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Multifluid Modeling of Coal Pyrolysis in a Downer Reactor
Shu, Zhan1,2; Fan, Chuigang1; Li, Songgeng1; Wane, Junwu1
2016-03-09
发表期刊INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
卷号55期号:9页码:2634-2645
摘要

Downer is a promising reactor for coal pyrolysis, where the energy used for coal pyrolysis comes from the heat carrier particles. However, fundamental studies are limited regardless of its practical importance. To this end, a multifluid model is established to study the hydrodynamics, heat, mass transfer, and chemical reaction in a downer reactor: The conservation equations of mass, momentum, and energy are closed with proper models for interphase mass, momentum, and heat transfer, including the particle radiation mechanism and with advanced kinetic theory for particulate phase stresses and particle-particle drag coefficients. Species transport equations, the reaction kinetic model, and the water evaporation model are also coupled. Computational fluid dynamics simulations highlight the importance of feeding temperature in coal pyrolysis and indicate that the gas-solid heat transfer and particle radiation are the major heat transfer mechanisms, whereas the direct particle-particle heat transfer is negligible. The simulations prove qualitatively the rationality of the model for coal pyrolysis.

关键词Gas-solid Flow Fluidized-bed Reactors Biomass Fast Pyrolysis Chemical Looping Combustion Heat-transfer Countercurrent Downer Cfd-model Devolatilization Simulation Particles
文章类型Article
学科领域Engineering, Chemical ; Engineering
WOS标题词Science & Technology ; Technology
DOI10.1021/acs.iecr.5b04150
URL查看原文
收录类别SCI
语种英语
关键词[WOS]Gas-solid Flow ; Fluidized-bed Reactors ; Biomass Fast Pyrolysis ; Chemical Looping Combustion ; Heat-transfer ; Countercurrent Downer ; Cfd-model ; Devolatilization ; Simulation ; Particles
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(91334106 ; Ministry of Science and Technology of the People's Republic of China(2014CB744304
WOS记录号WOS:000371945300013
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/20687
专题研究所(批量导入)
通讯作者Wane, Junwu
作者单位1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Shu, Zhan,Fan, Chuigang,Li, Songgeng,et al. Multifluid Modeling of Coal Pyrolysis in a Downer Reactor[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2016,55(9):2634-2645.
APA Shu, Zhan,Fan, Chuigang,Li, Songgeng,&Wane, Junwu.(2016).Multifluid Modeling of Coal Pyrolysis in a Downer Reactor.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,55(9),2634-2645.
MLA Shu, Zhan,et al."Multifluid Modeling of Coal Pyrolysis in a Downer Reactor".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 55.9(2016):2634-2645.
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