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Kinetic study and modeling of the hetero-homogeneous pyrolysis and oxidation of isobutane around 800 K. Part I. Pyrolysis in an unpacked pyrex reactor

✍ Scribed by R. Zils; R. Martin; D. Perrin

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 234 KB
Volume: 30
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(1998)30:6<425::aid-kin5>3.0.co;2-u

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✦ Synopsis

Isobutane pyrolysis is studied in an unpacked Pyrex reactor at 20-100 torr initial pressures and Results are interpreted in terms of a long chain radical mechanism 750-793 K. and the reaction is modeled. The reaction selectivity or ratio of the initial production rate of isobutene (or hydrogen) to that of propene (or methane) is practically given by the ratio of the rate constant of abstraction of a tertiary hydrogen atom of isobutane to that of a primary one.

A sensitivity analysis clearly shows that self-inhibition is essentially due to methylallyl radicals produced by hydrogen abstraction from isobutene. The model has been manually adjusted to experimental results and most of the adjusted rate constants are in agreement with literature data.

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