ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Overall and detailed kinetic descriptions of the pyrolysis of C3H8 have been proposed as a result of a turbulent flow reactor investigation in the temperature range of 1110-1235 K and at atmospheric pressure. The overall reaction was described by a first-order rate expression with an activation energy of 58.65 kcal/mol and a preexponential factor of 3.2 × 1012 sec-1. This expression agrees with previously reported rate data. In addition, a kinetic mechanism involving 13 chemical species and 32 elementary reactions has been postulated to describe the kinetics. Experimental data from the present flow reactor experiments and from static vessel and shock tube experiments reported in the literature were used to verify the mechanism. Agreement over the temperature range of 800-1400 K and over the pressure range of 0.1-8.5 atm was obtained by adjusting three rate constants. Previously reported values for these rate constants appear to require reexamination. The reactions in question are the following: The sum of the rate constants for reactions (2a) and (2b) and the rate constant for reaction (23) are best represented by \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{2a} + k_{2b} = 10^{- 0.1} T^4 \exp (-8300/{\rm RT}){\rm cm}^3 /{\rm mol}\;{\rm sec} $$\end{document} and \documentclass{article}\pagestyle{empty}\begin{document}$$ k_{23} = 10^{14.55} \exp (-14,340/{\rm RT}){\rm cm}^3 /{\rm mol}\;{\rm sec} $$\end{document} which differ with the expressions in the literature.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550130206
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