高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (8): 1292.

• 研究快报 • 上一篇    下一篇

一种新的ⅥA族化学反应振荡器:Na2S2O8-KSCN-CuSO4体系

林娟娟, 高庆宇, 宋浩, 黄振炎, 赵学庄   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1996-01-30 出版日期:1996-08-24 发布日期:1996-08-24
  • 通讯作者: 赵学庄
  • 作者简介:林娟娟,女,36岁,讲师.
  • 基金资助:

    国家自然科学基金

A New Chemical Oscillator in Group ⅥA:Na2S2O8-KSCN-CuSO4 System

LIN Juan-Juan, GAO Qing-Yu, SONG Hao, HUANG Zhen-Yan, ZHAO Xue-Zhuang   

  1. Department of Chemistry, Nankai University, Tianjin 300071
  • Received:1996-01-30 Online:1996-08-24 Published:1996-08-24

PDF (PC)

关键词: 化学振荡, 非线性化学反应, 过硫酸盐, 硫氰酸盐

Abstract: A new chemical oscillator in group Ⅵ A was first discovered in the Na2S2O8-KSCN-CuSO4 system.In a batch reactor the reaction displays single-peak behavior in redox potential.In a continous stirring tank reactor(CSTR) the reaction displays sustained oscillations both in redox potential and pH.Depending upon the composition and flow rate of the input stream, we find either a low pH(pH=l~4) steady state,sustained oscillation(pH=5~6) ,or a high pH(pH=9~10)steady state.The reaction system still displays oscillation behavior when the reductant (SCN-)is in excess.The oscillatory region is very narrow in NaOHconcentration(3×10-3 mol/L<[NaOH] <1×10-2 mol/L).

Key words: Chemical oscillation, Nonlinear chemical reaction, Peroxodisulfate, Thiocyanate

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