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 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.