物理化学学报 >> 1995, Vol. 11 >> Issue (01): 9-14.doi: 10.3866/PKU.WHXB19950103

研究论文 上一篇    下一篇

CeO2/SiO2的制备及丁烯异构化动力学

黄维, 俞启全, 金韵   

  1. 北京大学化学系,北京 100871
  • 收稿日期:1993-10-06 修回日期:1993-12-27 发布日期:1995-01-15
  • 通讯作者: 俞启全

Preparation of CeO2/SiO2 and Kinetics of Isomerization of Butene

Huang Wei, Yu Qi-Quan, Jin Yun   

  1. Department of Chemistry,Peking University,Beijing 100871
  • Received:1993-10-06 Revised:1993-12-27 Published:1995-01-15
  • Contact: Yu Qi-Quan

摘要:

用浸渍法制备CeO2/SiO2催化剂.催化剂灼烧温度在300-500℃时2-丁烯异构化活性保持一常数;600℃灼烧时活性下降,活载比在1/32-1/5范围内,随活载比增加催化剂活性呈线性增加.在2-丁烯分压较低时,t-2-丁烯及c-2-丁烯异构成1-丁烯的反应级数接近于一级.1-丁烯分压较大时1-丁烯异构成t-2-丁烯及c-2-丁烯的动力学服从于反应物、反应产物吸附的L-H动力学方程.用正交设计法估计动力学参数.1-丁烯、t-2-丁烯及c-2-丁烯吸附热的估计值与脉冲法测定值一致.

关键词: CeO2/SiO2, 动力学, L-H机理方程

Abstract:

Catalysts, CeO2/SiO2, were prepared by the impregnated method. The activity of the catalysts at calcination temperature of the catalysts in the range 300-500 ℃ was constant and decreased at 600℃. The catalystic activity in the range of ratio of CeO2 to SiO2, 1/5-1/32, increased linearly. The reaction order with respect to t-2-butene or c-2-butene was first proximate1y at low partial pressures of t-2-butene or c-2-butene.At higher partial pressures of t-2-butene or c-2-butene the kinetics of isomerization of 1-butene. The kinetic parameters were estimated by methods of orthogonal design. The estimated values of adsorption of 1-butene, t-2-butene and c-2-butene are coincided with the experimental values by the pulse method.

Key words: CeO2/SiO2, Kinetics, L-H equation