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研究了在TiO_2催化下α-苯乙醇脱水生成苯乙烯的反应动力学,确定了表观动力学常数,并求得反应活化能为9.6千卡/克分子,指前因子为1.27×10~3克分子/克·小时。认为反应属于Lewis酸催化,主要是弱酸部位起催化作用。提出了反应机理和反应的控制步骤。导出了与实验结果相吻合的速度方程。
The reaction kinetics of dehydration of α-phenylethanol to styrene was investigated. The apparent kinetic constants were determined and the activation energy of the reaction was found to be 9.6 kcal / mol and the pre-exponential factor was 1.27 × 10 -3 Mole / gh It is considered that the reaction belongs to the Lewis acid catalysis, and the catalyst mainly acts as a weak acid site. Proposed reaction mechanism and reaction control steps. The velocity equations that match the experimental results are derived.