Plasmachemical and heterogeneous processes in ozonizers with oxygen activation by a dielectric barrier discharge

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 calcul...

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Bibliographic Details
Published in:Plasma physics reports 2016-10, Vol.42 (10), p.956-969
Main Authors: Mankelevich, Yu. A., Voronina, E. N., Poroykov, A. Yu, Rakhimov, T. V., Voloshin, D. G., Chukalovsky, A. A.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALUMINIUM OXIDES
Aluminum oxide
Atomic
Catalysis
CONCENTRATION RATIO
DENSITY FUNCTIONAL METHOD
Dielectric barrier discharge
DIELECTRIC MATERIALS
Dielectrics
ELECTRIC DISCHARGES
ENERGY ABSORPTION
ENERGY LOSSES
EXCITATION
INTERACTIONS
Ion and Plasma Sources
Mathematical analysis
Molecular
Optical and Plasma Physics
OXYGEN
OZONE
PASSIVATION
Physics
Physics and Astronomy
Plasma
PLASMA FILAMENT
Reaction kinetics
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Summary: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 Al 2 O 3 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 Al 2 O 3 surface by ozone and the subsequent interaction of O 3 molecules with the passivated surface is proposed. It is shown that the conversion reaction 2O 3 → 3O 2 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.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X16100056