Criteria of thermal stability of exothermically reacting systems. Second order reactions

The method of thermal explosion (TE) critical condition calculation for any type of exothermic reactions was proposed. The method is a generalization of the TE classical theory and it is based on the fact that the values of temperature and conversion level are very sensitive to the change in parameters at the limit of ignition. The universal algebraic equation of critical conditions for any kind of kinetic function was obtained. The application of the method to the calculation of the second order exothermic reactions allows to determine the TE degeneration conditions and to define the regions of critical conditions. The difference between the algebraic results obtained and results of numerical calculation is several percent up to TE degeneration.