Numerical comparison of two modes of gas-solid riser operation: Fluid catalytic cracking vs CFB combustor

doi:10.1016/j.partic.2016.05.007

	Numerical comparison of two modes of gas-solid riser operation: Fluid catalytic cracking vs CFB combustor
	Mei, Yifeng 1,4; Zhao, Mingzhao 1,2; Lu, Bona 1; Chen, Sheng 3; Wang, Wei 1,4
	2017-04-01
发表期刊	PARTICUOLOGY
ISSN	1674-2001
卷号	31 页码:42-48
摘要	Two modes of gas-solid riser operation, i.e., fluid catalytic cracking (FCC) and circulating fluidized bed combustor (CFBC), have been recognized in literature; particularly in the understanding of choking phenomena. This work compares these two modes of operation through computational fluid dynamics (CFD) simulation. In CFD simulations, the different operations are represented by fixing appropriate boundary conditions: solids flux or solids inventory. It is found that the FCC and CFBC modes generally have the same dependence of solids flux on the mean solids volume fraction or solids inventory. However, during the choking transition, the FCC mode of operation needs more time to reach a steady state; thus the FCC system may have insufficient time to respond to valve adjustments or flow state change, leading to the choking. The difference between FCC and CFBC systems is more pronounced for the systems with longer risers. A more detailed investigation of these two modes of riser operation may require a three-dimensional full loop simulation with dynamic valve adjustment. (C) 2016 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
关键词	Fluidization Computational Fluid Dynamics Simulation Fluid Catalytic Cracking Circulating Fluidized Bed Choking
文章类型	Article
WOS标题词	Science & Technology ; Technology
DOI	10.1016/j.partic.2016.05.007
收录类别	SCI
语种	英语
关键词[WOS]	MULTISCALE CFD ; FAST FLUIDIZATION ; BED BOILER ; FULL-LOOP ; FLOW ; SIMULATION ; CHOKING ; HYDRODYNAMICS ; SUSPENSIONS ; PARTICLES
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Chemical ; Materials Science, Multidisciplinary
项目资助者	National Natural Science Foundation of China(91334204 ; Chinese Academy of Sciences(XDA07080100) ; Ministry of Science and Technology of the People's Republic of China(2012CB215003) ; 21576263)
WOS记录号	WOS:000397695500006
引用统计
文献类型	期刊论文
条目标识符	http://ir.ipe.ac.cn/handle/122111/22149
专题	多相复杂系统国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Sichuan Univ, Sch Chem Engn, Chengdu 610065, Peoples R China 3.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Mei, Yifeng,Zhao, Mingzhao,Lu, Bona,et al. Numerical comparison of two modes of gas-solid riser operation: Fluid catalytic cracking vs CFB combustor[J]. PARTICUOLOGY,2017,31:42-48.
APA	Mei, Yifeng,Zhao, Mingzhao,Lu, Bona,Chen, Sheng,&Wang, Wei.(2017).Numerical comparison of two modes of gas-solid riser operation: Fluid catalytic cracking vs CFB combustor.PARTICUOLOGY,31,42-48.
MLA	Mei, Yifeng,et al."Numerical comparison of two modes of gas-solid riser operation: Fluid catalytic cracking vs CFB combustor".PARTICUOLOGY 31(2017):42-48.