Influence of Oxygen Impurity on Nitrogen Atmospheric-Pressure Plasma Jet
Journal
Applied Sciences (Switzerland)
Journal Volume
13
Journal Issue
7
Date Issued
2023-04-01
Author(s)
Tsai, Jia Shiuan
Abstract
This study discussed the effect of oxygen impurity in the inlet gas of a nitrogen atmospheric pressure plasma jet (APPJ). A numerical model that takes into account the fluid dynamics, heat transfer, mass transfer, diffusion, and chemical reactions was developed to simulate the nitrogen APPJ. Further, a DC nitrogen APPJ experiment was performed to verify the plasma temperature characteristics on the treated surface. The plasma temperature decreased with an increase in the oxygen impurity. Moreover, the oxygen impurity influenced the related excited and neutral species. Specifically, with added oxygen impurity, N-related species decreased whereas O- and NOx-related species increased. Because the excited state species constitutes the most important reactant in APPJ treatment, this study could serve as a reference for the adjustment of a nitrogen APPJ.
Subjects
atmospheric pressure plasma | atmospheric pressure plasma jet (APPJ) | impurity | nitrogen plasma | simulation
Publisher
MDPI
Type
journal article