摘要
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Int=E／RT＋1n[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dn／dt=Aexp（-E／RT）·2·（1-α）^1/2．活化能E=74．16kJ·mol^-1，指前因子Ig[A／s^-1]=11．48．
The dehydration of Co（CHaCOO）2 4H2O has been studied isothermally and non-isothermally using TG method. The isothermal TG studies were carried out at the temperature of 51.4 ℃、55.9 ℃. 59.6 ℃ .61.4 ℃. The activation energy was obtained by means of lnt = E/RT ＋ ln[g（（α）/A] using the data at the same conversion rate α. Non-isothermal experiment was carried out at a rate of 10 ℃/min in 40 mL N2/min, Co（CH3COO）2 · 4H2O dehydrated at 55.1～100.2 ℃. The data from non-isothermal experiment were analyzed by Doyle-Zsako method. Combined with the isothermal results, it was found that the integral kinetic function of the dehydration of Co（CH3COO）2 · 4H2O g（α） = 1 - （1 -（α）^1/2 , the kinetic equation dα/dt = Aexp（-E/RT） · 2 · （1-α）^1/2 , the aetivation energy E =74.16 kJ/mol, and the pre exponential factor lg[A/s^-1] = 11.48 .
基金
安徽省教育厅科研基金资助项目(2004kj044)
