摘要
以丙二酸为有机底物的Belousov-Zhabotinskii振荡反应(简称B-Z反应)研究较多。Archana Mittal等以硝基苯酚、邻苯二酚等一系列有机底物代替丙二酸研究了B-Z反应的振荡行为。但以棓酸即没食子酸(gallic acid)或焦棓酚为有机底物的B-Z反应研究甚少。A.K.Dutt等报导了在静止反应器中,这是一个振荡周期无规律的特殊振荡反应。迄今为止,未曾见在连续流动搅拌反应器(CSTR)中有关该物系振荡行为的研究。我们在CSTR中,详细考察了该物系的振荡行为,自动记录到有规律的振荡波形,以及温度对物系的影响,计算出活化能E_α=62.4kJ mol^(-1),并从FKN机理出发,对该物系所具有的特殊性作了定性解释。
In perfect mixture of CSTR, oscillation behavior of B-Z reaction system with gallic acid as organic substrates have been studied.We have found the regular oscillation curves, the sharp colur changes (purple red to blue) in reaction solution; and oscillation periods keep unchange.The dependence of oscillation behavior upon temperature is investgated. Oscillation behavior only take place in the temperaturerange 317K<T<333K.When temperature is smaller than317K or bigger than 333K,there is no oscillation. We have determined the kinetics parameter activation energy E_a=62.4 kJ mol^(-1) by the oscillation periods in different temperature.
In this paper, we have also discussed the mechanism of this oscillation reaction Some special regularity of this system can well be explained by modified FKN mechanism The theonetical analysis is in accordance with the experiment results.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1989年第2期246-249,共4页
Acta Physico-Chimica Sinica
