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Title: 27.12 MHz plasma generation in supercritical carbon dioxide

Abstract

An experiment was conducted for generating high-frequency plasma in supercritical carbon dioxide; it is expected to have the potential for applications in various types of practical processes. It was successfully generated at 6-20 MPa using electrodes mounted in a supercritical cell with a gap of 1 mm. Emission spectra were then measured to investigate the physical properties of supercritical carbon dioxide plasma. The results indicated that while the emission spectra for carbon dioxide and carbon monoxide could be mainly obtained at a low pressure, the emission spectra for atomic oxygen could be obtained in the supercritical state, which increased with the pressure. The temperature of the plasma in supercritical state was estimated to be approximately 6000-7000 K on the assumption of local thermodynamic equilibrium and the calculation results of thermal equilibrium composition in this state showed the increase of atomic oxygen by the decomposition of CO{sub 2}.

Authors:
; ; ; ; ; ;  [1];  [2];  [2];  [2]
  1. Department of Environmental Science for Industry, Faculty of Agriculture, Ehime University, 3-5-7, Tarumi Matsuyama, Ehime 790-8566 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
20982843
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 101; Journal Issue: 9; Other Information: DOI: 10.1063/1.2724240; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CARBON DIOXIDE; CARBON MONOXIDE; DECOMPOSITION; DISSOCIATION; ELECTRON TEMPERATURE; EMISSION SPECTRA; ION TEMPERATURE; LTE; MHZ RANGE 01-100; OXYGEN; PHYSICAL PROPERTIES; PLASMA; PLASMA DIAGNOSTICS; PRESSURE DEPENDENCE; PRESSURE RANGE MEGA PA 01-10; PRESSURE RANGE MEGA PA 10-100; SUPERCRITICAL STATE; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE OVER 4000 K; THERMAL EQUILIBRIUM

Citation Formats

Kawashima, Ayato, Toyota, Hiromichi, Nomura, Shinfuku, Takemori, Toshihiko, Mukasa, Shinobu, Maehara, Tsunehiro, Yamashita, Hiroshi, Department of Engineering for Production and Environment, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Department of Mathematics, Physics, and Earth Sciences, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, and Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577. 27.12 MHz plasma generation in supercritical carbon dioxide. United States: N. p., 2007. Web. doi:10.1063/1.2724240.
Kawashima, Ayato, Toyota, Hiromichi, Nomura, Shinfuku, Takemori, Toshihiko, Mukasa, Shinobu, Maehara, Tsunehiro, Yamashita, Hiroshi, Department of Engineering for Production and Environment, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Department of Mathematics, Physics, and Earth Sciences, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, & Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577. 27.12 MHz plasma generation in supercritical carbon dioxide. United States. doi:10.1063/1.2724240.
Kawashima, Ayato, Toyota, Hiromichi, Nomura, Shinfuku, Takemori, Toshihiko, Mukasa, Shinobu, Maehara, Tsunehiro, Yamashita, Hiroshi, Department of Engineering for Production and Environment, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Department of Mathematics, Physics, and Earth Sciences, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, and Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577. Tue . "27.12 MHz plasma generation in supercritical carbon dioxide". United States. doi:10.1063/1.2724240.
@article{osti_20982843,
title = {27.12 MHz plasma generation in supercritical carbon dioxide},
author = {Kawashima, Ayato and Toyota, Hiromichi and Nomura, Shinfuku and Takemori, Toshihiko and Mukasa, Shinobu and Maehara, Tsunehiro and Yamashita, Hiroshi and Department of Engineering for Production and Environment, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577 and Department of Mathematics, Physics, and Earth Sciences, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577 and Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577},
abstractNote = {An experiment was conducted for generating high-frequency plasma in supercritical carbon dioxide; it is expected to have the potential for applications in various types of practical processes. It was successfully generated at 6-20 MPa using electrodes mounted in a supercritical cell with a gap of 1 mm. Emission spectra were then measured to investigate the physical properties of supercritical carbon dioxide plasma. The results indicated that while the emission spectra for carbon dioxide and carbon monoxide could be mainly obtained at a low pressure, the emission spectra for atomic oxygen could be obtained in the supercritical state, which increased with the pressure. The temperature of the plasma in supercritical state was estimated to be approximately 6000-7000 K on the assumption of local thermodynamic equilibrium and the calculation results of thermal equilibrium composition in this state showed the increase of atomic oxygen by the decomposition of CO{sub 2}.},
doi = {10.1063/1.2724240},
journal = {Journal of Applied Physics},
number = 9,
volume = 101,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}