Electron beam purification of flue gas with high concentration of sulfur dioxide

In order to apply the electron beam purification method to the flue gas containing high concentrations of SO2, a basic study was done with a simulated flue gas containing 4800 ppm of SO2. Removal efficiencies of SO2 and NOx were satisfactorily achieved to reach 97 and 88%, respectively, at 70 deg C with the dose of 10.3 kGy without any NH3 leakage. The higher concentrations of SO2, H2O, and added NH3 were found to be effective to oxidize NO to form NO2 and to oxidize SO2 to form SO3 in the process. The results obtained by the study clearly show that the electron beam processing will have high potential for the treatment of the flue gas containing a high concentration of SO2 such as that of the Bulgarian plant being constructed now. (author)