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Multifluid Modeling of Mixing and Segregation of Binary Gas-Solid Flow in a Downer Reactor for Coal Pyrolysis
Alternative TitleInd. Eng. Chem. Res.
Shu, Zhan1,2; Wang, Junwu1; Fan, Chuigang1; Li, Songgeng1
2014-06-11
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume53Issue:23Pages:9915-9924
AbstractThe mixing and segregation characteristics of different types of solid particles in a downer reactor are of fundamental importance in the pyrolysis of low-rank coals where sand particles are used as the heat carrier. However, relevant fundamental studies are seldom reported. This work presents a computational investigation of the hydrodynamic behavior of binary gas-solid flows in a downer using an Eulerian-Eulerian method with a modified gas-solid drag force model, taking the effect of mesoscale particle clustering structures into consideration. Three-dimensional CFD simulations were carried out and the results obtained were compared with the experimental data available in literature. It was shown that a reasonable agreement with experimental data can be obtained with the proposed drag modification. The segregation/mixing behavior in the downer was then analyzed with two popular methods, which results in the conclusion that the solid particles in the downer reactor can mix reasonably well, therefore offering theoretical support to the idea of coal pyrolysis using sand particles as the heat carrier.; The mixing and segregation characteristics of different types of solid particles in a downer reactor are of fundamental importance in the pyrolysis of low-rank coals where sand particles are used as the heat carrier. However, relevant fundamental studies are seldom reported. This work presents a computational investigation of the hydrodynamic behavior of binary gas-solid flows in a downer using an Eulerian-Eulerian method with a modified gas-solid drag force model, taking the effect of mesoscale particle clustering structures into consideration. Three-dimensional CFD simulations were carried out and the results obtained were compared with the experimental data available in literature. It was shown that a reasonable agreement with experimental data can be obtained with the proposed drag modification. The segregation/mixing behavior in the downer was then analyzed with two popular methods, which results in the conclusion that the solid particles in the downer reactor can mix reasonably well, therefore offering theoretical support to the idea of coal pyrolysis using sand particles as the heat carrier.
KeywordCirculating Fluidized-bed Particle Heat-transfer Countercurrent Downer Numerical-simulation Eulerian Simulation Discrete Element Cfd Simulation Hydrodynamics Behavior Emms
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie500568d
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BED ; PARTICLE HEAT-TRANSFER ; COUNTERCURRENT DOWNER ; NUMERICAL-SIMULATION ; EULERIAN SIMULATION ; DISCRETE ELEMENT ; CFD SIMULATION ; HYDRODYNAMICS ; BEHAVIOR ; EMMS
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000337337000042
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10957
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100490, Peoples R China
Recommended Citation
GB/T 7714
Shu, Zhan,Wang, Junwu,Fan, Chuigang,et al. Multifluid Modeling of Mixing and Segregation of Binary Gas-Solid Flow in a Downer Reactor for Coal Pyrolysis[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(23):9915-9924.
APA Shu, Zhan,Wang, Junwu,Fan, Chuigang,&Li, Songgeng.(2014).Multifluid Modeling of Mixing and Segregation of Binary Gas-Solid Flow in a Downer Reactor for Coal Pyrolysis.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(23),9915-9924.
MLA Shu, Zhan,et al."Multifluid Modeling of Mixing and Segregation of Binary Gas-Solid Flow in a Downer Reactor for Coal Pyrolysis".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.23(2014):9915-9924.
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