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在常压下,应用内循环式无梯度反应器,研究了在国产工业镍催化剂上苯气相加氢的本征动力学.假设催化剂表面上存在两类不同的活性中心,氢及苯各自吸附在相邻的不同类型的活性中心上,设第一个氢原子加入苯环的步骤为反应速率控制步骤,据此以导出反应的动力学方程,与实验数据颇相符合,平均偏差6.1%.测得的本征反应活化能为13.1kcal/mol.苯的吸附热为9.84kcal/mol,与不存在化学反应时的测定结果相接近.
The intrinsic kinetics of gas-phase hydrogenation of benzene over domestic commercial nickel catalysts was investigated at atmospheric pressure using an internal recycle gradientless-type reactor. It is assumed that there are two different types of active sites on the surface of the catalyst. Hydrogen and benzene are adsorbed on Adjacent to different types of active centers, the first hydrogen atoms into the benzene ring step for the reaction rate control step, based on which to derive the reaction kinetics equation quite consistent with the experimental data, with an average deviation of 6.1%. The activation energy of the intrinsic reaction was 13.1 kcal / mol. The heat of adsorption of benzene was 9.84 kcal / mol, which was close to that of the reaction without chemical reaction.