Properties of water surface discharge at different pulse repetition rates

Abstract

The properties of water surface discharge plasma for variety of pulse repetition rates are investigated. A magnetic pulse compression (MPC) pulsed power modulator able to deliver pulse repetition rates up to 1000 Hz, with 0.5 J per pulse energy output at 25 kV, was used as the pulsed power source. Positive pulse with a point-to-plane electrode configuration was used for the experiments. The concentration and production yield of hydrogen peroxide (H2O2) were quantitatively measured and orange II organic dye was treated, to evaluate the chemical properties of the discharge reactor. Experimental results show that the physical and chemical properties of water surface discharge are not influenced by pulse repetition rate, very different from those observed for under water discharge. The production yield of H2O2 and degradation rate per pulse of the dye did not significantly vary at different pulse repetition rates under a constant discharge mode on water surface. In addition, the solution temperature, pH, and conductivity for both water surface and underwater discharge reactors were measured to compare their plasma properties for different pulse repetition rates. The results confirm that surface discharge can be employed at high pulse repetition rates as a reliable and advantageous method for industrial and environmental decontamination applications.

Self-organized patterns by a DC pin liquid anode discharge in ambient air: Effect of liquid types on formation

“…• Enclosed DBD [13][14][15][16] • APPJ impinging on ITO in open air 17 • Pin liquid electrode discharge in open air 18,19…”

Characterization of dielectric barrier discharges with water in correlation to productions of OH and H2O2 in gas and liquid phases

“…In recent years, atmospheric-pressure glow-discharge plasmas with water vapor or gas-water interface 1,2) have been of much interest for various applications, such as biomedical, agricultural, and environmental technologies. 3) A variety of plasma generation methods 1,2,4,5) have been employed using, e.g., dielectric barrier discharges (DBDs) in planar or coaxial structure with water vapor, [6][7][8][9][10][11] DBDs with liquid water film or water electrode, [12][13][14][15][16][17] pulsed discharges in pin-to-plane structure with water vapor [18][19][20][21][22][23][24] or pin-to-water structure, [25][26][27][28][29][30][31][32] plasma jets directed to or injected into water surface, [33][34][35][36][37][38][39][40][41][42][43][44]…”

A Review of Pulsed Power Systems for Degrading Water Pollutants Ranging From Microorganisms to Organic Compounds

“…A point-to-plane electrode configuration was used in [36], [38] to treat orange II and indigo carmine organic dyes with WSD. A high voltage needle electrode was placed in air and a plate ground was immersed in water [36] as shown in Fig.…”