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本文用自行设计加工的耐压不锈钢密封池在CDR-1型差动热分析仪上测得的一条DSC曲线,利用计算非等温动力学的积分方程和微分方程拟合四组实验数据,逻辑选择确定2,6-二硝基苯酚在分解深度为0.007-0.66范围内的热分解反应的最可几数学模式为F(α)=α。用放热速率方程算得其热分解反应的级数为零,其表观活化能、指前因子的测量真值分别为134±9k Jmol~(-1)、10~(9.17±0.77)S~(-1)。积分方程逻辑选择求得的表观活化能和指前因子的测量真值相应为133±8kJmol~(-1)和10~(9.01±0.79)S~(-1)。微分方程逻辑选择求得的表观活化能和指前因子的测量真值相应为134±8kJmol~(-1)和10~(9.10±0.63)S~(-1)。三者吻合良好。
In this paper, a DSC curve measured on a CDR-1 differential thermal analyzer with a pressure-sealed stainless steel sealed tank designed by itself is used to calculate four sets of experimental data by using the integral equations and differential equations for calculating non-isothermal kinetics. The most probable mathematical model determining the thermal decomposition of 2,6-dinitrophenol at a decomposition depth of 0.007-0.66 is F (α) = α. The extinction rate equation was used to calculate the number of thermal decomposition reactions. The apparent activation energy and the pre-exponential factor were 134 ± 9k Jmol -1 and 10 ± 9.17 ± 0.77 S ~ (-1). The apparent activation energy and the measured true value of the pre-exponential factor obtained by the logical selection of the integral equation correspond to 133 ± 8 kJmol -1 and 10 ± 9.01 ± 0.79 S -1, respectively. The apparent activation energy and the measured true value of the pre-exponential factor obtained by the logical selection of the differential equation correspond to 134 ± 8 kJmol -1 and 10 ± 9.10 ± 0.63 S -1, respectively. The three agree well.