摘要
用浸渍法制备CeO_2/SiO_2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.
Catalysts, CeO2/SiO2, were prepared by the impregnated method. The activity of the catalysts at calcination temperattire 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 prokimate1y at low partial pressuxes of t-2-butene or c-2-butene.At higher partial pressuxes of t-2-butene or c-2-butene the kinetics of isomerization of 1-butene obeys the L-H mechanism equation with adsorption of 1-butene, t-2-butene and c-2-butene. The kinetic paraxneters were estimated by the method 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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1995年第1期9-14,共6页
Acta Physico-Chimica Sinica