Simultaneous Removal of SO2/NOx by Corona Disharge Plasma

An improved wire-to-plate type plasma reactor was devised to reduce NO_x/SO₂ in simulated flue gas. Nozzle type electrodes were installed in the front of wire electrodes for injecting and activating deNO_x/deSO₂ additives. Experimental results indicate that nozzle type electrodes could effectively activate propene (C₃H₆) and ammonia (NH₃) to produce active radicals, therefore advance NO_x/SO₂ removal. Compared with the NO_x removal rate when propene was not activated by nozzle electrode, propene activated by corona plasma could further increase NO_x removal rate over 10%, while plasma-activated propene played little role in SO₂ removal; unlike propene, plasma-activated ammonia played a positive role in both SO₂ and NO_x removal.