The absolute bimolecular rate constants for the reactions of C6H5 with alkanes containing primary CH bonds (C2H6 and neo-C5H12) and tertiary CH bonds (2-methylpropane, 2,3-dimethylbutane, and 2,3,4-trimethylpentane determined by pulsed laser photolysis (PLP)/MS using C6H5COCH3 as a C6H5 precursor at 565-1000 K and by cavity ringdown spectrometry at 290-500 K. Additional measurements were carried out with the PLP/MS method for 2-methylpropane, extending the temperature range to 972 K. The other major products, C6H5CH3, which was formed by the recombination of C6H5 and CH3 generated by the pulsed photolysis of acetophenone, was quantitatively modeled. The sensitivity analysis showed that the yields of C6H6 and C6H5CH3 depended tremendously on the reactions, such as C6H5 + CH3. For the CH(CH3)3 reaction, the contribution from the primary C-H attack, based on the preliminary data of C6H5 reactions with ethane and neo-pentane, amounted to about 7% at 500K and 40% at 1000 K. Original is an abstract.
|Number of pages||1|
|Journal||International Symposium on Combustion Abstracts of Accepted Papers|
|State||Published - 1 Jan 2000|
|Event||28th International Symposium on Combustion - Edinburgh, United Kingdom|
Duration: 30 Jul 2000 → 4 Aug 2000