Research On The Complex Catalytic Oxidation Process Of Simultaneous Desulfurization And Denitration

China is the world’s largest coal-fired power country. The emissions of SO2, NOX, dust and other pollutants which cause environmental problems will severely restrict the social and economic developments. In this paper, the process of simultaneous removal of SO2and NOX in M adsorption liquid, through complex catalytic oxidation catalyzed by active carbon, was researched by using A as the reducing agent. The NO removal rate of90%and SO2removal rate of100%were obtained. Experimental results showed that NO removal rate reached the maximum at0.04mol/L concentration of A. The coconut husk activated carbon showed the best absorptivity than that of shell activated carbon and of coal broken activated carbon. The NO removal rate increased with increasing concentration of M, but0.02mol/L was appropriate concentration in consideration of economic. The removal of NO was the most effective under conditions as follows:the regeneration temperature at65℃, the absorption liquid temperature at50℃and pH value of6.75. Increasing oxygen content and gas flow were not conducive to the absorption of NO. It was not conducive to the absorption of NO by increasing A concentration in the early reaction, but it was adverse in the latter reaction. Electrolysis could be used to regenerate partially inactivation solution to improve NO removal rate, but the effect was worse than the reduction method. The SO2was favorable to NO removal when NO and SO2in the flue gas was quite content. Wet complex denitration technology combined with magnesium desulfurization process worked well. Continuous fill reducing agents or high concentrations of absorbing solution enabled to make the denitration rate stable at a high level for a long time.The results of non-catalytic oxidation of A in low concentrations showed that the optimal reaction conditions were at50℃and pH=5.55. It was found that the reaction rate was proportional to the concentration of A and of oxygen, and inversely proportional to the concentration of ammonium sulfate. According to the results, the non-catalytic oxidation of A kinetic equation was deduced.