Liu, Zehui, Huang, Bangdou, Zhu, Wenchao, Zhang, Cheng, Tu, Xin 
ORCID: 0000-0002-6376-0897 and Shao, Tao
(2020)
Phase-Resolved Measurement of Atmospheric-Pressure Radio-Frequency Pulsed Discharges in Ar/CH4/CO2 Mixture.
Plasma Chemistry and Plasma Processing, 40 (4).
pp. 937-953.
ISSN 0272-4324, 1572-8986
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PCPP-19-AM-0258R1-revised.pdf - Author Accepted Manuscript Download (2MB) | Preview |
Abstract
In order to comprehensively investigate the discharge characteristics of an atmospheric-pressure radio-frequency (RF) pulsed discharge in Ar/CH<inf>4</inf>/CO<inf>2</inf>, a phase-resolved measurement is given in this paper. Firstly, the discharge characteristics of RF plasma in a gas mixture of Ar, CO<inf>2</inf> and CH<inf>4</inf> are investigated under different parameters. It is found peak power is more efficient than duty cycle in increasing the discharge area. Besides, a phase-resolved morphology of RF plasma is given. The discharge in the positive cycle is longer in length and stronger in emission intensity than in the negative cycle. Secondly, different activation paths of species have been obtained by using phase-resolved optical emission spectroscopy. Ar species is mainly activated by electron collision effect, while CH and C<inf>2</inf> are mainly activated by Ar metastable species. Finally, detailed electron kinetics is analyzed. The results show that most energy is transferred to the vibrational excitation compared to elastic activation, electronic excitation, and ionization under different ratios of CO<inf>2</inf> and CH<inf>4</inf> to Ar. Besides, under a higher ratio of CH<inf>4</inf> and CO<inf>2</inf> to Ar, the generating rate of species and power loss rate are higher. It proves that higher fraction of CO<inf>2</inf> and CH<inf>4</inf> is better for the conversion rate and energy efficiency under RF discharge in theory, which guides the reforming of CH<inf>4</inf> and CO<inf>2</inf> in RF discharge.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Radio-frequency plasma, Optical emission spectroscopy, Dry reforming of methane, Discharge characteristics, Activation modes |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 11 May 2020 10:06 |
| Last Modified: | 17 Jun 2025 08:20 |
| DOI: | 10.1007/s11090-020-10071-5 |
| Related Websites: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3086895 |
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