Formation of Hydrogen Peroxide by Bipolar Pulsed Discharge Plasma in Water

The active species generated in the plasma reactor play a very important role in the process of water treatment by discharge plasma.Bipolar pulsed discharge in the gas-liquid-solid mixture was studied using a packed bed plasma reactor with gas bubbling in the experiment.Concentrations of H2O2 generated in the bipolar pulsed discharge system were measured,and the effect of different experiment conditions on H2O2 concentration was investigated.Experimental results proved that parameters such as the discharge time,applied voltage,gas flow rate and single pulse energy was positively correlated with the generation of H2O2.Characteristics of the solid packing had great influence on H2O2 concentration.Increase the density of summits on the solid surface increased the H2O2 formed.Compared with other four glass bead diameters between 5 mm and 9 mm,9 mm shows better performance.Besides,bipolar pulsed discharge in the packed bed reactor had a better performance on H2O2 generation than unipolar pulsed discharge.