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Kinetic study and modeling of the hetero-homo-geneous pyrolysis and oxidation of isobutane around 800 K. Part III. Pyrolysis-oxidation in unpacked and in pbO-coated packed Pyrex reactors

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

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 261 KB
Volume: 30
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(1998)30:9<657::aid-kin7>3.0.co;2-r

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✦ Synopsis

Isobutane pyrolysis has been studied in the presence of oxygen at about in 773 K unpacked and in PbO-coated packed Pyrex reactors. The reaction is shown to be accelerated by oxygen in reactors of low surface-to-volume ratio and strongly inhibited in packed PbOcoated reactors. These oxygen effects are explained in terms of interaction between two radical chain systems, one of pyrolysis, the other of oxidation. Oxygen introduces additional chain initiations and a degenerate chain branching step due to H 2 O 2 while oxygenated radicals are efficiently removed at the reactor wall. All experimental results have been modeled and many rate constants of elementary steps were evaluated. The collision efficiency of radicals on HO 2ў a PbO-coated Pyrex surface has been determined in the temperature range of this study.

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Kinetic study and modeling of the hetero

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

✍ R. Zils; R. Martin; D. Perrin 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 234 KB 👁 2 views

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 t

Kinetic study and modeling of the hetero

Kinetic study and modeling of the hetero-homogeneous pyrolysis and oxidation of isobutane around 800 K. Part II. Pyrolysis in pyrex reactors packed with platinum foils or PbO-treated pyrex rods

✍ R. Zils; R. Martin; D. Perrin 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 231 KB 👁 2 views

Isobutane pyrolysis has been studied at initial pressures and 20-200 torr in a packed reactor treated with PbO and in a reactor packed with platinum foils. 773-793 K, These packings strongly inhibit product formation and this effect is explained by the occurrence of the heterogeneous termination ste