Abstract
Ignition takes place in a mixture of chloromethane and chlorine at atmospheric pressure and room temperature 0.1 s after the irradiation of the mixture with a UV light pulse from a mercury quartz lamp. Temperature fields are presented, which demonstrate the development of the ignition process in the dark period. Calculations show that, after the initiation is stopped, the concentration of chlorine atoms decreases to a critical value within a time of the order of 0.02 s. The observed ignition can be explained by chains branching caused by the decay of the excited CCl *3 radical that have accumulated energy upon the successive substitution of chlorine atoms for hydrogen in the chloromethane molecule.
Similar content being viewed by others
References
Rozlovskii, A.I., Kinet. Katal., 1990, vol. 31, no. 2, p. 463.
Rozlovskii, A.I., Steblev, A.V., and Frolov, Yu.E., Dokl. Akad. Nauk SSSR, 1978, vol. 241, no. 3, p. 631.
Begishev, I.P., Gromovenko, O.L., and Poluektov, V.A., Dokl. Akad. Nauk SSSR, 1994, vol. 334, no. 3, p. 326.
Kondrat’ev, V.N., Konstanty skorosti gazofaznykh reaktsii (Rate Constants of Gas-Phase Reactions), Moscow Nauka, 1970.
Brahan, K.M., Hewitt, A.D., Boone, G.D., and Hewitt, S.A., Int. J. Chem. Kinet., 1996, vol. 28, no. 6, p. 397.
Gurvich, L.V., Karachevtsev, G.V., Kondrat’ev, V.N., Lebedev, Yu.A., Medvedev, V.A., Potapov, V.K., and Khodeev, Yu.S., Energii razryva khimicheskikh svyazei. Potentsialy ionizatsii i srodstvo k elektronu (Bond Dissociation Ebergies, Ionization Potentials, and Electron Affinities), Moscow Nauka, 1974.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © I.R. Begishev, A.K. Belikov, I.S. Nikitin, 2017, published in Kinetika i Kataliz, 2017, Vol. 58, No. 3, pp. 235–240.
Rights and permissions
About this article
Cite this article
Begishev, I.R., Belikov, A.K. & Nikitin, I.S. Ignition induced the short-term action of UV light as possible evidence of chain branching in the reacting CH3Cl + Cl2 mixture. Kinet Catal 58, 227–232 (2017). https://doi.org/10.1134/S0023158417030016
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0023158417030016