Influence of Ionization Degrees on Conversion of CO and CO 2 in Atmospheric Plasma near the Ground

PANG Xuexia(庞学霞); DENG Zechao(邓泽超); JIA Pengying(贾鹏英); LIANG Weihua(梁伟华)

doi:10.1088/1009-0630/16/8/09

Plasma Science and Technology > 2014 > 16(8): 782-788. > DOI: 10.1088/1009-0630/16/8/09

PANG Xuexia(庞学霞), DENG Zechao(邓泽超), JIA Pengying(贾鹏英), LIANG Weihua(梁伟华). Influence of Ionization Degrees on Conversion of CO and CO 2 in Atmospheric Plasma near the Ground[J]. Plasma Science and Technology, 2014, 16(8): 782-788. DOI: 10.1088/1009-0630/16/8/09

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Influence of Ionization Degrees on Conversion of CO and CO 2 in Atmospheric Plasma near the Ground

College of Physics Science and Technology, Hebei University, Hebei Key Lab of Optic-electronic Information and Materials, Baoding 071002, China

Funds: supported by the Research Foundation of Education Bureau of Hebei Province, China (No. Q2012084), National Natural Science Foundation of China (No. 10805013) and Natural Science Foundation of Hebei Province, China (No. A2011201132)

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Received Date: July 24, 2013

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Abstract

Abstract

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, CO ₂ and other main reactants (namely OH and O₂ ), which affect the conversion of CO and CO ₂, are obtained for afterglow plasma with different initial values. The results show that the consumption rate of CO is largest when the initial electron number density n_e0 =10¹² cm ⁻³, i.e. the ionization degree is 0.000004%. The number density of CO ₂ is relatively small when n _e0 =10 ¹⁶ 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 CO 2 and the consumption rate of CO comprehensively, the best condition is n _e0 =10 ¹³ cm ⁻³, i.e. the ionization degree is 0.00004% for reducing the densities of CO and CO 2 in the atmospheric plasma. The temporal evolutions of N ⁺, Ar ⁺, CO ⁺ and CO ⁺₂ are also shown, and the influences on the temporal evolutions of CO and CO ₂are analyzed with increasing ionization degree.
- ionization degree,
- carbon dioxide,
- carbon monoxide,
- atmospheric plasma

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References (21)

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