Fast Chemical Reaction Accompanied by Heat and Mass Transfer

Fast Chemical Reaction Accompanied by Heat and Mass Transfer 

In the PF homogeneous reactor, Xa is the conversion of species A into C, (Xa = (ca — Cao) /cao where Ca is the local molar concentration of A), y represents the molar fraction of species (ya = Ca/(ca + Cg + c, + c ), etc.) and kj,k2, m, n p characterize the kinetics as reaction constants with their partial reaction orders. 

The unsteady state model will be completed by adding the unsteady evolution as dXj /dr, dt/dx and respectively on the left part of the equations 

The modeling procedure explained above is not valid for all types of homogeneous reactions, for example, a very fast exothermic reaction such as the combustion of gaseous or vaporized hydrocarbon vith oxygen in air or the reaction of chloride and hydrogen in inert nitrogen, etc. We vill develop an example of such reactions belo v  

For small y values, we obtain small or moderate reaction rates, whereas when y increases, it corresponds to the start of the fast reaction or high temperatures, when the reaction rate can attain a dangerous level. 

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