Ca(H_4C_6OHCOO)_2·2H_2O在空气中失水过程热动力学研究  

Thermal kinetics of dehydration process of Ca(H_4C_6OHCOO)_2 · 2H_2O in air

作　　者：孙秋香[1] 张梅芳[2] 刘蒙[2] 张克立[2] 

机构地区：[1]湖北第二师范学院化学系,武汉430205 [2]武汉大学化学与分子科学学院,武汉430072

出　　处：《华中师范大学学报（自然科学版）》2009年第4期619-621,651,共4页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金项目(20071026);湖北第二师范学院校管重点课题(2007A002)

摘　　要：用热分析(TG/DTG)技术研究了固态水杨酸钙(Ca(H_4C_6OHCOO)_2·2H_2O)在空气中的热分解过程.热分析结果表明,Ca(H_4C_6OHCOO)_2·2H_2O在空气中分4步分解.用Friedman法、Flynn-Wall-Ozawa(FWO)法和ASTM E698法求取了Ca(H_4C_6OHCOO)_2·2H_2O(s)失水过程的活化能E,并通过多元线性回归法给出了可能的机理函数.The thermal decomposition processes taking place in the solid-state Ca（H4C6OHCOO）2 · 2H2O have been studied in air using TG/DTG techniques. TG/ DTG curves showed that the decomposition proceed through four well-defined step in air. The activation energies of dehydration process were calculated through the Fried- man, Flynn-Wall-Ozawa and ASTM E698 methods, and the possible comversion functions are estimated through the multiple-linear regression method.

关 键 词：Ca(H4C6OHCOO):·2H2O TG/DTG 失水过程 非等温动力学 

分 类 号：O642.1[理学—物理化学]