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Title: Global model of low-temperature atmospheric-pressure He + H2O plasmas
Authors: Liu, D.X.
Bruggeman, Peter
Iza, Felipe
Rong, M.Z.
Kong, Michael G.
Issue Date: 2010
Publisher: © Institute of Physics Publishing
Citation: LIU, D.X....et al., 2010. Global model of low-temperature atmospheric-pressure He + H2O plasmas. Plasma Sources Science Technology, 19(025018), 22pp.
Abstract: A detailed global model of atmospheric-pressure He + H2O plasmas is presented in this paper. The model incorporates 46 species and 577 reactions. Based on simulation results obtained with this comprehensive model, the main species and reactions are identified, and simplified models capable of capturing the main physicochemical processes in He + H2O discharges are suggested. The accuracy of the simplified models is quantified and assessed for changes in water concentration, input power and electrode configuration. Simplified models can reduce the number of reactions by a factor of ∼10 while providing results that are within a factor of two of the detailed model. The simulation results indicate that Penning processes are the main ionization mechanism in this kind of discharge (1–3000 ppm of water), and water clusters of growing size are found to be the dominant charged species when the water concentration is above ∼100 ppm. Simulation results also predict a growing electronegative character of the discharge with increasing water concentration. The use of He + H2O discharges for the generation of reactive oxygen species of interest in biomedical applications and the green production of hydrogen peroxide are also discussed. Although it would be unrealistic to draw conclusions regarding the efficacy of these processes from a zero-dimensional global model, the results indicate the potential suitability of He + H2O plasmas for these two applications.
Description: This article is Restricted Access. It was published in the journal, Plasma Sources Science and Technology [© Institute of Physics]. The definitive version is available at: http://iopscience.iop.org/0963-0252/19/2/025018/
Version: Closed access
DOI: 10.1088/0963-0252/19/2/025018
URI: https://dspace.lboro.ac.uk/2134/6388
ISSN: 0963-0252
Appears in Collections:Closed Access (Electronic, Electrical and Systems Engineering)

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