酪氨酸-溴酸钾-硫酸铈-丙酮-硫酸振荡体系的量热研究  

Investigation of a Tyrosine-Acetone-Bromate-Cerous Sulfate-Acid Oscillatory System by Calorimetry

作　　者：史竞艳[1] 刘欲文[2] 王志勇[2] 朱晶玲[2] 汪存信[2] 

机构地区：[1]武汉生物工程学院化学与环境工程系,湖北武汉430415 [2]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《广州化工》2012年第21期41-43,共3页GuangZhou Chemical Industry

基　　金：湖北省教育厅科研资助基金(B20094006);武汉市教育局科研资助基金(2008K016)

摘　　要：采用量热法研究了封闭体系中酪氨酸-溴酸钾-硫酸铈-丙酮在酸性介质中的振荡行为。考察了各反应物初始浓度和温度对振荡周期tp,诱导期tind,诱导期放热Qind的影响。基于可逆的Oregonator模型和溴水解控制(BHC)模型,提出了一个包含17个动力学步骤和10个中间变量的混合模型,数值模拟的结果与实验结果具有较好的一致性。The tyrosine-acetone-bromate-Ce4＋-H2SO4 Belousov-Zhabotinskii reaction system was investigated by calorimetry method in a closed system.The outstanding feature of this system was that both organic substrates（tyrosine and acetone） can be brominated.The effects of the initial concentrations of reactants and temperature on induction time,oscillation period and heat released in the induction time were studied.A mixed model was proposed,which consisted of 17 reactions based on the reversible Oregonator model and the bromine hydrolysis controlled（BHC） model.The numerical simulation results showed an agreement with that of experimental behaviors.

关 键 词：BZ振荡反应 量热法 混合模型 

分 类 号：O542.3[理学—物理]