MP-PIC simulation of the effects of spent catalyst distribution and horizontal baffle in an industrial FCC regenerator. Part I: Effects on hydrodynamics

doi:10.1016/j.cej.2021.128634

	MP-PIC simulation of the effects of spent catalyst distribution and horizontal baffle in an industrial FCC regenerator. Part I: Effects on hydrodynamics
	Yang, Zhijun 2,3; Zhang, Yongmin 2; Oloruntoba, Adefarati 2; Yue, Junrong 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2021-05-15
卷号	412 页码:16
关键词	FCC Regenerator Spent catalyst distribution Horizontal baffle MP-PIC simulation Hydrodynamics
ISSN号	1385-8947
DOI	10.1016/j.cej.2021.128634
英文摘要	Improving 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.
资助项目	National 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研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000637695900001
资助机构	National Natural Science Foundation of China ; Science Foundation of China University of Petroleum, Beijing ; National Key Research and Development Program
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/48393]
专题	中国科学院过程工程研究所
通讯作者	Zhang, Yongmin
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China 3.SINOPEC, Dalian Res Inst Petr & Petrochem, Dalian 116045, Peoples R China
推荐引用方式 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.