Characteristics of the dielectric barrier corona discharges

Abstract

In this paper, the electrical characteristics of both the dielectric barrier corona discharge and the usual ac corona discharge have been studied in parallel with the ozone generation under the same operating conditions. Therefore, the corona discharges were formed inside two identical reactors in the form of a coaxial wire-to-cylinder with and without a dielectric barrier covering the inner surface of the cylinder. The two reactors have been fed by constant flow rates from the dry air and the oxygen gas independently at the atmospheric pressure and the room temperature, in parallel with applying a sinusoidal ac voltage to the electrodes of the reactors. The electric power consumed in forming the corona discharges and the waveform of the discharge current as well as the ozone concentration generated in the flowing gases through the reactors have been studied versus the peak of the ac voltage that was applied to the reactors. The current-voltage oscillograms showed that the sequence of the dielectric barrier corona discharge modes in both the dry air and the oxygen gas is the same as the sequence of the usual ac corona discharge modes in the same gases. With the increase of the peak value of the ac voltage applied to the dielectric barrier corona discharge reactor, the peak of the discharge current increases linearly while the value of the electric charge accumulated on the surface of the dielectric barrier increases in the form of a power function. The ozone concentration generated by the dielectric barrier corona discharges is approximately equal to the ozone concentration generated by the usual ac corona discharges in both the dry air and the oxygen gas under the same operating conditions.

Plasma-assisted fluidized-bed atomic layer deposition of Pd-Cu nanoparticles on porous powder for CO2 hydrogenation

“…Generally, DBD plasma consists of numerous randomly distributed and highly luminous filaments (micro-discharge). With increasing the input power, the number of filaments and discharge intensity increase, and this relationship has been confirmed by experimental observation and simulation study [81][82][83]. As a consequence, the higher discharge power has the better CO 2 hydrogenation [84].…”

Partial Discharge Evolution under Half-sine Voltage Excitation

“…The corona discharge is one of the most typical discharge types, which happens in partial position in gas with enough electric field. Surface charge accumulation will take effect while insulation material falls in between of the electrodes, DBCD can happen along with different PD phenomena [1]- [2].…”

Non-thermal Plasma Treatment of ESKAPE Pathogens: A Review

“…The advantage of this arrangement is the larger exposed area; the disadvantage is the small distance of several millimeters between the electrodes. Detailed description and a comparison of DBD with corona discharges have been published ( Yehia, 2019 ). The start-up company Plasmapp (Daejeon, South Korea) launched STERPACK, which is based on DBD and declared as an effective method of biofilm removal from plastics and foods ( Lee, 2018 ).…”