物理化学学报 >> 2001, Vol. 17 >> Issue (03): 257-260.doi: 10.3866/PKU.WHXB20010315

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亚氯酸盐-硫脲反应体系的非线性动力学

高庆宇;李保民;孙康;蔡遵生;赵学庄   

  1. 中国矿业大学化工学院,江苏徐州　221008;南开大学化学系,天津　300071
  • 收稿日期:2000-09-12 修回日期:2000-11-21 发布日期:2001-03-15
  • 通讯作者: 高庆宇 E-mail:gaoyu1@public.xz.js.cn

Nonlinear Dynamics in ClO－2-SC(NH2)2 Reaction System

Gao Qing-Yu;Li Bao-Min;Sun Kang;Cai Zun-Sheng;Zhao Xue-Zhuang   

  1. China University of Mining and Technology,College of Chemical Engineering,Xuzhou　221008;Nankai University,Department of Chemistry,Tianjin　300071
  • Received:2000-09-12 Revised:2000-11-21 Published:2001-03-15
  • Contact: Gao Qing-Yu E-mail:gaoyu1@public.xz.js.cn

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关键词: 准振荡, pH振荡, 动力学, 非线性机理

Abstract: The reaction between chlorite and thiourea could display batch oligoos cillation and CSTR oscillation of pH.Batch pH peak has the same character with p H oscillation in a CSTR.The oxidation of thiourea produced intermediates such as HOSC(NH)NH2,HO2SC(NH)NH2,HO3S(NH)NH2 and bisulfite.The valence change of sulfur has close relation with pH dynamics.Through the mechanistic analysis,a general model of sulfur(－II) oxidation,which consists of negative hydrogen ion feedback (S(－II) to S(0)),a transition process of S(0) to S(IV) and positive proton feed back from S(IV) to S(VI),could simulate batch oligooscillation and CSTR oscillat ion.This result is setting up a new channel to uncover the reaction mechanism an d simulate the nonlinear phenomena in the reactions between chlorite and Sulfur( －II).

Key words: Oligooscillation, pH oscillation, Dynamics, Nonlinear mechanism