Kinetics of destruction of diisopropyl methylphosphonate in corona discharge

Oleg P. Korobeinichev, Anatoly A. Chernov, Vladimir V. Sokolov, Lev Krasnoperov

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The kinetics of the destruction of diisopropyl methylphosphonate (DIMP) in corona discharge has been studied using a flow tubular coaxial wire dielectric barrier corona discharge reactor. The identification and quantitative determination of DIMP, its destruction intermediates, and phosphorus-containing destruction products were performed using molecular beam mass spectrometry and gas chromatography/mass spectrometry. Active discharge power was varied in the range 0.01-5 W. The destruction products such as isopropyl methylphosphonate, methylphosphonic acid, and orthophosphoric acid were found on the reactor walls. The dependence of the extent of the destruction, D(D = 1 - X/X0, where X and X0 are DIMP mole fractions at the outlet and the inlet of the reactor), on the specific energy deposition Ex(Ex = PF-1 X0-1, where F is the carrier gas flow and P is the power dissipated in discharge reactor) was measured over the DIMP mole fraction range 60-500 ppm at the pressure of 1 bar and the temperature of 340 K. Over the range of the experimental conditions studied the destruction obeys the "pseudo-first-order" kinetic law: 1n(1 - D) = -KEx. Plausible mechanisms of the destruction are discussed. It was concluded that ion mechanism is the major one responsible for the destruction process.

Original languageEnglish (US)
Pages (from-to)331-337
Number of pages7
JournalInternational Journal of Chemical Kinetics
Volume34
Issue number5
DOIs
StatePublished - May 1 2002

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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