改性β分子筛上异丙醇与苯气相合成异丙苯的反应动力学  

Reaction Kinetics of Cumene Synthesis through Gas-Phase Alkylationof Isopropanol with Benzene over Modified β-Zeolite

作　　者：李建伟[1] 范建光[1] 李英霞[1] 陈标华[1] 李成岳[1] 

机构地区：[1]北京化工大学可控反应科学与技术基础教育部重点实验室,北京100029

出　　处：《催化学报》2005年第5期428-432,共5页

基　　金：中国石油化工集团公司资助项目 (X5 0 3 0 11)

摘　　要：基于热力学分析、在线GC MS测试和变空速实验获得的信息,对改性β分子筛上异丙醇(IPA)与苯常压气相合成异丙苯(IPB)反应的网络结构进行了较为系统的研究,确定了该反应体系的主反应和副反应,提出了能合理解释实验现象的反应网络结构:IPAH2 O +C3 H6+C6 H6-C6 H6IPB +C3H6 DIPB .采用微型等温积分反应器,在n(C6 H6 ) /n(IPA) =8～17和T =5 13～5 73K的条件下,对改性β分子筛上异丙醇与苯气相烷基化反应的动力学特性进行了研究.依据所判识的反应网络结构和幂函数速率方程,以Simplex Marquardt复合法对实验数据进行非线性参数估计。Based on the information from GC-MS on-line measurement under different space velocity and thermodynamic analysis, the reaction network of gas-phase alkylation of isopropanol (IPA) with benzene over modified β-zeolite was systematically investigated. The main reactions and side reactions were identified, and a kinetic reaction network was proposed as follows: IPAH_2O+C_3H_6+C_6H_6-C_6H_6IPB+C_3H_6DIPB, which reasonably explained the experimental results. The alkylation kinetic experiments were carried out in an isothermal integral microreactor under the conditions of n (C_6H_6) / n (IPA) =8～17, T =513～573 K and atmospheric pressure. Based on the reaction network proposed, the parameters in the rate model of power law were estimated by means of Simplex-Marquardt optimal method, and the results were in good agreement with the experimental data.

关 键 词：异丙醇 苯 烷基化 异丙苯 反应动力学 反应网络 Β分子筛 

分 类 号：O643.1[理学—物理化学]