Dynamics and mechanisms of CO production from the reactions of CH2 radicals with O(3P) and O2

W. M. Shaub*, D. S.Y. Hsu, T. L. Burks, Ming-Chang Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A cw CO laser has been used to probe the complete CO vibrational energy distributions in the reactions of CH2 radicals with O(3P) and O2 (3-g. The CO formed from the reaction with the atom was concluded to be produced via two equally important channels, (O + C H2 → C O + H2; → C O + 2H,), with an average vibrational energy of 19 kcal/mole, and an approximate vibrational temperature of ≈104K (for v≤12), which is sufficient to account for previously observed CO stimulated emission from O(3P)+CH2. The population inversion derives mainly from the molecular hydrogen elimination channel. In the reaction of CH2 with molecular oxygen, the CO formed is believed to be produced from both a molecular elimination path giving H2O+CO and from two possible atomic or radical production processes, yielding H+CO+OH. We find from analysis of the CO product vibrational energy distribution that 30% of the CO formed is produced via the former path, and 70% is formed from the latter path. This information is important to the detailed kinetic modeling of acetylene and other hydrocarbon combustion systems.

Original languageEnglish
Pages (from-to)811-818
Number of pages8
JournalSymposium (International) on Combustion
Volume18
Issue number1
DOIs
StatePublished - 1 Jan 1981

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