Plasmachemical and heterogeneous processes in ozonizers with oxygen activation by a dielectric barrier discharge
- Authors: Mankelevich Y.A.1, Voronina E.N.1,2, Poroykov A.Y.1, Rakhimov T.V.1, Voloshin D.G.1, Chukalovsky A.A.1
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Affiliations:
- Skobeltsyn Institute of Nuclear Physics
- Faculty of Physics
- Issue: Vol 42, No 10 (2016)
- Pages: 956-969
- Section: Ion and Plasma Sources
- URL: https://journals.rcsi.science/1063-780X/article/view/185976
- DOI: https://doi.org/10.1134/S1063780X16100056
- ID: 185976
Cite item
Abstract
Plasmachemical and heterogeneous processes of generation and loss of ozone in the atmosphericpressure dielectric barrier discharge in oxygen are studied theoretically. Plasmachemical and electronic kinetics in the stage of development and decay of a single plasma filament (microdischarge) are calculated numerically with and without allowance for the effects of ozone vibrational excitation and high initial ozone concentration. The developed analytical approach is applied to determine the output ozone concentration taking into account ozone heterogeneous losses on the Al2O3 dielectric surface. Using the results of quantummechanical calculations by the method of density functional theory, a multistage catalytic mechanism of heterogeneous ozone loss based on the initial passivation of a pure Al2O3 surface by ozone and the subsequent interaction of O3 molecules with the passivated surface is proposed. It is shown that the conversion reaction 2O3 → 3O2 of a gas-phase ozone molecule with a physically adsorbed ozone molecule can result in the saturation of the maximum achievable ozone concentration at high specific energy depositions, the nonstationarity of the output ozone concentration, and its dependence on the prehistory of ozonizer operation.
About the authors
Yu. A. Mankelevich
Skobeltsyn Institute of Nuclear Physics
Author for correspondence.
Email: ymankelevich@mics.msu.su
Russian Federation, Moscow, 119991
E. N. Voronina
Skobeltsyn Institute of Nuclear Physics; Faculty of Physics
Email: ymankelevich@mics.msu.su
Russian Federation, Moscow, 119991; Moscow, 119991
A. Yu. Poroykov
Skobeltsyn Institute of Nuclear Physics
Email: ymankelevich@mics.msu.su
Russian Federation, Moscow, 119991
T. V. Rakhimov
Skobeltsyn Institute of Nuclear Physics
Email: ymankelevich@mics.msu.su
Russian Federation, Moscow, 119991
D. G. Voloshin
Skobeltsyn Institute of Nuclear Physics
Email: ymankelevich@mics.msu.su
Russian Federation, Moscow, 119991
A. A. Chukalovsky
Skobeltsyn Institute of Nuclear Physics
Email: ymankelevich@mics.msu.su
Russian Federation, Moscow, 119991