摘要
The global reaction rate of benzene hydrogenation to cyclohexane accompanied by partial internal wetting of catalyst pellets was measured by a new method, which investigated both adsorption and chemical reaction.The adsorption investigation was used to establish a relationship between the extent of liquid filling of the catalyst and the bulk conditions while the chemical reaction investigation was to study the effect of partial internal wetting of the catalyst on the global reaction rate.It was shown that the extent of liquid filling in the catalyst interior showed a significant effect on the global rate, and the current state of the catalyst depended on the history, i.e. whether it was a liquid evaporation process or a vapor condensation process, and two steady states were found under certain circumstances.A mathematical model was developed, which took multicomponent diffusion, chemical reaction, pore size distribution of the catalyst and capillary condensation of condensable components in the catalyst pellet into consideration.The predicted values were in good agreement with the experimental data.
The global reaction rate of benzene hydrogenation to cyclohexane accompanied by partial internal wetting of catalyst pellets was measured by a new method, which investigated both adsorption and chemical reaction. The adsorption investigation was used to establish a relationship between the extent of liquid filling of the catalyst and the bulk conditions while the chemical reaction investigation was to study the effect of partial internal wetting of the catalyst on the global reaction rate. It was shown that the extent of liquid filling in the catalyst interior showed a significant effect on the global rate, and the current state of the catalyst depended on the history, i.e. whether it was a liquid evaporation process or a vapor condensation process, and two steady states were found under certain circumstances. A mathematical model was developed, which took multicomponent diffusion, chemical reaction, pore size distribution of the catalyst and capillary condensation of condensable components in the catalyst pellet into consideration. The predicted values were in good agreement with the experimental data.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第4期637-641,共5页
CIESC Journal
基金
国家自然科学基金项目 (20106005)
中国石化总公司项目 (201085)~~
关键词
部分润湿
毛细冷凝
反应动力学
苯加氢
Adsorption
Benzene
Capillary tubes
Catalysts
Condensation
Evaporation
Hydrogenation
Mathematical models
Pore size
Reaction kinetics
Wetting
