氯化铵热分解过程的机理判别和动力学研究

Identification of Mechanism and Investigation on the Kinetics of Thermal Dissociation of Ammonium Chloride

用热重法研究了氯化铵在氯气气氛下的热分解过程，通过实验数据对各种模型函数的试探表明：该过程受一维相边界反应机理控制，从氯化铵时晶体结构出发提出了氯化铵热分解理论模型，导出了理论速率公式。对固态反应中指前因子和活化能的理论意义进行了初步讨论。

The thermal dissociation of NH_4Cl in a dry nitrogen flow was studied bythermogravimetry. According to the three-stage identification method,the experimental data was ana-lysed.The results show that the thermal dissociation of NH_4Cl is dominated by the one-dimensionalphase boundary reaction. The crystal structure analysis show the mechanism is reasonable.