Simulation of Slurry Reactor for Anthraquinone Hydrogenation
YU Yue1, CHENG Yi2, ZHOU Junchao2, WANG Lijun1, CHENG Youwei1, LI Xi1
1. College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
2. Zhejiang Hengyi Research Center, Hangzhou 310019, China
Abstract：In this paper, a mathematical model of slurry reactor for anthraquinone hydrogenation was constructed. The model was based on the two-dimensional axisymmetric hydrodynamic model for a slurry reactor, combined with the reaction kinetics model, mass transfer model and heat transfer model. Through simulation, key information could be obtained, such as gas-liquid-solid flow field distribution, distribution of reactant concentration, distribution of temperature and residence time distribution in the slurry reactor. The simulation results indicated that the material in the slurry reactor presented the characteristics of circulating flow with the center upwards and the wall downwards. The fluid back-mixing was strong. The liquid back-mixing was close to fully mixed flow and the gas back-mixing was similar to the flow of two-stage equal tanks in series. The concentrations of reactants and catalyst were higher at the bottom and lower at the top, and the reaction at the bottom of the slurry reactor was more intense. The gas-liquid mass transfer rate greatly impacted on the reaction. Affected by the feed, the temperature in the slurry reactor was lower at the bottom and slightly higher at the top, but the temperature rise in whole column was controlled within 5 K after the jacket heat exchange. The results simulated by the reactor model was in good agreement with industrial data, and the model could be applied to the design and optimization of industrial installations.
YU Yue,CHENG Yi,ZHOU Junchao et al. Simulation of Slurry Reactor for Anthraquinone Hydrogenation[J]. Chemical Reaction Engineering and Technology, 2022, 38(3): 225-234.
