Kinetics Model of Thermal Decomposition Reaction of Powdered Bastnaesite
Kinetics Model of Thermal Decomposition Reaction of Powdered Bastnaesite
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发表时间：
2000
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通讯作者：
T. Gan
中科院分区：
文献类型：
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作者：
T. Gan
研究了四川省冕宁氟碳铈矿单晶矿粉的热分解过程，测试了氟碳铈矿在空气中的热分解过程TG-DTA曲线。根据Criado提出的动力学机理模型，采用热分析技术对动力学数据进行了计算和处理，绘制了氟碳铈矿粉体热分解反应的动力学曲线。将该曲线与标准曲线进行比较，并结合以往动力学参数计算的研究结果，结果表明其反应机理为成核和晶核生长，其反应动力学模型的微分和积分形式可表示为：f（α）=（1-α）和g（α）=-ln（1- α）
The thermal decomposition procedure of the powder of the single bastnaesite crystal ore collected in Mianning, Sichuan Province, was investigated, and the thermal decomposition procedure TG DTA curves of the bastnaesite were tested in the air. According to the kinetics mechanism model provided by Criado, the kinetics data were calculated and treated with thermal analysis technique, and the kinetics curves of the thermal decomposition reaction of the bastnaesite powder were drawn. Comparing this curve with the standard curves and combining with the previous research results of kinetics parameters calculation, the results show that its reaction mechanism is nucleation and nuclei growth, and its differential and integral forms of reaction kinetics model can be expressed as: f(α)=(1-α) and g(α) =-ln(1- α )