Kinetics of the Methyl-Vinyl Radical + O₂ Reactions Associated with Propene Oxidation.

ABSTRACT: The bimolecular rate coefficients of reactions CH₃CCH₂ + O₂ (1) and cis/ trans-CH₃CHCH + O₂ (2a/3a) have been measured using a tubular laminar flow reactor coupled with a photoionization mass spectrometer (PIMS). These reactions are relevant in the combustion of propene. Pulsed excimer laser photolysis of a ketone or a bromide precursor molecule at 193 or 248 nm wavelength was used to produce radicals of interest homogeneously along the reactor. Time-resolved experiments were performed under pseudo-first-order conditions at low pressure (0.3-1.5 Torr) over the temperature range 220-660 K. The measured bimolecular rate coefficients were found to be independent of bath gas concentration. The bimolecular rate coefficients possess negative

SUBMITTER: Joshi SP 

PROVIDER: S-EPMC6727624 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature