Temperature and pressure effects on formation and decomposition of phenylvinylperoxy radicals in the C6H5C2H 2 + O2 reaction

J. Park*, Ming-Chang Lin

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

The effects of temperature and pressure on the formation and decomposition of C6H5C2H2O2 in the C6H5C2H2 + O2 reaction have been investigated at temperatures from 298 to 378 K by directly monitoring the C6H5C2H2O2 radical in the visible region by cavity ringdown spectrometry (CRDS). The rate constant for the C6H5C2H2 + O2 association and that for fragmentation of C6H5C 2H2O2 were found to be k1 (C 6H5C2H2 + O2 → C6H5C2H2O2) = (3.20 ± 1.19) × 1011 exp(+760/T) cm3 mol -1 s-1 and k2 (C6H5C 2H2 O2 → C6H5CHO + HCO) = (1.68 ± 0.13) × 104 s-1, respectively. Additional kinetic measurements by pulsed laser photolysis/mass spectrometry show that C6H5CHO was produced in the C6H 5C2H2 + O2 reaction as predicted and the formation of C6H5CHO from the decomposition of C 6H5C2H2O2 is temperature-independent, consistent with the CRDS experimental data.

Original languageEnglish
Pages (from-to)305-310
Number of pages6
JournalProceedings of the Combustion Institute
Volume32 I
Issue number1
DOIs
StatePublished - 1 Jan 2009
Event32nd International Symposium on Combustion - Montreal, QC, Canada
Duration: 3 Aug 20088 Aug 2008

Keywords

  • Cavity ringdown spectroscopy
  • Oxygen
  • Phenylvinyl
  • Phenylvinylperoxy

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