过氧化氢氧化硫化钠反应体系的复杂振荡

Complex Oscillations in the Oxidation of Sulfide by Hydrogen Peroxide

研究了过氧化氢和硫化钠反应体系在连续流动搅拌反应器中的复杂振荡行为.观察到11型振荡、12型振荡、非周期振荡以及衰减振荡;在振荡周期内,拐点附近区域H+扰动产生的延迟与振荡相位pH有关.在完全基于硫价态变化的经验速率方程模型的基础上进行数值模拟,得到的各种复杂振荡行为与实验现象基本一致,证明了硫价态变化可驱动复杂非线性动力学行为.

Nonlinear dynamics of the hydrogen peroxide-sulfide reaction was investigated in a continuous flow stirred tank reactor （CSTR）, in which various complex oscillations including 1^1 type, 1^2 type, mixed-mode and damped oscillations were observed. Perturbation experiments showed that the delay effect of hydrogen ions depended on the oscillatory phase at which the perturbation was applied. Numerical simulations were carried out with a model which was developed thoroughly based on changing oxidation states of sulfur. The calculation qualitatively reproduced the various complex oscillations seen in experiments, suggesting that complex dynamical behaviors could be driven by sulfur （-II） oxidation.