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The influence of surface hydrophobicity in fluidization of ultrafine Al2O3 particles
Chen, Yang1,2
2016-12-01
Source PublicationCHEMICAL ENGINEERING AND PROCESSING
ISSN0255-2701
Volume110Issue:DECPages:21-29
Abstract

A new approach is hereby presented to study the influence of surface properties on ultrafine alumina (Al2O3) particles towards a fluidized performance by changing the ultrafine particles (Al2O3) surface hydrophobic degree. A number of variables that affects fluidization performance of ultrafine particles (Al2O3), including hydrophobicity has been studied. The minimum full fluidization velocities (U-mff), average bed pressure drop (Delta P-a), standard deviation in pressure drop (sigma(p)) and so on, has been found to depend on the hydrophobic degree, which is a function of the ultrafine particles (Al2O3) surface properties. After treatment of the ultrafine particles (Al2O3) with a surfactant, the liquid-solid contact angle on the ultrafine particles (Al2O3) raises, thus changing the interaction between the ultrafine particles (Al2O3) and also between the ultrafine particles (Al2O3) with the micro-fluidized bed wall surface. Furthermore, some changes in important parameters such as particle size (simple agglomerate size), bulk density, flow function plots, maximum wall friction angle, BET parameters and so on were also evaluated. The fluidization of ultrafine particles is attractive, if the interaction forces between the ultrafine particles (Al2O3) and also between the ultrafine particles (Al2O3) with the micro-fluidized bed wall surface can be artificially controlled. Moreover, it is possible to achieve a better fluidization performance on the ultrafine particles (Al2O3). However, more investigation is required to improve the fluidization performance of the ultrafine particles. (C) 2016 Elsevier B.V. All rights reserved.

KeywordUltrafine Al2o3 Particles Fluidization Agglomerate Hydrophobicity Interaction Forces
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cep.2016.09.011
Indexed BySCI
Language英语
WOS KeywordINTERPARTICLE FORCES ; POWDERS ; FINE ; NANOPARTICLES ; BEHAVIOR ; SILICA
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21325628)
WOS IDWOS:000389099700003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21822
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
2.MEP, Solid Waste & Chem Management Ctr, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Chen, Yang. The influence of surface hydrophobicity in fluidization of ultrafine Al2O3 particles[J]. CHEMICAL ENGINEERING AND PROCESSING,2016,110(DEC):21-29.
APA Chen, Yang.(2016).The influence of surface hydrophobicity in fluidization of ultrafine Al2O3 particles.CHEMICAL ENGINEERING AND PROCESSING,110(DEC),21-29.
MLA Chen, Yang."The influence of surface hydrophobicity in fluidization of ultrafine Al2O3 particles".CHEMICAL ENGINEERING AND PROCESSING 110.DEC(2016):21-29.
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