摘要
为了研究振荡机理与物性的关系 ,研究了新型的振荡体系—甘露醇 (MO) -KBrO3 -MnSO4- (Act) -H2 SO4体系的振荡特性 ,即产生分区振荡和双诱导期 .通过改变反应物的初始浓度及反应温度 ,用电极测出溶液电势随时间的变化曲线 ,得到动力学参数tin1、tin2 、tp1、tp2 与各反应物的定量关系和表观活化能 .结合反应物和各种添加物对振荡的影响 ,推导出振荡体系各部分的反应过程和反应机理 ,即第一振荡区的机理符合FKN机理 ,第二振荡区符合Br2 -水解模式 .
In order to study relations between oscillating mechanisms and material property, a new oscillating system of Mannitol(MO)_KBrO 3_MnSO 4_H 2SO 4 has been used to study the double induction periods and dual_frequency oscillations. Through changing initial reaction conditions (concentrations of reactants and temperature) and by Electrode detecting change of electricity potential of solution, quantitative relations between the oscillatory kinetic parameters( t in1 ? t in2 ? t p1 ? t p2 ) and concentrations of reactants have been established and according to the Arrehenius equation, the apparent activation energy of the oscillatary induction periods and oscillation periods are obtained within the temperature rang of 25℃～45℃. By combining the influences of reactants and additives, the mechanisms and course of the reaction have been estalished for the system: the first frequency oscillation can be rationalized by FKN Mechanism and the second oscillation can be rationalized by Bromine_hydrolysis control mechanism.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2002年第4期122-124,127,共4页
Journal of Harbin Engineering University
关键词
甘露醇
分区振荡
双诱导期
Mannitol
Dual_frequency
Double induction periods
