环己烷催化脱氢反应的动力学研究  

KINETIC STUDY OF CATALYTIC DEHYDROGENATION OF CYCLOHEXANE

作　　者：胡云霞[1] 安越[1] 刘凯[1] 徐国华[1] 

机构地区：[1]浙江大学材料科学与化学工程学院,杭州310027

出　　处：《太阳能学报》2009年第5期693-697,共5页Acta Energiae Solaris Sinica

基　　金：国家高技术研究发展计划(863)项目(2007AA05Z112)

摘　　要：针对有机液体脱氢技术,研究了以Raney-Ni为催化剂,在"湿-干多相态"反应模式下的环己烷脱氢反应。考察了在不同环己烷用量以及不同温度条件下环己烷脱氢反应的动力学,初步建立了脱氢反应动力学模型。研究表明:理论模型与实验结果吻合较好,Raney-Ni对环己烷脱氢反应具有很好的催化作用;在多相态反应模式下,环己烷的脱氢反应可分为两个阶段,即多相态反应阶段(液-固)和气相反应阶段(气-固);催化剂表面形成的多相态条件与环己烷用量及反应温度密切相关。模型分析得到在多相态条件下,反应温度为280～340℃时,Raney-Ni催化环己烷脱氢反应的活化能为29.11kJ·mol^(-1)。Dehydrogenation of cyclohexane catalyzed by Raney-Ni under ＂wet-dry muhiphase conditions＂ was studied. The kinetics of the dehydrogenation of cyclohexane under different reactant supply and different reaction temperatures were studied, and a kinetic model was developed. It has been found that the model fits well with experimental data and Raney- Ni exhibits fine catalytic activity. Dehydrogenation of cyclohexane under ＂wet-dry muhiphase conditions＂ contains two processes, one is multiphase reaction （liquid-solid）, the other is gas phase reaction （gas-solid）. Formation of muhiphase conditions on catalyst surface is closely connected with reactant supply and reaction temperature. Model analysis manifested that within the temperature range from 280℃ to 340℃, the dehydrogenation activation energy of cyclohexane catalyzed by Raney-Ni under multiphase conditions was 29.11kJ·mol^-1.

关 键 词：环己烷 脱氢 多相态 RANEY-NI 

分 类 号：TK91[动力工程及工程热物理]