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Numerical comparison of two modes of gas-solid riser operation: Fluid catalytic cracking vs CFB combustor
Mei, Yifeng1,4; Zhao, Mingzhao1,2; Lu, Bona1; Chen, Sheng3; Wang, Wei1,4
Source PublicationPARTICUOLOGY

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.

KeywordFluidization Computational Fluid Dynamics Simulation Fluid Catalytic Cracking Circulating Fluidized Bed Choking
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordMultiscale Cfd ; Fast Fluidization ; Bed Boiler ; Full-loop ; Flow ; Simulation ; Choking ; Hydrodynamics ; Suspensions ; Particles
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
Funding OrganizationNational 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 IDWOS:000397695500006
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
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.
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