Study On Removing NO_x By Plasma Assisted Low Temperature Catalyst

Nitrogen oxides is not only the culprit of the formation of such as acid rain and mist,but the emissions of nitrogen oxides also take place secondary reaction and produce second aerosol pollutants in the atmosphere,which is one of the reasons for the formation of haze.So to improve the removal efficiency of NO_x and reduce the energy consumption of the NO_x removal is currently one of the focuses of the study.Plasma has been widely used in waste gas.The removal of flue gas pollutants by plasma has good effect,no second pollution,simultaneously removing various pollutants and so on.This experiment remove NO_x by the plasma assisted low-temperature SCR catalyst,by changing the gas composition in simulated flue gas studying the effects on catalytic effect with adding different additives.In addition,The experiment has compared with the synergistic effect of PDC?Plasma-Driven Catalysis?and PEC?Plasma-Enhanced Catalysis?s in the same conditions,and the addition of C₂H₄ in the simulated flue gas has different effect.The MnO_x-CeO₂-V₂O₅/TiO₂ catalyst is prepared with low-temperature catalytic effect according to a certain proportion.It can effectively reduce the catalytic temperature of NO_x removal and improve the catalytic removal efficiency.Using PDC for a layout and studying on the effects of different atmosphere on concerted catalysis.Results show that the removal effect of NO_x by individual plasma is relatively poor and with high energy consumption.But Plasma synergistic catalysis can obviously enhance the removal efficiency of NO_x,and reduce the energy consumption of the plasma.To improve the removal efficiency of NO_x is low only with ammonia in the simulated flue gas,while adding ethylene has only increased the yield of NO₂ and has almost no effect on the removal of NO_x.But withing NH₃ and C₂H₄ at the same time in the simulated flue gas,the conversion rate of NO greatly increased at 100 in the case and almost completely transformed,and the removal efficiency of NO_x is greatly increased,and greatly reducing NO_x removal temperature.To compare the two catalytic form of PDC and PEC under the same conditions,it is found that plasma driven catalytic form has higher removal efficiency at the same temperature and energy consumption,and the effect is more obvious in the case of the accession of C₂H₄ and NH₃.