Positive direct current corona discharges in single wire-duct electrostatic precipitators

Ashraf Yehia,Akira Mizuno,E Abdel-Fattah

doi:10.1063/1.4951693

Abstract

This paper is aimed to study the characteristics of the positive dc corona discharges in single wire-duct electrostatic precipitators. Therefore, the corona discharges were formed inside dry air fed single wire-duct reactor under positive dc voltage at the normal atmospheric conditions. The corona current-voltage characteristics curves have been measured in parallel with the ozone concentration generated inside the reactor under different discharge conditions. The corona current-voltage characteristics curves have agreed with a semi empirical equation derived from the previous studies. The experimental results of the ozone concentration generated inside the reactor were formulated in the form of an empirical equation included the different parameters that were studied experimentally. The obtained equations are valid to expect both the current-voltage characteristics curves and the corresponding ozone concentration that generates with the positive dc corona discharges inside single wire-duct electrostatic precipitators under any operating conditions in the same range of the present study.

Highlights

There are only two types of the electrical discharges that are being used in the literature to form non-thermal plasmas at the atmospheric pressure under different experimental techniques
The obtained equations are valid to expect both the current-voltage characteristics curves and the corresponding ozone concentration that generates with the positive dc corona discharges inside single wire-duct electrostatic precipitators under any operating conditions in the same range of the present study
The disadvantage of the corona discharges is that the volume of the non-thermal plasma that forms around the high electric field electrode depends to a large extent on mode and polarity of the applied voltage

Summary

Introduction

There are only two types of the electrical discharges that are being used in the literature to form non-thermal plasmas at the atmospheric pressure under different experimental techniques. The free radicals, in turn, lead to synthesis or creation of new chemical species.[5] The main advantage of the corona discharges is that they can be used to form non-thermal plasmas with flexibility in the operating parameters. These parameters include the geometrical shape of the discharge electrodes and their dimensions, type of the gas and its mass flow rate through the electrodes as well as mode and polarity of the voltage that drives the discharge process.[6] On the contrary, the disadvantage of the corona discharges is that the volume of the non-thermal plasma that forms around the high electric field electrode depends to a large extent on mode and polarity of the applied voltage. With the dc and ac corona discharges, the volume of the non-thermal plasma

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