Entropy production in the reversible Oregonator oscillatory model: The calculation of chemical entropy production rate in the course of a complete oscillation cycle

TLDR: In this paper, the authors extended the five-step reversible Oregonator model of the oscillatory Belousov-Zhabotinskii reaction by introducing reversibility into the various steps.

Abstract: Field expanded the five step Oregonator model of the oscillatory Belousov–Zhabotinskii reaction by introducing reversibility into the various steps. The present work involves the calculation of entropy flow (φ[S]) and entropy production (P[S]) in a specially designed reversible Oregonator. Entropy flow due to thermostatic temperature control and the osmotic transport of the reactants (A,B) and product (P) into and out of the reactor has been considered. Entropy production (e.p.) due to mixing of the reactants and product, diffusion of the intermediates (X, Y, and Z), and most importantly the chemical reactions has been considered. An attempt has been made to calculate the e.p. of the model using the results obtained by Field by numerical integration of the appropriate stiff kinetic differential equations. The following new results are obtained: (a) Limit cycle traces of e.p. against concentration of the oscillatory intermediates have been constructed. (b) The model resides on the low e.p. branch for about...