27.12 MHz plasma generation in supercritical carbon dioxide

Journal Article · Tue May 01 00:00:00 EDT 2007 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2724240· OSTI ID:20982843

Kawashima, Ayato; Toyota, Hiromichi; Nomura, Shinfuku; Takemori, Toshihiko; Mukasa, Shinobu; Maehara, Tsunehiro; Yamashita, Hiroshi ^[1]

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1. Department of Environmental Science for Industry, Faculty of Agriculture, Ehime University, 3-5-7, Tarumi Matsuyama, Ehime 790-8566 (Japan)

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}.

• OSTI ID: 20982843
• Journal Information: Journal of Applied Physics, Vol. 101, Issue 9; Other Information: DOI: 10.1063/1.2724240; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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