A study of SO2 removal by positive pin-plate discharge system

Increasing fossil fuel burning has prompted serious concerns over acidifying compound emissions and air pollution has become a serious problem. Scientists and engineers have made numerous attempts to develop methods to control acid compound emissions. Non-thermal plasma, which is induced primarily by electric discharges, has been widely studied in the area of hazardous gas control. In this paper, the positive corona-induced removal of SO₂ from the flue gas is studied based on the application of DC high voltage to a pin-plate electrode structure. The effect of discharge gap, discharge time and gas ingredient on SO₂ removal rate was studied under positive pin-plate discharge condition. The results show that the removal rate of SO₂ was decreased with the increasing discharge gap under the define DC high voltage.