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Numerical study of flow maldistribution and depressurization strategies in a small-scale axial adsorber
Alternative TitleAdsorpt.-J. Int. Adsorpt. Soc.
Liu, Yingshu1; Zheng, Xingang1,2; Dai, Ruifeng3
2014-08-01
Source PublicationADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
ISSN0929-5607
Volume20Issue:5-6Pages:757-768
AbstractFlow maldistribution and local high velocity in an axial adsorber is numerically studied to investigate the potential occurrence of sorbent pulverization and uneven utility. A considerable maldistribution induced by the entrance effect and local high velocity caused by rapid gas discharge during depressurization is observed. Three types of gas distributors and different depressurization strategies are then proposed and studied to determine their capabilities to create uniform velocity profiles. Results show that locating the predistributor in the dead zone is critical to flow distribution. The maldistribution factor (Mf) can decrease to a minimum of 0.055 when a perforated inlet plenum is used with a conventional distributor. In addition, the internal ring can effectively reduce wall effects. Moreover, both gas expansion and desorption have a significant influence on the evolution of local velocity during depressurization. In this step, local high velocity can possibly exceed incipient fluidization velocity and cause attrition and pulverization of the sorbent. To a certain extent, employing methods to control the depressurization rate is necessary. Applying linear depressurization () or downward convex conic depressurization () can reduce local high velocity, and thus, improve flow conditions.; Flow maldistribution and local high velocity in an axial adsorber is numerically studied to investigate the potential occurrence of sorbent pulverization and uneven utility. A considerable maldistribution induced by the entrance effect and local high velocity caused by rapid gas discharge during depressurization is observed. Three types of gas distributors and different depressurization strategies are then proposed and studied to determine their capabilities to create uniform velocity profiles. Results show that locating the predistributor in the dead zone is critical to flow distribution. The maldistribution factor (Mf) can decrease to a minimum of 0.055 when a perforated inlet plenum is used with a conventional distributor. In addition, the internal ring can effectively reduce wall effects. Moreover, both gas expansion and desorption have a significant influence on the evolution of local velocity during depressurization. In this step, local high velocity can possibly exceed incipient fluidization velocity and cause attrition and pulverization of the sorbent. To a certain extent, employing methods to control the depressurization rate is necessary. Applying linear depressurization () or downward convex conic depressurization () can reduce local high velocity, and thus, improve flow conditions.
KeywordMathematical Modeling Adsorption Packed Bed Transport Processes Flow Maldistribution Distributor
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1007/s10450-014-9619-7
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPACKED-BED ; ADSORPTION ; COLUMNS
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Chemical
WOS IDWOS:000339103300010
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10944
Collection研究所(批量导入)
Affiliation1.Univ Sci & Technol, Sch Mech Engn, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing, Peoples R China
3.China ENFI Engn Corp, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Liu, Yingshu,Zheng, Xingang,Dai, Ruifeng. Numerical study of flow maldistribution and depressurization strategies in a small-scale axial adsorber[J]. ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY,2014,20(5-6):757-768.
APA Liu, Yingshu,Zheng, Xingang,&Dai, Ruifeng.(2014).Numerical study of flow maldistribution and depressurization strategies in a small-scale axial adsorber.ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY,20(5-6),757-768.
MLA Liu, Yingshu,et al."Numerical study of flow maldistribution and depressurization strategies in a small-scale axial adsorber".ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY 20.5-6(2014):757-768.
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