【摘要】 通过对四个不同初始反应物浓度下的实验数据拟合,得到反应动力学模型的动力学参数。利用此模型得到的180℃,185℃,190℃,195℃下的反应速率常数与Arrhenius方程相符合,得到180~195℃反应活化能40~76 kJ/mol,其中间羧基苯甲醛(3-CBA)氧化活化能最高,说明其受温度的影响最大,间甲基苯甲酸(MT)氧化活化能次之。MT氧化为3-CBA为反应控制步骤。更多还原

【Abstract】 A kinetics model was proposed to describe catalytic oxidation of MX to isophthalic acid.The model parameters were obtained by fitting of experimental data at four different initial MX concentrations.The reaction rate constants obtained at 180℃,185℃,190℃ and 195℃ accorded with Arrhenius equation satisfactorily.The activation energies of four steps ranged from 40kJ/mol to(76kJ/mol.)Among them,the activation energy of 3-carboxybenzaldehyde to isophthalic acid step was the highest and that of m-toluic acid to 3-carboxybenzaldehyde was the second highest.Catalytic(oxidation) of m-toluic acid to 3-carboxybenzaldehyde was the control step of the reaction system.更多还原