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Nonlinear chemical reaction between Na2S2O3 and Peroxide compound

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Abstract

Kinetics of reaction between Na2S203 and peroxide compound (H202 or Na2S2O3) in a batch reactor and in a continuous stirring tank reactor (CSTR) were studied. Steady oscillations in uncatalyzed reactions in a CSTR were first discovered. In Na2S203-H2O2-H2S04 reaction system, Pt potential and pH of higher and lower flow rates beyond oscillation flow rates were in around the same extreme values. The reaction catalyzed by Cu2+ consists of the catalyzed oscillation process and the uncatalyzed osciliation one. On the basis of experiment, a reaction mechanism consisting of three stages was put forward. The three stages are H+ positive-feedback reactions, proton negative-feedback (uncatalyzed negative-feedback and catalyzed negative-feedback) reactions and transitional reactions. The mechanism is able to explain reasonably the nonlinear chemical phenomena appearing in the thiosulfate oxidation reaction by peroxide compounds.

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Authors and Affiliations

  1. Department of Chemistry, Nanki University, 300071, Tianjin, China

    Qingyu Gao, Yaomin Wang, Guichang Wang, Songlin Zhang, Yaru Zang & Xuezhuang Zhao

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  1. Qingyu Gao
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  2. Yaomin Wang
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  3. Guichang Wang
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  4. Songlin Zhang
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  5. Yaru Zang
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  6. Xuezhuang Zhao
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Project supported by the National Natural Science Foundation of China.

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Gao, Q., Wang, Y., Wang, G. et al. Nonlinear chemical reaction between Na2S2O3 and Peroxide compound. Sc. China Ser. B-Chem. 40, 152–160 (1997). https://doi.org/10.1007/BF02876406

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  • DOI: https://doi.org/10.1007/BF02876406

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