By-product formation in spark breakdown of SF/sub 6//O/sub 2/ mixtures

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Plasma Chem. Plasma Process.; (United States)

DOI:https://doi.org/10.1007/BF01016160· OSTI ID:6363322

Sauers, I

The yields of SOF/sub 4/, SO/sub 2/F/sub 2/, SOF/sub 2/, and SO/sub 2/ have been measured as a function of O/sub 2/ content in SF/sub 6//O/sub 2/ mixtures, following spark discharges. All experiments were made at a spark energy of 8.7 J/spark, a total pressure of 133 kPa, and for O/sub 2/ additions of 0, 1, 2, 5, 10, and 20% to SF/sub 6/. Even for the case of no added O/sub 2/, trace amounts of O/sub 2/ and H/sub 2/O result in the formation of the above by-products. However, addition of O/sub 2/ significantly increases the yields of SOF/sub 4/ and SO/sub 2/F/sub 2/, while SOF/sub 2/ is only slightly affected. The net yields for SOF/sub 4/ and SO/sub 2/F/sub 2/ formation range from 0.18 x 10/sup -9/ and 0.64 x 10/sup -10/ mol x J/sup -1/, respectively, at 1% O/sub 2/ content to 10.45 x 10/sup -9/ and 7.15 x 10/sup -10/ mol x J/sup -1/, respectively, at 20% O/sub 2/ content. The mechanism for SOF/sub 4/ production appears to involve SF/sub 4/, an important initial product of SF/sub 6/, as a precursor. Comparison of the SOF/sub 4/ and SO/sub 2/F/sub 2/ yield from spark discharges (arc and corona) shows that the yields from other discharges (arc and corona) shows that the yields can vary by at least three orders of magnitude, depending on the type of discharge and on other discharge parameters.

• Research Organization: Oak Ridge National Lab., TN (USA)
• OSTI ID: 6363322
• Journal Information: Plasma Chem. Plasma Process.; (United States), Journal Name: Plasma Chem. Plasma Process.; (United States) Vol. 8:2; ISSN PCPPD
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
BREAKDOWN
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COLLISIONS
CORONA DISCHARGES
CURRENTS
ELECTRIC ARCS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ELECTRODES
ELECTRON COLLISIONS
ELEMENTS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
IONS
KINETICS
MASS SPECTROSCOPY
MOLECULAR IONS
NONMETALS
OXIDATION
OXYFLUORIDES
OXYGEN
OXYGEN COMPOUNDS
QUANTITY RATIO
REACTION KINETICS
SPECTROSCOPY
SULFUR COMPOUNDS
SULFUR FLUORIDES
SYNTHESIS
VAPORS
WATER VAPOR
YIELDS