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A Single Pulse Shock Tube Study of C2 Cl6 Decomposition: Are the Kinetics Consistent With the Proposed Thermochemistry of C2Cl6, CCl3 and C2Cl5?

Published

Author(s)

Jeffrey A. Manion, Iftikhar A. Awan, Wing Tsang

Abstract

Single pulse shock tube studies of the thermal decomposition of hexachloroethane at temperatures of 960 - 1080 K and pressures of 130 -1,100 kPa have been carried our using the comparative rate technique. Decomposition proceeds via spitting of the C-C bond with about a 12% contribution from C-Cl bond fission. A 60% increase in the rate constant was observed over the pressures studied. Fall-off curves for the reaction were derived, and in conjunction with data from the RRKM model was developed that provides a good fit to the relevant kinetic data spanning 250 - 1080 K. The results support recently proposed changes to the heats of formation of highly chlorinated compounds and are consistent with δf H [CCI]3, 298.15 K] = (71.2 3.5) kj mol-1 and δf H [C2Cl5, 298.15 K] = 21.4 6.7) kJ mol-1.
Proceedings Title
Proceedings of the 3rd Joint Meeting of the U.S. Sections of the Combustion Institute
Conference Dates
March 16-19, 2003
Conference Title
Joint Meeting of the Combustion Institute

Keywords

hexachloroethane, hindred-Gorin, kinetics, thermal decomposition RRKM

Citation

Manion, J. , Awan, I. and Tsang, W. (2003), A Single Pulse Shock Tube Study of C<sub>2</sub> Cl<sub>6</sub> Decomposition: Are the Kinetics Consistent With the Proposed Thermochemistry of C<sub>2</sub>Cl<sub>6</sub>, CCl<sub>3</sub> and C<sub>2</sub>Cl<sub>5</sub>?, Proceedings of the 3rd Joint Meeting of the U.S. Sections of the Combustion Institute (Accessed April 16, 2024)
Created January 1, 2003, Updated February 17, 2017