Ca(OH)₂/CaO体系是非常有前景的热化学储能介质， 其动力学研究是了解整个储能体系的反应速率及能量储、释速率的重要途径。文中采用热重分析法，对Ca(OH)₂在氮气气氛、不同升温速率下的热分解过程进行了探究。结果表明：，Ca(OH)₂样品分别在623.15~773.15 K和873.15~973.15 K出现两个分解失重过程，且失重率分别接近21%和2%。应用多重速率扫描法对热分解过程进行动力学分析，发现所得动力学参数与反应转化百分率、升温速率以及选用的模型方法有关。最概然机理函数分析表明：实验条件下， Ca(OH)₂热分解动力学模型符合相边界反应的收缩圆柱体模型。研究还发现在不同升温速率条件下，指前因子A的自然对数和活化能E之间都存在着线性关系。

The Ca(OH)2/CaO system is a very promising thermochemical energy storage medium, and its kinetic research provides an important way ofto understanding  the reaction and energy storage/release rates of the whole energy storage system. In this paper, a thermogravimetric analysis iswas  conducted to investigate the thermal decomposition processes of Ca(OH)2 samples in pure N2 atmosphere at different heating rates. The results show that during the thermal decomposition of Ca(OH)2 samples, two weight loss processes occur at 623.15~773.15 K and 873.15~973.15 K, and the weight loss rates are close to 21% and 2%, respectively. The kinetic analysis of the thermal decomposition process through the multiple scanning indicates that the obtained apparent kinetic parameters depend on the reaction conversion rate, the heating rate and the selected model approach. Through the most probable mechanism function analysis, it is also found that the thermal decomposition kinetics model of Ca(OH)2 under experimental conditions accords well with the shrinking cylinder mechanism with surface reaction rate controlling. Besides, there exists a linear relationship between the activation energy E and the natural logarithm of the pre-exponential factor A at different heating rates.