Effect of reactor volume on concentration oscillations of Belousov-Zhabotinsky reaction system in CSTR

The effect of reactor volume on concentration oscillations in the cerium-ca talyzed Belousov-Zhabotinsky reaction is observed by varying mean residence time of feed as a bifurcation parameter. Three CSTRs different in volume w ere used in the experiment with the same stirring conditions. Chemical osci llations are investigated by measuring the redox potential between Ce3+ and Ce4+ using a Pt-wire electrode. Owing to the effect of nonlinear coupling between essential chemical oscillations and external forcing oscillations b y the peristaltic pump, chaotic oscillations occur in shorter mean residenc e time. It has been found that this coupling effect affects the greater con centration oscillations in smaller CSTR. At the bifurcation point between s ingle-peak oscillation and chaotic oscillation state, intermittent oscillat ions are observed. It has been found that stable single-peak oscillations c an be observed throughout wide mean-residence-time region with increasing v olume of reactor.