甲醇和油酸酯化反应过程中等效介电系数 随反应物浓度和温度的二元展开 张文聪黄卡玛 四川大学 电子信息学院,成都610064 摘要:作为一个时变非平衡态系统,化学反应体系内的电磁场分布和吸收特性随 时间非线性变化,而体系的等效介电系数可直接反映出微波在该体系中的传播和吸收特 性.本文将甲醇和油酸酯化反应的等效介电系数扩展为以浓度和温度为变量的二元函数, 并控制反应温度成正弦规律变化.通过测量反应体系的等效介电系数随反应时间变化, 得出该反应体系的等效介电系数方程.并对反应过程的测量值和计算值进行比较,吻合 效果较好. 关键词:微波化学;等效介电系数;混合溶液 中图分类号:TN015 文献标识码:A Bivariate Expansion for Effective Permittivity of Esterification of Methanol and Oleic Acid with One Reactant's Concentration and Temperature LIU Xing - pengZHU Hua - chengZHANG Wen - cong HUANG Ka - ma Faculty of Electronics & Information Engineering Sichuan University Chengdu 610064 China Abstract: As a time varying and non -equilibrium system the electromagnetic field distribution and ab sorption characteristics in the chemical reaction system change over time nonlinearly and effective permittivity can directly reflect microwave transmission and absorption characteristics of the system. In this paper effective permittivity of esterification between methanol and oleic acid can be expanded as function of two variables inclu ding concentration and temperature and the temperature in the reaction varies in the form of sine function with time during measurement process. A formula of effective permittivity in the chemical reaction can be obtained by measuring the variation of effective permiuivity of the reacting mixture solution with the reaction time. The cal culated results are in good agreement with the measured results. Key words: microwave chemistry; effective permittivity; mixed solution 增刊刘兴鹏.朱铧丞,张文聪等:甲醇和油酸酯化反应过程中等效介电系数随反应物浓度和温度的二元展 257