CAS OpenIR
Conditioning micro fluidized bed for maximal approach of gas plug flow
Geng, Sulong1,2; Han, Zhennan3; Yue, Junrong1; Li, Yunjia1,2; Zeng, Xi1; Lai, Dengguo1,2; Yu, Jian1; Xu, Guangwen1,3
2018-11-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume351Pages:110-118
AbstractWe have for the first time investigated the gas-solid fluidization behavior in size-reduced beds called micro fluidized bed (Liu. X et al. Chem. Eng. J., 2008, 137: 302-307), but up to now there is not yet any clear definition for the micro fluidized beds (MFBs). This study intends to characterize MFBs in terms of gas back-mixing. The residence time distribution (RTD) and extent of back-mixing of gas were investigated in beds with inner diameters of up to 21 mm for particles of FCC, glass beads and silica sand. The RTD curves of gas, shown as E(t) versus time t, in such beds were determined on the basis of axial dispersion model to obtain the mean residence time (t) over bar, variance sigma(2)(t) and peak height of a given E(t) curve. In terms of these parameters the degree of gas backmixing and its variation were evaluated with respect to particles, bed diameter (D), superficial gas velocity (U-g) and static particle bed height (H-g). It was found that the RTD of gas is subject to a unique correlation between the height of E(t) peak and the variance sigma(2)(t), which makes it clear that the gas flow in an MFB has limited gas dispersion and is highly approaching to a plug flow if sigma(2)(t) is below 0.25 or the height of E(t) peak is larger than 1.0. This refers to the feature that is most desired for an MFB and can thus be the criterion for defining MFB.
KeywordMicro fluidized bed Residence time distribution Axial dispersion model Gas back-mixing Plug flow
DOI10.1016/j.cej.2018.06.076
Language英语
WOS KeywordRESIDENCE-TIME DISTRIBUTION ; AXIAL-DISPERSION ; BUBBLE BEHAVIOR ; HEAT-TRANSFER ; MASS-TRANSFER ; CFD-DEM ; REACTOR ; PHASE ; PARTICLES ; EXPANSION
Funding ProjectNational Basic Research Program of China[2014CB744303] ; National Natural Science Foundation of China[91534125]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Basic Research Program of China ; National Natural Science Foundation of China
WOS IDWOS:000444000000013
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/25943
Collection中国科学院过程工程研究所
Corresponding AuthorYu, Jian; Xu, Guangwen
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Geng, Sulong,Han, Zhennan,Yue, Junrong,et al. Conditioning micro fluidized bed for maximal approach of gas plug flow[J]. CHEMICAL ENGINEERING JOURNAL,2018,351:110-118.
APA Geng, Sulong.,Han, Zhennan.,Yue, Junrong.,Li, Yunjia.,Zeng, Xi.,...&Xu, Guangwen.(2018).Conditioning micro fluidized bed for maximal approach of gas plug flow.CHEMICAL ENGINEERING JOURNAL,351,110-118.
MLA Geng, Sulong,et al."Conditioning micro fluidized bed for maximal approach of gas plug flow".CHEMICAL ENGINEERING JOURNAL 351(2018):110-118.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Geng, Sulong]'s Articles
[Han, Zhennan]'s Articles
[Yue, Junrong]'s Articles
Baidu academic
Similar articles in Baidu academic
[Geng, Sulong]'s Articles
[Han, Zhennan]'s Articles
[Yue, Junrong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Geng, Sulong]'s Articles
[Han, Zhennan]'s Articles
[Yue, Junrong]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.