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Citation: Gao Qing-Yu, Li Bao-Min, Sun Kang, Cai Zun-Sheng, Zhao Xue-Zhuang. Nonlinear Dynamics in ClO^－₂-SC(NH₂)₂ Reaction System[J]. Acta Physico-Chimica Sinica, ;2001, 17(03): 257-260. doi: 10.3866/PKU.WHXB20010315 shu

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

1.
China University of Mining and Technology,College of Chemical Engineering,Xuzhou　221008;Nankai University,Department of Chemistry,Tianjin　300071

Received Date: 12 September 2000
Available Online: 15 March 2001

The reaction between chlorite and thiourea could display batch oli os 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 oli oscillation 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).
- Oli oscillation;pH oscillation;Dynamics;Nonlinear mechanism
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Nonlinear Dynamics in ClO^－₂-SC(NH₂)₂ Reaction System