Two reaction zones in a competing reactions system with initially separated components.
The long-time properties of a system with initially separated components and two competing reactions, reversible A1+B<-->C1 and irreversible A2+B-->C2, are studied. It is assumed that the backward constant g(1) of the reversible reaction A1+B<-->C1 is small. The dynamics of the system is described by means of a crossover from an "irreversible" regime (for times t<<g(-1)(1)) to a "reversible" regime (for times t>>g(-1)(1)). It is shown that in contrast to the "irreversible" regime, where both reactions occur in one reaction zone, the "reversible" regime is characterized by two distinctive reaction zones. These are the A1+B<-->C1 reversible reaction zone and the A2+C1-->A1+C2 irreversible reaction zone. Numerical computations of the mean-field kinetic equations confirm these asymptotic results.
Department of Materials Engineering, Ben Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel.
Misha
M
Sinder
Joshua
J
Pelleg