Cu/ZnO/Al_2O_3催化剂上仲丁醇脱氢反应动力学研究

采用管式连续流动固定床反应器,对仲丁醇在Cu/ZnO/Al_2O_3催化剂上的脱氢反应本征动力学进行了研究,通过双曲线动力学模型和幂函数动力学模型两种模型计算了该反应的各项参数以及反应的表观活化能,将实验数据用SPSS统计分析软件对动力学模型进行非线性最小二乘法参数拟合,确定了反应机理并求出了表观活化能。实验结果表明,采用双曲线动力学模型时,仲丁醇在催化剂表面的脱氢反应为速率控制步骤,表观活化能为64.75 kJ/mol;采用幂函数动力学模型时表观活化能为81.89 kJ/mol。用相关指数R~2和F分布对两个速率方程进行了检验,两个速率方程的R~2均接近于1,F>10F_α,且用双曲线动力学模型时结果的相关度较高。

Kinetics of Dehydrogenation of 2-Butanol on Cu/ZnO/Al2O3 Catalyst

Reaction kinetics for 2-butanol dehydrogenation on Cu/ZnO/Al_2O_3 catalyst was studied in a continuous flow fixed-bed reactor.The kinetics parameter fitting was carried out with the nonlinear least square method by means of SPSS statistical analysis software.The reaction mechanism was described by means of Langmuir-Hinshelwood mechanism and empirical model.The model parameters and the apparent activation energy of the dehydrogenation reaction were calculated.The results showed that 2-butanol dehydrogenation...