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Kinetics of UV-laser induced dehydrochlorination of 1-chloro-1,1-difluoroethane

โœ Scribed by Z. F. Dong; M. Schneider; J. Wolfrum

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
477 KB
Volume
21
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

The decomposition of 1-chloro-1,l-difluoroethane by a radical chain reaction has been studied in a flow reactor in the temperature range from 503 to 773 K. For the initiation of the chain small amounts of added chlorine were photolyzed with a XeCl laser (A = 308 nm). The formation of the dehydrochlorination and chlorination products, vinylidene fluoride, and 1,2-dichloro-l,l-difluoroethane respectively, is described by a kinetic model. Arrhenius parameters for the two abstraction reactions Ct + CH,CClF, -% HCl + CH2CCIF2 and C1 + CHpCICCIFz 3 HCl + CHClCC1F2 were determined by a competition method: log,,(k,/cm3 mol-'s 'J = (13.6 t 0.1) -(9200 2 300)/4.5762' log,,(k,jcm3 mol-' s-') = (13.7 ? 0.1) -(6500 _t 200)/4.576T

Experimental and modeling results are discussed with respect to former studies on the thermal reaction of 1-chloro-1,l-difluoroethane.

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