环己醇脱氢催化反应本征动力学研究

采用管式连续流动固定床积分反应器,对环己醇在Cu－Co/MgO催化剂上的脱氢反应本征动力学进行了研究,求出幂式速率模型各项参数,得到反应的表观活化能为44.28kJ/mol.将上述实验数据与由似平衡浓度法导出的速控步骤的数学模型相关联,求出各有关参数和物种的吸附烙.结果表明,以环己醇吸附和表面反应为速控步骤的模型可较好地进行关联.对上述模型进行了方差和残差分析,误差在宏观动力学研究允许范围内,实验无系统误差.方差分析表明,表面反应为速控步骤的模型对描述反应具有相对最小误差.

Kinetics Study on Catalytic Dehydrogenation of Cyclohexanol

Abstract A continuous flow fixed bed reactor was used to study the heterogeneous catalytic reaction ki-netics for dehydrogenation of cyclohexanol. The kinetic parameter of power velocity model was calculatedand the reaction's apparent activation energy Ea, was equal to 44. 28 kj/mol. The velocity-controlling mod-els were derived from self-equilibration method, and the model's parameter and the material's adsorptionenthalpy were calculated. The results showed that the models based on adsorption of cyclohexanol and sur-face reaction were correlated. The results of variance and residual error showed that the error was in therange of kinetic toleration, and the experiment did not have any system error. The velocity-controllingmodel based on surface reaction had a relatively minimal error.