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Multiscale analysis and modeling of multiphase chemical reactors
Alternative TitleAdv. Powder Technol.
Bi, HTT; Li, JH
2004
Source PublicationADVANCED POWDER TECHNOLOGY
ISSN0921-8831
Volume15Issue:6Pages:607-627
AbstractMultiphase gas-solids fluidized bed reactors are of multiscale structure, i.e. single particles, particle clusters/bubbles and reactor vessel. and of multiple physics, i.e. hydrodynamics, heat and mass transfer, and reaction kinetics. The formation of complex structures/patterns in each regime is a result of a compromise between dominant mechanisms at multiple scales. Coupling of hydrodynamics, heat and mass transfer, and reaction kinetics takes place at molecular and particle levels where conductive and convective transfer and diffusion within the internal pores of the catalyst are accompanied by the adsorption, surface reaction and desorption of reactant and product on the surface. This work first presents an overview of the general multiscale approaches, including the sequential approach, iterative/concurrent approach and the variational multiscale approach. applicable to multiphase flow and reaction systems, followed by a review, on multiscale modeling of gas-solids fluidized bed reactors including bubbling/turbulent and fast fluidized bed reactors. Finally, a multiscale circulating fluidized bed reactor model is outlined in which hydrodynamics are modeled by the combined energy-minimization multiscale/two-fluid computational fluid dynamics coupled with multiscale heat and mass transfer sub-models and reaction kinetics. The interaction and compromise among dominant mechanisms are represented by the variational criterion.; Multiphase gas-solids fluidized bed reactors are of multiscale structure, i.e. single particles, particle clusters/bubbles and reactor vessel. and of multiple physics, i.e. hydrodynamics, heat and mass transfer, and reaction kinetics. The formation of complex structures/patterns in each regime is a result of a compromise between dominant mechanisms at multiple scales. Coupling of hydrodynamics, heat and mass transfer, and reaction kinetics takes place at molecular and particle levels where conductive and convective transfer and diffusion within the internal pores of the catalyst are accompanied by the adsorption, surface reaction and desorption of reactant and product on the surface. This work first presents an overview of the general multiscale approaches, including the sequential approach, iterative/concurrent approach and the variational multiscale approach. applicable to multiphase flow and reaction systems, followed by a review, on multiscale modeling of gas-solids fluidized bed reactors including bubbling/turbulent and fast fluidized bed reactors. Finally, a multiscale circulating fluidized bed reactor model is outlined in which hydrodynamics are modeled by the combined energy-minimization multiscale/two-fluid computational fluid dynamics coupled with multiscale heat and mass transfer sub-models and reaction kinetics. The interaction and compromise among dominant mechanisms are represented by the variational criterion.
KeywordFluidized Bed Reactor Multiscale Modeling Energy-minimization Multiscale Reactor Model Compromise Variational Criterion
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
URL查看原文
Indexed ByISTP ; SCI
Language英语
WOS KeywordFLUIDIZED-BED REACTOR ; GAS-SOLID FLOW ; OLEFIN POLYMERIZATION ; MASS-TRANSFER ; COMPLEX-SYSTEMS ; CFD SIMULATION ; RISER REACTORS ; DECOMPOSITION ; DEPOSITION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000226454100003
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4964
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Multi Phase React Lab, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Bi, HTT,Li, JH. Multiscale analysis and modeling of multiphase chemical reactors[J]. ADVANCED POWDER TECHNOLOGY,2004,15(6):607-627.
APA Bi, HTT,&Li, JH.(2004).Multiscale analysis and modeling of multiphase chemical reactors.ADVANCED POWDER TECHNOLOGY,15(6),607-627.
MLA Bi, HTT,et al."Multiscale analysis and modeling of multiphase chemical reactors".ADVANCED POWDER TECHNOLOGY 15.6(2004):607-627.
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