Influence of Ionization Degrees on Conversion of CO and CO2 in Atmospheric Plasma near the Ground
A zero-dimensional model is used to study the processes of physical and chemical reactions in atmospheric plasma with different ionization degrees near the ground (0 km). The temporal evolutions of CO, C02 and other main reactants (namely OH and O2), which affect the conversion of CO and C02, are ob...
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Published in | 等离子体科学与技术:英文版 no. 8; pp. 782 - 788 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
01.08.2014
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Subjects | |
Online Access | Get full text |
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Summary: | A zero-dimensional model is used to study the processes of physical and chemical reactions in atmospheric plasma with different ionization degrees near the ground (0 km). The temporal evolutions of CO, C02 and other main reactants (namely OH and O2), which affect the conversion of CO and C02, are obtained for afterglow plasma with different initial values. The results show that the consumption rate of CO is largest when the initiM electron number density neo=1012 cm-3, i.e. the ionization degree is 0.000004%. The number density of CO2 is relatively small when neo=1016 cm-3, i.e. the ionization degree is 0.04%, whereas they are very close under the condition of other ionization degrees. Considering the total number densities of CO and C02 and the consumption rate of CO comprehensively, the best condition is neo=1013 cm-3, i.e. the ionization degree is 0.00004% for reducing the densities of CO and CO2 in the atmospheric plasma. The temporal evolutions of N+, Ar+, CO+ and CO+ are also shown, and the influences on the temporal evolutions of CO and C02 are analyzed with increasing ionization degree. |
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Bibliography: | ionization degree, carbon dioxide, carbon monoxide, atmospheric plasma PANG Xuexia , DENG Zechao , JIA Pengying, LIANG Weihua (College of Physics Science and Technology, Hebei University, Hebei Key Lab of Optic-electronic Information and Materials, Baoding 071002, China) A zero-dimensional model is used to study the processes of physical and chemical reactions in atmospheric plasma with different ionization degrees near the ground (0 km). The temporal evolutions of CO, C02 and other main reactants (namely OH and O2), which affect the conversion of CO and C02, are obtained for afterglow plasma with different initial values. The results show that the consumption rate of CO is largest when the initiM electron number density neo=1012 cm-3, i.e. the ionization degree is 0.000004%. The number density of CO2 is relatively small when neo=1016 cm-3, i.e. the ionization degree is 0.04%, whereas they are very close under the condition of other ionization degrees. Considering the total number densities of CO and C02 and the consumption rate of CO comprehensively, the best condition is neo=1013 cm-3, i.e. the ionization degree is 0.00004% for reducing the densities of CO and CO2 in the atmospheric plasma. The temporal evolutions of N+, Ar+, CO+ and CO+ are also shown, and the influences on the temporal evolutions of CO and C02 are analyzed with increasing ionization degree. 34-1187/TL |
ISSN: | 1009-0630 |
DOI: | 10.1088/1009-0630/16/8/09 |