简单级数反应的特征时间法

在化学反应的热动力学研究中，建立适宜的研究方法从热谱曲线上获得动力学参数是其中心内容．目前，已先后建立了无量纳参数法［‘j，对比进度法［‘］，模拟热谱曲线法［’］等并已得到广泛应用［‘j．这些方法均未直接利用到时间参量，热谱解析过程都较为复杂．我们在前文［到将时间作为已知参数，建立一种不需要反应进行到底就可获得化学反应速率常数的简单级数反应的时间变量法．但是，该法数据处理时需要取三个时间点以及相应的热谱数据，而时间滞后效应对于取多个时间点所带来的动力学计算误差有时是不能忽略的．因此，本文基于热动力…

Characteristic Time Method for Simple Order Reactions

On the theoretical basis of thermokinetics, a thermdeinetic research methed for simple order reactions - Characteristic time methed has been proposed in this pape.The method only ed characteristic data of thermoanalytic curve tm, m. and A, and uses data processing on compuer to give rate constant. In order to test the validity of thes methed,the saponificaion of ethyt butyrate and ethyt benzoate in aqueous ethanol solven and the fonnation of hexamethylene tetramine in aqueous solution have been studied.The rate constants calculated with this method are in agreement with those in the literatures , and therefore, the characteristic time method for simple crder reactions is beieved to be correct.