Study On The Technology Of Plasma Co Catalyst For Denitrification

In recent years, with the development of economy, people’s living standard is improving constantly. However, people pursue economic growth blindly, even at the expense of the environment. PM2.5, metal pollutants, SOx, NOx and other kinds of VOC do harm to the atmosphere. Plasma technology has the advantages of high energy density, simple equipment, convenient arrangement and easy recovery.Many scholars pay attention to the method of using plasma to remove NOx, but it need to use too much energy, which seriously restrict industry applications. This research uses catalyst activity test platform and plasma synergistic catalyst denitrification platform to carry out experiments, the main contents are as follows:(1)The research configured the Cu and Fe catalyst according to the application condition of the catalyst, and tested the catalyst activity of desulfurization and denitrification, then mastered the variation regularity of catalyst performance with the reaction temperature and the amount of reactive species. The reaearch indicated that the desulfurization efficiency is the best when the CuO load was 10% in the Cu caatalyst, and the best efficiency of denitrification is 8%; When the load of Fe2O3 is 10%, the desulfurization efficiency and denitrification efficiency were the best in the Fe catalysts.Both catalyst have excellent performance, when SO2 participates in the reaction, the efficiency of denitration increasing, the window of denitrification temperature moves to low temperature and widen.(2)In depth study on the plasma denitrification, it was found that the efficiency was not affected by temperature, and the efficiency of denitrification increased first and then decreased with the increase of the discharge power. The effect of reactor arrangement, discharge power and reaction temperature on the efficiency of denitrification was studied when the plasma and catalyst were co-de-NOx. The experimental study found that when the temperature was below 120 degrees, the reactor with an external denitrification efficiency is higher, more than 120 degrees, the built-in reactor denitrification efficiency is higher, more than 300 degrees, two kinds of arrangement weren’t different. Compared with plasma and catalyst, the results show that the plasma and catalyst have obvious synergistic effect, but the effect is not a linear superposition, but a mutual promotion.(3)In order to achieve plasma cooperating catalyst denitrification technology in the flue gas, we added Ce in the catalyst, used NH3, CH4, CO as reducing gases, CuO /γ-Al2O3、CuO-CeO2/γ-Al2O3、Fe2O3/γ-Al2O3、Fe2O3-CeO2/γ-Al2O3 as catalyst, experimented under 160 degrees, the effect of reaction temperature and discharge power on the efficiency of plasma Co catalyst was studied under different conditions, and the reaction characteristics were analyzed.(4)In view of the plasma removal denitrification technology with high energy consumption problem, this paper put forward the idea of flue gas plasma treatment, first on the part of the flue gas discharge, then mixed with normal flue gas discharge treatment of high-energy gas, in order to achieve denitrification objective. Experimental study of the treatment of 5%,15%,25% volume fraction of flue gas, reaction temperature and discharge power on the efficiency of denitrification,improve the NOx removal efficiency at low temperature, and the energy consumption to achieve industrial requirements.