Global model of low-temperature atmospheric-pressure He + H2O plasmas

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 captur...

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Main Authors:	Ding-Xin Liu, Peter Bruggeman, Felipe Iza, Ming-Zhe Rong, Michael G. Kong
Format:	Default Article
Published:	2010
Subjects:	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/6388
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id	rr-article-9545660
record_format	Figshare
spelling	rr-article-95456602010-01-01T00:00:00Z Global model of low-temperature atmospheric-pressure He + H2O plasmas Ding-Xin Liu (7205108) Peter Bruggeman (7205111) Felipe Iza (1258965) Ming-Zhe Rong (7205114) Michael G. Kong (7128488) Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified 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. 2010-01-01T00:00:00Z Text Journal contribution 2134/6388 https://figshare.com/articles/journal_contribution/Global_model_of_low-temperature_atmospheric-pressure_He_H2O_plasmas/9545660 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified Ding-Xin Liu Peter Bruggeman Felipe Iza Ming-Zhe Rong Michael G. Kong Global model of low-temperature atmospheric-pressure He + H2O plasmas
description	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.
format	Default Article
author	Ding-Xin Liu Peter Bruggeman Felipe Iza Ming-Zhe Rong Michael G. Kong
author_facet	Ding-Xin Liu Peter Bruggeman Felipe Iza Ming-Zhe Rong Michael G. Kong
author_sort	Ding-Xin Liu (7205108)
title	Global model of low-temperature atmospheric-pressure He + H2O plasmas
title_short	Global model of low-temperature atmospheric-pressure He + H2O plasmas
title_full	Global model of low-temperature atmospheric-pressure He + H2O plasmas
title_fullStr	Global model of low-temperature atmospheric-pressure He + H2O plasmas
title_full_unstemmed	Global model of low-temperature atmospheric-pressure He + H2O plasmas
title_sort	global model of low-temperature atmospheric-pressure he + h2o plasmas
publishDate	2010
url	https://hdl.handle.net/2134/6388
_version_	1797287273433137152

Global model of low-temperature atmospheric-pressure He + H2O plasmas

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