Session PR1: Plasma Chemistry
2:00 PM–3:30 PM, Thursday, November 17, 2011
Room: 255D
Chair: Jan Benedikt, Ruhr University Bochum
Abstract ID: BAPS.2011.GEC.PR1.2
Abstract: PR1.00002 : Chemical kinetics of radio-frequency driven atmospheric-pressure helium-oxygen plasmas in humid air
2:30 PM–2:45 PM
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Abstract 
Authors:
Tomoyuki Murakami
(Tokyo Institute of Technology)
Kari Niemi
(Queens University Belfast)
Timo Gans
(University of York)
Deborah O'Connell
(University of York)
William Graham
(Queens University Belfast)
We describe the chemical kinetics of radio-frequency (rf) driven atmospheric-pressure helium-based plasmas in ambient air as determined through a zero-dimensional time-dependent global model. The effects of humid-air admixtures on the plasma-induced chemical reactions and the evolution of species concentrations in the helium-oxygen mixture (He-O2, helium with 5000 ppm admixture of oxygen) are studied for wide air impurity levels of 1-5000 ppm with the relative humidity of 0-100\%. Comparisons made with experiments using an rf driven micro-scale atmospheric pressure plasma jet and one-dimensional simulations suggest that the plausible air impurity level in the experiments is not more than hundreds ppm. Effects of the air impurity containing water-humidity on electro-negativity and chemical activity are clarified with particular emphasis on reactive oxygen species.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.GEC.PR1.2