Kinetics of Catalytic Reaction for Linear Alkylbenzenes Synthesis Associated with External Diffusion
1.Petrochina Petrochemical Research Institute, Daqing PetroChemical Research Center, Daqing 163714, China;
2.College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Abstract：The solid acid catalyzed alkylation reaction of benzene with linear olefins was carried out in a fixed-bed reactor and the external diffusion mass transfer process was combined with the alkylation reaction to determine the kinetic model equation for the olefin conversion and yield model equations of products for linear alkylbenzene (LAB), short chain olefin (D) and short chain alkylbenzene (DB). The kinetic model of the alkylation associated with the external diffusion was established based on the experimental data and the estimation of model parameters. The results of the study showed that the higher the reaction temperature, the higher the rate constant of each reaction and the mass transfer as well as the lower the selectivity of LAB. The prediction of the olefin conversion rate using the kinetic model of alkylation showed that with the increase of linear velocity of the fluid, the olefin conversion rate increased, and then tended to be constant and the influence of the external diffusion resistance on the reaction tended to be neglected. As the reaction temperature increased, the rate of the chemical reaction increased and the linear velocity of the fluid required for eliminating the external diffusion was greater.
Dong Ping1,Ren Jie2,Shen Lian2. Kinetics of Catalytic Reaction for Linear Alkylbenzenes Synthesis Associated with External Diffusion[J]. 化学反应工程与工艺, 2018, 34(1): 49-57.
