Ozone production in an oxygen-fed wire to cylinder ozonizer

Abstract

In this paper we present a numerical simulation for the calculation of ozone production in an oxygen-fed wire to cylinder ozonizer. We investigate the pressure, temperature, average flow velocity and multi-injection dependence. The results show that an oxygen-fed ozonizer can be modelled by a plug flow reactor: the thermal degradation of ozone along the z axis of the cylinder can also be observed.

Removal of Toluene, Chlorobenzene, and Benzene by a Needle‐to‐Net Corona Discharge Reactor

“…For instance, the concentration of the charged species should be relatively high in the area near zone 1, and should decrease with the distance from zone 1 because of the negatively charged species transfer from the narrow corona spot at the cathode tip toward the relatively large net anode keeping the total charges. In addition, the concentration of the short-lived radicals produced in zone 1 by dissociation of the gas molecules also should be high in the area near zone 1 [9,10]. As a result, the reactivity in zone 2 becomes higher near the cathode than near the anode.…”

High-temperature simultaneous removal of acetaldehyde and ammonia gases using corona discharge

“…2(a). As temperature increases, the CH 3 CHO removal efficiency remains nearly 100% from room temperature to 200 8C because of the effect of O 3 and O K anion at low temperatures [13,17,18]. In contrast, the CH 3 CHO removal efficiency tends to significantly decrease above 200 8C because of less O 3 generated from O 2 and reduction of the mean residence time of the gas mixture inside the reactor at high temperature.…”

“…Since NO x formation can be attributed to the reaction of discharge-induced N radicals with O 2 [15,16], N radicals should also contribute to the removal of CH 3 CHO and/or NH 3 from both N 2 and air at high temperatures. In addition, in the removal from air, there should be the extra effect of O radicals produced by electron impact to O 2 and by O 3 decomposition [13,17,18]. Therefore, the removal efficiency from air at high temperatures should be enhanced by O radicals, though O 3 oxidation is not effective.…”

Numerical simulation of an oxygen-fed wire-to-cylinder negative corona discharge in the glow regime

“…Therefore, different simplifications are usually introduced in order to reduce the complexity of the problem. For example, wire-cylinder streamer corona discharge has been simulated by Hadj-Ziane et al [1,2] and Loiseau et al [3] assuming that electronic injections, with azimuthal symmetry, occurred at certain sites along the corona wire. The injected electron density was given as an empirical law, and the dependence of reaction rate constants with the electric field was not taken into account.…”

“…Thus, the corona reactor will operate as an ozonizer, where pure oxygen enters the cylinder and ozone and other by-products are collected at the exit. Contrary to other studies [1][2][3][4][5][6], the governing equations will be simultaneously solved for all species, thus providing a revealing picture of the interplay between electrons, neutral species and the different types of ions. The effects of ozone decomposition on the electrode surface and Joule heating due to the electrical current will also be included in the numerical model.…”