergistic Dielectric Barrier Discharge With Cu Based Catalyst

Nitrogen oxide(NOx),as an important precursor of fine particles,will not only cause great harm to human health,but also cause iccid rain and photochemical smog.In this paper,NOx is removed by using low temperature catalyst assisted by plasma.The role of active radicals(O,O3 and N produced by discharue is explained.The required catalysts were prepared by impregnation metho,dCu and Fe bimetallic oxides were loaded on TiO2,Al2O3,ZSM-5,CNTs and AC in a certain proportion.BET,XRD,SEM,XPS,TGA,H2-TPR and NH3-TPD were used to determine the physical and chelical properties of the studied catalysts.(1)This paper first studied the removal of NO by Cu based mono-letallic catalysts.It was found that the catalyst Cu/ZSM-5 obtained the best catalytic performance at the energy density 184J/L,and achieved the highest NO removal rate of 76%.The catalvst Cu/ZSM-5 has the maximum specific surface area of 295.4m2/a,and the content of CuO on the supported catalytic reaction is up to 40%,and the dispersion of CuO is very uniform on the surface of the support.The reduction temperature of CuO on the catalvst Cu/ZSM-5 is low to 209℃ and the consumption of NH3 at the acid site is in the first place over the different catalysts,which provide the favorable conditions for the removal of NO in a simulated atmosphere.(2)Secondly,the removal of NO by Cu and Fe bimetallic catalysts is studied.It is found that the catalyst 1Z3C has the best catalytic performance at the enersy density 191.5J/L,and the highest removal rate 86.1%of NO is achieved,which is due to its excellent surface structure and redox properties.It was also found that about 80ppm of NO2 was involved in NO removal by fast SCR or catalytic oxidation processes.Furthermore,the resistance to sulfur of the catalvst 173C is tested.The reason for the decrease of the performance of the catalyst after the addition of SO2 was the formation of the surface metal ulfates and(NH4)2SO4.