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Kinetics and mechanism of the pyrolysis of 1-Chloro-1, 1-difluoroethane in the presence of chlorine

✍ Scribed by G. Huybrechts; Y. Hubin

Publisher: John Wiley and Sons
Year: 1986
Tongue: English
Weight: 339 KB
Volume: 18
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550180408

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✦ Synopsis

The first stage thermal reactions of CFzCICH, in the presence of chlorine have been studied between 554 and 614 K. These are c12 CFZClCH, -CFZCH, + HCI and CF,ClCH, + CI;! CFZClCH&l + HCI Rate equations derived from a radical mechanism are shown to fit the experimental results. Values of Arrhenius parameters for the decomposition of the CF2C1CHz-radical and its reactions with C1, and C1 are given.

Experimental

CF2C1CH3 (Solvay, 99.98% pure) and Clz (Matheson, ultrahigh purity, 99.9% pure) were used after distillation on the vacuum line.

Reactions were carried out in two cylindrical quartz vessels R1

(unpacked, V = 100 mL) and R, (packed with quartz tubing, V = 70 mL) with surface-to-volume ratios S / V of about 1.4 and 10 crn-l, respectively. The reactor walls were seasoned by pyrolyzing pure CF2ClCH3 a t high temperature (700 K for R, and 780 K for R,) until

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