The Theoretics And Experimental Study On Simultaneous Desulfurization And Denitrification Of Fenton Reagent

SO2and NOx are the main pollutants of coal-fired power plant emissions,excess emissions will increase a series of current environmental problems, forexample, acid rain and photochemical smog. In order to reduce the emissions ofSO2, coal-fired power plant often use wet flue gas desulfurization (WFGD),which is mature, reliable high desulfurization efficiency and has been widelyapplied. The selective catalytic reduction (SCR) and non-selective catalyticreduction (SNCR) is mainly used for controlling the emission of NOx. Theformer exists a series of shortcomings, for example, covers a large area, has acomplex systems, the initial investment is high and the catalyst is easypoisoning; the denitration efficiency of latter is low. Therefore, how to combinedesulfurization with denitration device, more attention has been paid to thedevelopment of a new, efficient, environment friendly desulfurization anddenitration technology.Based on the researches in the field of pollutants on Advanced OxidationTechnology (AOPs), this paper proposes a method of Fenton reagent (Fe2+/H2O2) for simultaneous removal of SO2and NO. First of all, the kineticsfor oxygen absorption of NO by Fenton reagent was studied, the reaction orderof NO concentration and H2O2concentration, activation energy,pre-exponential factor and other related parameters are calculated, and themathematical model for oxygen absorption of NO by Fenton reagent wasestablished. Secondly, the experiments of simultaneous removal of SO2and NOby Fenton reagent are conducted, the effects of H2O2concentration, NOconcentration, reaction temperature, the volume fraction of O2and other factorson the NO and SO2removal efficiency are studied, the reaction products wereanalyzed by ion chromatography, the reaction mechanism and reaction pathwas drawed. Finally, based on response surface method, the prediction modelwas established to investigate the effect of various factors interaction on theNO removal efficiency.Based on the Fenton reagent, many types of Fenton’s reagent were formed,the experiments of removal NO by nano Fe3O4/H2O2reagent are conducted, theeffects of H2O2concentration, NO concentration, reaction temperature, themass fraction of O2and other factors on the NO absorption rate are studied,analyses the reaction mechanism of the technology briefly.