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The removal of SO2 from flue gas by pulsed corona discharge in presence of ammonia was experimentally investigated. The results showed that the SO2 removal mainly depends on thermal reaction of SO2 with NH3 and enhancements of 0%—25% by pulsed corona discharge in the range of the specific energy 0—5 Wh/Nm3. The aerosol mass concentration, mainly composed of ammonium sulfate, increased with specific energy dissipated into the reactor. With an initial concentration of 2000—2100 ppmv SO2 and energy consumption of 3 Wh/Nm3, when a stoichiometric amount of ammonia is injected, the removal efficiency of SO2 and percentage of ammonium sulfates in reaction products are all ≥80%. The collection efficiency of the reactor for aerosol is about 74% at a flue gas temperature of 60 to 65℃ and a water vapor content of 9% to 11% volume.
