Identification of corona discharge-induced SF/sub 6/ oxidation mechanisms using SF/sub 6///sup 18/O/sub 2//H/sub 2/ /sup 16/O and SF/sub 6///sup 16/O/sub 2//H/sub 2/ /sup 18/O gas mixtures

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · Plasma Chem. Plasma Process.; (United States)

DOI:https://doi.org/10.1007/BF01016158· OSTI ID:6288725

Van Brunt, R J; Siddagangappa, M C

The absolute yields of gaseous oxyfluorides SOF/sub 2/, SO/sub 2/F/sub 2/, and SOF/sub 4/ from negative, point-plane corona discharges in pressurized gas mixtures of SF/sub 6/ with O/sub 2/ and H/sub 2/O enriched with /sup 18/O/sub 2/ and H/sub 2/ /sup 18/O have been measured using a gas chromatograph-mass spectrometer. The predominant SF/sub 6/ oxidation mechanisms have been revealed from a determination of the relative /sup 18/O and /sup 16/O isotope content of the observed oxy-fluoride by-products. The results are consistent with previously proposed production mechanisms and indicate that SOF/sub 2/ and SO/sub 2/F/sub 2/ derive oxygen predominantly from H/sub 2/O and O/sub 2/, respectively, in slow, gas-phase reactions involving SF/sub 4/, SF/sub 3/, and SF/sub 2/ that occur outside of the discharge region. The species SOF/sub 4/ derives oxygen from both H/sub 2/O and O/sub 2/ through fast reactions in the active discharge region involving free radicals or ions such as OH and O, with SF/sub 5/ and SF/sub 4/.

• Research Organization: National bureau of Standards, Gaithersburg, MD (USA)
• OSTI ID: 6288725
• Journal Information: Plasma Chem. Plasma Process.; (United States), Vol. 8:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CORONA DISCHARGES
RADIOCHEMICAL ANALYSIS
OXYFLUORIDES
CHEMICAL REACTION YIELD
SULFUR COMPOUNDS
SULFUR FLUORIDES
OXIDATION
CHEMICAL REACTION KINETICS
GAS CHROMATOGRAPHY
HYDROFLUORIC ACID
IONIZATION
ISOTOPE RATIO
ISOTOPIC EXCHANGE
MASS SPECTROSCOPY
MOLECULAR IONS
OXYGEN
OXYGEN 16
OXYGEN 18
OXYGEN IONS
TRACER TECHNIQUES
WATER VAPOR
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
ELECTRIC DISCHARGES
ELEMENTS
EVEN-EVEN NUCLEI
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONS
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
NONMETALS
NUCLEI
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SEPARATION PROCESSES
SPECTROSCOPY
STABLE ISOTOPES
VAPORS
YIELDS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures