On a nonstationary theory of thermal explosion in a semi-batch reactor. Homogeneous systems

A thermal explosion in a semi-batch ideal-mixing reactor in which a homogeneous sequential exothermic reaction occurs is numerically simulated. It is shown that the critical condition of a thermal explosion, separating the low- and high-temperature modes of the reaction is realized only after the completion of the stage of introduction of the second reactant into the reactor. With increasing time of this stage, the interval of transition from the low- to the high-temperature mode expands with increasing value of the Semenov criterion, and eventually, the thermal explosion becomes degenerate.