State-transition in the chemical birhymicity of CuSO4-H2O2-KSCN-NaOH reaction system by modulating flowrate

Two types of birhymicity( I, II) of CuSO4-H2O2-KSCN-NaOH reaction system ar e found to be in continuous flow stirred tank reactor(CSTR). The transition s between two oscillatory states in the birhymicity II region of the presen t chemical reaction have been induced by the application of a sinusoidal fl owrate signal. One-way transition, i.e,, from one oscillation to another os cillation(OSS1<->OSS2 or OSS2<->OSS1), only occurs in the two critical regi ons of birhymicity II. The switching between OSS1 and OSS2 can be observed at k(f)(0) = 4.0 mL/min in OSS1 and k(f)(0) = 3.0 mL/min in OSS2 by certain periodical modulation.