Effect of water vapor on the production of S{sub 2}F{sub 10} and S{sub 2}OF{sub 10} by spark discharges in SF{sub 6}

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Because of its toxicity, S{sub 2}F{sub 10} is of concern to users of SF{sub 6}-filled electrical equipment. While no significantly high concentrations of S{sub 2}F{sub 10} has been found in high voltage power equipment, thus far, it is important to understand the mechanism of and the influence of SF{sub 6} impurities on the formation of S{sub 2}F{sub 10} in order to assess the potential buildup of this byproduct in high voltage equipment under a wide range of discharge conditions. Production rates of the compounds disulfur decafluoride (S{sub 2}F{sub 10}) and bis(pentafuorosulfur) oxide (S{sub 2}OF{sub 10}) have been measured following spark ... continued below

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4 p.

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Sauers, I. December 31, 1995.

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  • Sauers, I. Oak Ridge National Lab., TN (United States). Health Sciences Research Div.

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Description

Because of its toxicity, S{sub 2}F{sub 10} is of concern to users of SF{sub 6}-filled electrical equipment. While no significantly high concentrations of S{sub 2}F{sub 10} has been found in high voltage power equipment, thus far, it is important to understand the mechanism of and the influence of SF{sub 6} impurities on the formation of S{sub 2}F{sub 10} in order to assess the potential buildup of this byproduct in high voltage equipment under a wide range of discharge conditions. Production rates of the compounds disulfur decafluoride (S{sub 2}F{sub 10}) and bis(pentafuorosulfur) oxide (S{sub 2}OF{sub 10}) have been measured following spark discharges in SF{sub 6} as a function of water content for water concentrations in the range 600--3,400 ppm (parts-per-million). Sparks were produced by capacitive discharge (80 J per spark) into SF{sub 6} at a pressure of 100 kPa. Absolute yields were determined from the spark energy from direct measurements of the voltage and current waveforms. In dry SF{sub 6} the spark yield of S{sub 2}F{sub 10} is 2.2 {times} 10{sup {minus}11} mol J{sup {minus}1}. Adding water to SF{sub 6} the spark yield of S{sub 2}F{sub 10} is 2.2 {times} 10{sup {minus}11} mol J{sup {minus}1}. Adding water to SF{sub 6} results in a decrease in the yield of S{sub 2}F{sub 10} and an increase in the S{sub 2}OF{sub 10} yields. Production of both S{sub 2}F{sub 10} and S{sub 2}OF{sub 10} are believed to be formed via the precursor SF{sub 5}. Mechanism for production of these two disulfur compounds will be discussed.

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4 p.

Notes

OSTI as DE96005433

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  • 11. international conference on gas discharges and their applications, Tokyo (Japan), 11-16 Sep 1995

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  • Other: DE96005433
  • Report No.: CONF-9509308--1
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/201698 | External Link
  • Office of Scientific & Technical Information Report Number: 201698
  • Archival Resource Key: ark:/67531/metadc665978

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Oct. 3, 2017, 6:58 p.m.

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Sauers, I. Effect of water vapor on the production of S{sub 2}F{sub 10} and S{sub 2}OF{sub 10} by spark discharges in SF{sub 6}, report, December 31, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc665978/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.