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MP-PIC simulation of the effects of spent catalyst distribution and horizontal baffle in an industrial FCC regenerator. Part I: Effects on hydrodynamics
Yang, Zhijun1,2; Zhang, Yongmin1; Oloruntoba, Adefarati1; Yue, Junrong3
2021-05-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume412Pages:16
AbstractImproving distribution uniformity of spent catalyst and adding horizontal baffles are two effective measures to improve the regeneration performance of a fluid catalytic cracking (FCC) unit. In this study, an industrial coaxial compact FCC regenerator is simulated using a Eulerian- Lagrangian multi-phase particle in cell (MP-PIC) method. By using the energy-minimization multi-scale (EMMS) drag model based on turbulent flow regime, the MP-PIC simulation predicts the typical solids fraction profile which is in good agreement with industrial data. The Crosser grid (a typical horizontal baffle) is successfully constructed with the help of ?virtual baffles? in simulation. The simulation results show that, after adding Crosser grid (a new horizontal fluidized bed baffle by our group), the bed height increases slightly, the lateral mal-distribution index of solids decreases and the descending flux of spent catalysts decreases significantly. The distribution uniformity of spent catalyst distribution along the bed cross section is more uniform when spent catalyst particles are distributed more uniformly. The presence of gas cushion beneath the Crosser grid allows it to act as a pseudo gas distributor, eliminating gas channeling and decreasing zones of low fluidization quality. The rising bubbles are absorbed by the gas cushion and new small bubbles are generated above the Crosser grid, thereby strengthening the gas?solid contact. The guiding vanes of Crosser grid accelerate the lateral movement of particles. The Crosser grid also proves its stronger suppression on the axial back-mixing of solids.
KeywordFCC Regenerator Spent catalyst distribution Horizontal baffle MP-PIC simulation Hydrodynamics
DOI10.1016/j.cej.2021.128634
Language英语
Funding ProjectNational Natural Science Foundation of China[21276273] ; Science Foundation of China University of Petroleum, Beijing[2462015YQ0312] ; Science Foundation of China University of Petroleum, Beijing[C201606] ; National Key Research and Development Program[2018YFF01011400]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Science Foundation of China University of Petroleum, Beijing ; National Key Research and Development Program
WOS IDWOS:000637695900001
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48394
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Yongmin
Affiliation1.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
2.SINOPEC, Dalian Res Inst Petr & Petrochem, Dalian 116045, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yang, Zhijun,Zhang, Yongmin,Oloruntoba, Adefarati,et al. MP-PIC simulation of the effects of spent catalyst distribution and horizontal baffle in an industrial FCC regenerator. Part I: Effects on hydrodynamics[J]. CHEMICAL ENGINEERING JOURNAL,2021,412:16.
APA Yang, Zhijun,Zhang, Yongmin,Oloruntoba, Adefarati,&Yue, Junrong.(2021).MP-PIC simulation of the effects of spent catalyst distribution and horizontal baffle in an industrial FCC regenerator. Part I: Effects on hydrodynamics.CHEMICAL ENGINEERING JOURNAL,412,16.
MLA Yang, Zhijun,et al."MP-PIC simulation of the effects of spent catalyst distribution and horizontal baffle in an industrial FCC regenerator. Part I: Effects on hydrodynamics".CHEMICAL ENGINEERING JOURNAL 412(2021):16.
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