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.
|Number of pages||6|
|Journal||Proceedings of the Combustion Institute|
|State||Published - 1 Jan 2009|
|Event||32nd International Symposium on Combustion - Montreal, QC, Canada|
Duration: 3 Aug 2008 → 8 Aug 2008
- Cavity ringdown spectroscopy