Title
Numerical analysis of the NO and O generation mechanism in a needle-type plasma jet Numerical analysis of the NO and O generation mechanism in a needle-type plasma jet
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Bristol ,
Subject
Physics
Chemistry
Source (journal)
New journal of physics / Institute of Physics; German Physical Society. - Bristol
Volume/pages
16(2014) , 25 p.
ISSN
1367-2630
1367-2630
Article Reference
063054
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In this paper we study two cold atmospheric pressure plasma jets, operating in Ar + 2% air, with a different electrode geometry but with the same power dissipated in the plasma. The density profiles of the biomedically active NO and O species throughout the plasma jet, previously obtained by laser diagnostics, are calculated by means of a zero-dimensional semi-empirical reaction kinetics model. A good agreement between the calculated and measured data is demonstrated. Furthermore, the most probable spatial power distribution in an RF driven plasma jet is obtained for the first time by comparing measured and calculated species density profiles. This was possible due to the strong effect of the power distribution on the NO and O density profiles. In addition the dominant reaction pathways for both the NO and the O species are identified. The model allows us to obtain key information on the reactive species production inside the jet, which is difficult to access by laser diagnostics in a coaxial geometry. Finally, we demonstrate that water impurities in the order of 100 ppm in the gas feed can have a significant effect on the spatial distribution of the NO and O density.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/f74ee2/32f0cdc0.pdf
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