Bulletin of the American Physical Society
75th Annual Gaseous Electronics Conference
Volume 67, Number 9
Monday–Friday, October 3–7, 2022;
Sendai International Center, Sendai, Japan
The session times in this program are intended for Japan Standard Time zone in Tokyo, Japan (GMT+9)
Session GM2: Workshop IV: Catalytic Effects in Plasma-Liquid Interaction
1:30 PM–5:00 PM,
Monday, October 3, 2022
Sendai International Center
Room: Shirakashi 2
Chair: Hiromasa Tanaka, Nagoya University
Abstract: GM2.00005 : Modeling of plasma-liquid interactions
4:15 PM–5:00 PM
Presenter:
Annemie Bogaerts
(University of Antwerp)
Authors:
Annemie Bogaerts
(University of Antwerp)
Pepijn Heirman
(University of Antwerp)
For this reason, we developed a combination of a 0D chemical kinetics model and a 2D fluid dynamics model for a plasma jet interacting with liquid water. We this model we can study the gas and liquid flow behavior, and the transport and chemical reactions of reactive oxygen and nitrogen species (RONS) both in gas and liquid phase. We calculate the species concentrations, both during and after plasma treatment, to elucidate the chemical pathways and the lifetime of the various RONS in solution.
In this talk I will show the gas and liquid flow profiles, and species concentration profiles, both in the gas and liquid phase. The latter are highly dictated by the Henry’s constants of the species. I will also illustrate how the species concentrations in the liquid vary as function of time, during and after plasma treatment, and explain this behavior based on the liquid phase chemistry and the Henry’s constants. After plasma treatment, the concentrations of most short-lived RONS drop within 10 seconds. The O3 concentration drops linearly, and it takes ca. 50 seconds to disappear, explained by the low Henry’s constant, causing a continuous flow of O3 back to the gas phase after plasma treatment. Only H2O2, HNO2 and HNO3 are stable in the liquid after plasma treatment, also confirmed by experiments.
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