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The negative temperature coefficient in the C2 to C13 hydrocarbon oxidation. I. Morphological results

โœ Scribed by J.C. Dechaux; L. Delfosse

Book ID
103038919
Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
512 KB
Volume
34
Category
Article
ISSN
0010-2180

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โœฆ Synopsis

In the negative temperature coefficient zone for slow oxidation of alkanes, the morphological characters of the reaction (temperature at which the NTC starts, importance of the NTC, position and width of the cool flame zone) are shown to be predictable when one accepts the competition between the so-called L 1 and L 2 low-temperature mechanisms. The results are explained if we admit that RO 2 ยฐ is the main peroxidic radical present under hydrocarbon-rich conditions, as is RCO3 ยฐ (and RCO') under oxygen-rich conditions. The thermal instability of these radicals is the root cause of the NTC. The relative importance of the L 1 and L 2 mechanisms is related to the influence of four parameters: hydrocarbon/oxygen ratio, temperature, hydrocarbon structure, and the number of carbon atoms in the molecule.

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