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

作　　者：刘海苗[1] 熊孝根[1] 赵长春[1] 郑菊花[1] 高庆宇[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221008

出　　处：《物理化学学报》2008年第10期1897-1901,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20573134);教育部高校博士点基金(20050290512);中国矿业大学青年科研基金(OH080256)资助项目

摘　　要：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.

关 键 词：复杂振荡 衰减振荡 扰动 数值模拟 

分 类 号：O643.1[理学—物理化学]