Abstract
The chemical oscillating reaction of the MnSO4-KBrO3-diacetoneH2SO4 system has been studied in a continuous-flow stirred-tank reactor (CSTR), and the new characteristics of nonlinear kinetics of this oscillating system are reported. The effects of the temperature, flow rate, concentration of reactants and acidity were investigated. Two different oscillating states (bistability) were observed in this system; the transient color, waveform, potential, oscillating amplitude and period of the two states were different. A change in the solution acidity or flow rate can translate one state to the other, and the two states can exist under the same experimental conditions. Potential and spectrophotometric methods were used to track the change in the reaction intermediates, and possible mechanism of this oscillating system is proposed.
