化学学报 ›› 1991, Vol. 49 ›› Issue (8): 763-767. 上一篇    下一篇

研究论文

以咖啡酸-KBrO3-H2SO4-Mn^2+为体系的化学振荡及其十字相图

褚亮;蒋萍初;许海涵   

  1. 上海师范大学化学系
  • 发布日期:1991-08-15

Chemical oscillations in the bromate-manganous-caffeic acid-sulfuric acid system and its cross-shaped diagram

CHU LIANG;JIANG PINGCHU;XU HAIHAN   

  • Published:1991-08-15

本文报道的是一种新的BZ化学振荡反应。该反应是在酸性介质中,在锰离子催化下,咖啡酸被溴酸盐氧化所引起的化学振荡反应。就该体系在间歇反应器和连续流动体系中的振荡行为作了研究,得出了不同浓度、温度及流速下的特征振荡图形,计算出该振荡反应及其诱导期的活化能,并采用改变流速寻找双稳态的方法找出振荡的浓度区间,作出十字相

关键词: 硫酸, 钾化合物, 化学振荡, 锰离子, 溴酸盐, 咖啡酸, 相图

A new organic reductant, caffeic acid, gives rise to sustained oscillation in the bromate-manganous-sulfuric acid system. Oscillation pheneomena can be observed in both batch reactors and continuous-flow stirred tank reactors. The activation energies of the oscillating reaction and its induction period have been calculated from the experimental data with good linear dependent coefficients According to the general stability condition, a typical two-dimensional cros-shaped diagram has been shown by a series of experiments with various flow rates and concns. of reactants.

Key words: SULFURIC ACID, POTASSIUM COMPOUNDS, CHEMICAL OSCILLATIONS, MANGANESE ION, BROMATE, CAFFEIC ACID, PHASE DIAGRAM

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