Temperature Dependence of the Rates of Oxidation and Decomposition of Combustible Gases

It is shown that the oxidation of gas outside the ignition region consists of isothermal chain processes with no progressive self-acceleration. The functional nature of the rate of the reaction’s temperature dependence under these conditions is determined. When heated to critical temperature, the qu...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2021-03, Vol.95 (3), p.538-546
Main Authors: Azatyan, V. V., Abramov, S. K., Bolod’yan, I. A., Gordienko, D. M., Kopylov, N. P., Prokopenko, V. M., Shebeko, Yu. N.
Format: Article
Language:English
Subjects:
Acceleration
Chains
Chemistry
Chemistry and Materials Science
Critical temperature
Dependence
Flammability
Ignition
In Commemoration of Academician V.v. Lunin: Selected Contributions from His Students and Colleagues
Mathematical analysis
Oxidation
Physical Chemistry
Temperature dependence
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Summary:It is shown that the oxidation of gas outside the ignition region consists of isothermal chain processes with no progressive self-acceleration. The functional nature of the rate of the reaction’s temperature dependence under these conditions is determined. When heated to critical temperature, the quasi-stationary mode of the reaction is replaced by a chain avalanche. As it develops self-heating and its role become noticeable. Analytical expressions are obtained that describe the kinetics of the process outside the ignition region and in the combustion mode. The difference between the temperature dependences of the rates in these modes is shown. The law of the temperature dependence of the rate of unbranched-chain processes in the modes of ignition and explosion is demonstrated.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024421030043