| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Analysis of Dissociation Mechanism of CO$_{2}$ in a Micro-Hollow Cathode Discharge |
| Jiang-Ling Cheng, Hai-Xing Wang**, Su-Rong Sun |
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191
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| Cite this article: |
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Jiang-Ling Cheng, Hai-Xing Wang, Su-Rong Sun 2016 Chin. Phys. Lett. 33 108201 |
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Abstract Considering the feature of distributions of parameters within the micro-hollow cathode discharge, we use a simple method to separate the sheath region characterized by drastic changes of plasma parameters and the bulk plasma region characterized by smooth changes of plasma parameters. A zero-dimensional chemical kinetic model is used to analyze the dissociation mechanism of CO$_{2}$ in the bulk plasma region of a micro-hollow cathode discharge and is validated by comparisons with previous modeling and experimental results. The analysis of the chemical kinetic processes has shown that the electron impact dissociation and heavy species impact dissociation are dominant in different stages of the micro-hollow cathode discharge process for a given applied voltage. The analysis of energy consumption distributions under different applied voltages reveals that the main reason of the conversion improvement with the increase of the applied voltage is that more input energy is distributed to the heavy species impact dissociation.
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Received: 11 June 2016
Published: 27 October 2016
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| PACS: |
82.33.Xj
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(Plasma reactions (including flowing afterglow and electric discharges))
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52.80.Mg
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(Arcs; sparks; lightning; atmospheric electricity)
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52.27.-h
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(Basic studies of specific kinds of plasmas)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11575019 and 11275021. |
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