CAJ | 학술논문

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.
연구료Ni/취합물연생탄(Ni/PDC)최화갑순기상탄기화과정적동역학행위.Langmuir-Hinshelwood반응궤제용우건립동역학수학모형,재차모형기출상도출반응속솔적표체식이급반응속솔여전갑완、일양화탄화갑순등반응물분압지간적수학관계.저사관계득도료실험수거적증실.반응속솔대반응온도적의뢰성이Arrhenius곡선급출,승고반응온도회도치반응공제궤제종동역학공제모식전화위확산공제모식,동시반응적유효속솔표체식화표관활화능도유상응적변화.
Methanol carbonylation over nickel supported on polymer-derive carbon was studied kinetically. Langmuir-Hinshelwood mechanism was a better choice for this case. From the kinetic model a rate expression was derived where several assumptions were introduced and the dependence of rate on the concentrations of methyl iodide, carbon monoxide and methanol was validated by experimentally observed data. The dependence of rate on the temperature was given in form of Arrhenius plot. By increasing temperature, the transition from kinetic regime to the diffusion-controlled regime was observed and changes of the effective rate and the apparent activation energy were discussed.