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Modeling of argon-steam thermal plasma flow for abatement of fluorinated compounds
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SYSNO ASEP 0560198 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modeling of argon-steam thermal plasma flow for abatement of fluorinated compounds Author(s) Jeništa, Jiří (UFP-V) RID, ORCID
Chau, S.-W. (TW)
Chien, S. W. (TW)
Živný, Oldřich (UFP-V) RID
Takana, H. (JP)
Nishiyama, H. (JP)
Bartlová, M. (CZ)
Aubrecht, V. (CZ)
Murphy, A.B. (AU)Number of authors 9 Article number 375201 Source Title Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 55, č. 37 (2022)Number of pages 20 s. Language eng - English Country GB - United Kingdom Keywords combined diffusion coefficients ; hybrid-stabilized electric arc ; inhomogeneous mixing ; mole fraction ; plasma species Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GC17-10246J GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000820465300001 EID SCOPUS 85134247065 DOI 10.1088/1361-6463/ac7aee Annotation This study presents a numerical model of the hybrid-stabilized argon-steam thermal DC plasma torch of a new design for generating an argon-steam plasma suitable for efficient abatement of persistent perfluorinated compounds. The model includes the discharge region and the plasma jet flowing to the surrounding steam atmosphere contained in a plasma-chemical chamber. Compared to previous studies, the torch had a smaller nozzle diameter (5.3 mm) and a reduced input power (20-40 kW) and arc current (120-220 A). The outlet region for the plasma jet extends to 20 cm downstream of the exit nozzle. Fluid dynamic and thermal characteristics together with diffusion of argon, hydrogen and oxygen species, and distribution of plasma species in the discharge and the plasma jet are obtained for currents from 120 to 220 A. The results of the calculations show that the plasma jet exhibits high spatiotemporal fluctuations in the shear layer between the plasma jet and colder steam atmosphere. The most abundant species in the plasma jet are hydrogen and oxygen atoms near the jet center, and molecules of H2, O2 and OH in colder surrounding regions. Satisfactory agreement is obtained with measurements of the radial temperature and electron number density profiles near the jet center close to the nozzle exit. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2023 Electronic address https://iopscience.iop.org/article/10.1088/1361-6463/ac7aee
Number of the records: 1