从多重定态到化学振荡

1. 清华大学化学与化学工程系
• 收稿日期:1984-06-22 修回日期:1984-12-18 发布日期:1985-04-15

FROM MULTIPLE STEADY STATES TO CHEMICAL OSCILLATION

Wu Xiaomao; Li Rusheng

1. Department of Chemistry and Chemical Engineering Tsinghua University; Beijing
• Received:1984-06-22 Revised:1984-12-18 Published:1985-04-15

Abstract: So far, almost all systems which show chemical oscillation were discovered by chance.In this paper, we discuss the possibility of designing chemical oscillation by introducing a suitable slow feedback step to a system which shows multiple steady states. A criterion of existence of oscillation solution from kinetic equations for model system is given, and a method to identify the region of oscillation solu- tion in parameter space is proposed. With this method, the mechanism of oscilla- tion phenomena in the oxidation of carbon monoxide on Pt catalyst is analysed.
Experimentally, many chemical reacting systems show multiple steady states. A typical situation is shown in Fig.1, where x represents the value of state variable, λ the value of control parameter. The kinetics of the above system can be described by
dx/dt=f(x, λ) (1)
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