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研究了Ni/聚合物衍生碳(Ni/PDC)催化甲醇气相羰基化过程的动力学行为。Langmuir-Hinshelwood反应机制用于建立动力学数学模型,在此模型基础上导出反应速率的表达式以及反应速率与碘甲烷、一氧化碳和甲醇等反应物分压之间的数学关系。这些关系得到了实验数据的证实。反应速率对反应温度的依赖性以Arrhenius曲线给出,升高反应温度会导致反应控制机制从动力学控制模式转化为扩散控制模式,同时反应的有效速率表达式和表观活化能都有相应的变化。
The kinetic behaviors of Ni / polymer-derived carbon (Ni / PDC) catalysts for the gas-phase carbonylation of methanol were investigated. The Langmuir-Hinshelwood reaction mechanism is used to establish the kinetic mathematical model. Based on this model, the expression of the reaction rate and the mathematical relationship between the reaction rate and the partial pressure of reactants such as methyl iodide, carbon monoxide and methanol are derived. These relations have been confirmed by experimental data. The dependence of the reaction rate on the reaction temperature is given by the Arrhenius curve. Increasing the reaction temperature leads to a shift of the reaction control mechanism from the kinetic control mode to the diffusion control mode. Both the effective rate expression and the apparent activation energy have a corresponding Variety.