Calculation of Ozone Generation in AC Corona Discharge Reactor

Abstract

The aim of this work is to study the analytical calculation of ozone generation in an ac corona discharge reactor. The corona discharges were generated in a dry air-fed wire-duct reactor stressed by an ac voltage at atmospheric pressure and room temperature. The current–voltage characteristics of the ac corona discharges relative to ozone generation in the reactor were measured under different discharge conditions. Subsequently, an empirical equation was derived for the calculation of the ozone concentration generated in the reactor on the bases of the experimental results. The derived equation can be used to predict the ozone concentration generated by ac corona discharges in the reactor for any values of the parameters that were investigated in the experiment.

Assessment of ozone generation in dry air fed silent discharge reactors

“…Subsequently, most of the ozone molecules generated inside the reactor are immediately swept by the flowing air molecules outside the reactor without destruction. 9,11 This explains why the ozone destruction coefficient K d of Eq. (13) decreases with the increase of the air flow rate Q through the reactor.…”

“…On the other hand, there are several mechanisms for destruction of the ozone generated by either corona or silent discharges in dry air-fed reactors. [6][7][8][9] Subsequently, the theoretical expectation of the ozone generation inside the investigated reactors should be extended to take the ozone destruction processes into account.…”

“…1,3, 4 The net ozone yield depends on many factors such as the physical parameters of the silent discharge rector, type and rate of the gas flowing through the reactor as well as the electric power dissipated inside the reactor. [6][7][8][9][10][11][12] In order to design ozone generators feeding by dry air in the various industrial applications, it is necessary to have a suitable criterion to control the desired concentration of the generated ozone. Therefore, the ozone concentration generated by silent discharges in dry air fed coaxial cylindrical reactors has been measured, in this paper, under conditions like those of the real ozone generators.…”

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

“…The air flowing from outlet of the reactor has been passed through a quartz cell installed in UV-VIS spectrophotometer (SHIMADZU-1200), where the absorbance of the ozone was recorded at a wavelength of 253.7 nm. [22][23][24][25] The ozone concentration [O3] in the flowing air was calculated from the absorbance measurements by using Beer-Lambert law. 6 The average room temperature during the experimental measurements was about 288 K. Every point of the experimental results represents the mean of three independent readings under the same operating conditions.…”

“…Subsequently, two of the authors of this paper have studied previously the ozone generation with the corona discharges under different operating conditions. [22][23][24][25] From another point of view, single wire-duct arrangement is being used over a wide range as discharge electrodes in the electrostatic precipitators. [26][27][28][29] Therefore, the corona discharges were studied in this paper inside dry air fed single wire-duct reactor under positive dc voltage.…”