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Self-agglomeration mechanism of iron nanoparticles in a fluidized bed
Li, Jun1; Kong, Jing1; He, Shengyi1,2; Zhu, Qingshan1,2; Li, Hongzhong1
2018-02-23
发表期刊CHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
卷号177页码:455-463
摘要Aided by self-agglomeration, a two-stage reduction process conducted at a higher temperature ( 600 degrees C) than the single-stage process resulted in an enhancement of the k constant to more than twice that of the single-stage process. A force balance model coupled with the reduction kinetics of Fe2O3 is first proposed to explain the self-agglomeration mechanism of iron nanoparticles (NPs) during the reduction. This force balance model successfully elucidates the reason for the prevention of defluidization via a two-stage fluidized bed method. At lower temperatures, there is a long stationary phase, which is of great importance in overcoming the sintering of agglomerates and in promoting the reduction reaction. At lower temperatures, the initial NPs first self-agglomerate into particles that are tens of microns in size; they then gradually agglomerate into larger particles (> 100 mu m) at higher temperatures. By contrast, the sudden growth of iron NP agglomerates causes sintering and defluidization in the single-stage fluidized bed method. (C) 2017 Elsevier Ltd. All rights reserved.
关键词Iron Nanoparticles Self-agglomeration Fluidized Bed Reactor Modeling Kinetics
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.ces.2017.11.038
收录类别SCI
语种英语
关键词[WOS]CHEMICAL LOOPING COMBUSTION ; X-RAY-DIFFRACTION ; COHESIVE PARTICLES ; HIGH-TEMPERATURE ; CARBON-MONOXIDE ; WS2 NANOPARTICLES ; GAS FLUIDIZATION ; VAPOR-DEPOSITION ; GROWTH-KINETICS ; PHASE-CHANGE
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(21325628 ; National Instrumentation Grant Program(2011YQ12003908) ; China Scholarship Council(201604910427) ; 91334108 ; U1462128)
WOS记录号WOS:000425918100039
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24021
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.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
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Li, Jun,Kong, Jing,He, Shengyi,et al. Self-agglomeration mechanism of iron nanoparticles in a fluidized bed[J]. CHEMICAL ENGINEERING SCIENCE,2018,177:455-463.
APA Li, Jun,Kong, Jing,He, Shengyi,Zhu, Qingshan,&Li, Hongzhong.(2018).Self-agglomeration mechanism of iron nanoparticles in a fluidized bed.CHEMICAL ENGINEERING SCIENCE,177,455-463.
MLA Li, Jun,et al."Self-agglomeration mechanism of iron nanoparticles in a fluidized bed".CHEMICAL ENGINEERING SCIENCE 177(2018):455-463.
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