Petroleum Science >2013,??Issue 2:??251-261 DOI: https://doi.org/10.1007/s12182-013-0274-5
CFD-PBE simulation of gas-phase hydrodynamics in a gas-liquid-solid combined loop reactor Open?Access
文章信息
作者：Qi Nana,Zhang Kai,Xu Gang,Yang Yongping and Zhang Hu
作者单位：
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;School of Chemical Engineering, University of Adelaide, South Australia, SA 5005, Australia
投稿时间：2012-09-12
引用方式：Qi, N., Zhang, K., Xu, G. et al. Pet. Sci. (2013) 10: 251. https://doi.org/10.1007/s12182-013-0274-5
文章摘要
The computational fluid dynamics (CFD)–population balance equations (PBE) coupled model is employed to investigate the hydrodynamics in a gas-slurry internal loop reactor with external slurry
circulation. The predicted radial profiles of local gas holdup and bubble diameter are in good agreement with the corresponding experimental data. The spatio-temporal velocity profile of the gas phase reveals that the upward movement of gas is slowed down and the residence time of gas is prolonged by the downward momentum of the slurry. Introduction of the external slurry can greatly improve the uniformity of gas holdup distribution in the reactor, especially in the downcomer-tube action region. Moreover, the interaction between the downward slurry and upward gas can lead to small bubble size and high interfacial area as well as good mass and heat transfer. The above results suggest the function of external slurry circulation for the internal loop reactor and would be helpful for optimizing the design and scale up of reactors.
circulation. The predicted radial profiles of local gas holdup and bubble diameter are in good agreement with the corresponding experimental data. The spatio-temporal velocity profile of the gas phase reveals that the upward movement of gas is slowed down and the residence time of gas is prolonged by the downward momentum of the slurry. Introduction of the external slurry can greatly improve the uniformity of gas holdup distribution in the reactor, especially in the downcomer-tube action region. Moreover, the interaction between the downward slurry and upward gas can lead to small bubble size and high interfacial area as well as good mass and heat transfer. The above results suggest the function of external slurry circulation for the internal loop reactor and would be helpful for optimizing the design and scale up of reactors.
关键词
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CFD-PBE simulation, external slurry circulation, gas-liquid-solid, hydrodynamics, population balance model