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用等温热重法和非等温热重法研究了Co(CH3COO)2.4H2O的脱水反应.在51.4℃、55.9℃、59.6℃、61.4℃下的等温热重数据由等转化率下的lnt=E/RT+ln[g(α)/A]进行拟合确定了活化能的大小;升温速率为10℃/min的非等温热重曲线显示Co(CH3COO)2.4H2O的脱水反应发生在55.1~100.2℃,其数据通过Doyle-Zsako法进行拟合,以线性相关系数为判据并结合等温热分析拟合结果,得到该脱水反应的非等温积分动力学模式函数g()α=1-(1-α)1/2,相应的动力学方程是dα/dt=Aexp(-E/RT).2.(1-α)1/2,活化能E=74.16 kJ.mol-1,指前因子lg[A/s-1]=11.48.
The dehydration reaction of Co (CH 3 COO) 2.4H 2 O was studied by isothermal thermogravimetry and non-isothermal thermogravimetric method. The isothermal thermogravimetric data at 51.4 ℃, 55.9 ℃, 59.6 ℃ and 61.4 ℃ were obtained from isothermal conversion lnt = E / RT + ln [g (α) / A]. The non-isothermal thermogravimetry curve with a heating rate of 10 ℃ / min showed that the dehydration reaction of Co (CH 3 COO) 2.4H 2 O occurred At 55.1 ~ 100.2 ℃, the data were fitted by the Doyle-Zsako method. Based on the linear correlation coefficient and the isothermal analysis of the fitting results, the non-isothermal integral kinetic model function g () α = 1- (1-α) 1/2, the corresponding kinetic equation is dα / dt = Aexp (-E / RT) .2. (1-α) 1/2, activation energy E = 74.16 kJ.mol- 1, before the factor lg [A / s-1] = 11.48.