IGNITION AND TRANSITION CONDITIONS FOR INFLAMMATION AND EXTINCTION FOR A FIRST-ORDER HETEROGENEOUS REACTION

The problem of determining the thermal states of reacting solid surfac es or gas at a surface and the critical conditions for their inflammat ion and extinction is of importance both in the combustion of carbon ( coal) and for some highly exothermic heterogeneous catalytic processes . This paper examines the effect of ambient temperature on the critica l conditions for inflammation and extinction when both diffusion and c hemical kinetics are taken into consideration. The transition conditio ns (the boundary at which criticality disappears) are determined using different modified definitions. The exact Arrhenius form of the react ion rate and different modes of heat transfer are manipulated in this theoretical study.