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Process diagnosis of coalescence separation of oil-in-water emulsions-two case studies
Hu, Dan1,2; Zhang, Qian1,3; Yang, Chuanfang1; Wang, Xiaolin2
2019-05-04
Source PublicationJOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
ISSN0193-2691
Volume40Issue:5Pages:745-755
AbstractCoalescence separation is a widely applied technology for oil/water emulsion separation. In this paper, we first review the existing coalescence theories regarding droplet capture, attachment and release. Two case studies are considered, dealing with the separation of oil-in-water emulsions using our recently developed coalescing filters. The first case (Case I) is associated with the separation of surfactant-stabilized hexadecane/water emulsions. The second case (Case II) addresses the separation of sulfonated kerosene/water emulsions in a continuous bench operation. In Case I, known wetting and collision theories were applied to understand the complex coalescence process occurring on the surface of the fibers. For this, the detrimental effect of surfactants on coalescence separation was taken into account. It was found that the best oil wetting coalescing material under water was not the most desired for coalescence, contradicting the existing theory. In addition, once the materials were pre-saturated with surfactant-containing emulsions, the oil wetting was enhanced significantly. However, the separation efficiency was maintained at the same level, unless the material adsorbed surfactant, resulting in minor reductions in the wetting angle. In Case II, based on the fiber properties and operation conditions, the droplet capture efficiency and released droplet size were calculated using the existing models. Fiber diameter and medium face velocity were found to affect not only the capture, but also drop release. Based on model predictions, the dominant capture mechanism was identified as interception followed by van der Waals forces. Overall, this work offers insights about the influencing parameters on oil/water emulsion separation for better designing coalescence systems. [GRAPHICS] .
KeywordCoalescence theory fibrous materials mechanism oil-in-water emulsions surfactants
DOI10.1080/01932691.2018.1480384
Language英语
WOS KeywordFIBROUS BED COALESCENCE ; SURFACTANT ; FIELDS
Funding ProjectNational Natural Science Foundation of China[21476237] ; National Natural Science Foundation of China[21401201] ; Major Science and Technology Program for Water Pollution Control and Treatment[2015ZX07202-013] ; Chinese Academy of Sciences under the Talented Program
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Natural Science Foundation of China ; Major Science and Technology Program for Water Pollution Control and Treatment ; Chinese Academy of Sciences under the Talented Program
WOS IDWOS:000466072800012
PublisherTAYLOR & FRANCIS INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28210
Collection中国科学院过程工程研究所
Corresponding AuthorYang, Chuanfang
Affiliation1.Chinese Acad Sci, CAS Key Lab Green Proc & Engn, Inst Proc Engn, Beijing, Peoples R China
2.Tsinghua Univ, Beijing Key Lab Membrane Mat & Engn, Dept Chem Engn, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Hu, Dan,Zhang, Qian,Yang, Chuanfang,et al. Process diagnosis of coalescence separation of oil-in-water emulsions-two case studies[J]. JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY,2019,40(5):745-755.
APA Hu, Dan,Zhang, Qian,Yang, Chuanfang,&Wang, Xiaolin.(2019).Process diagnosis of coalescence separation of oil-in-water emulsions-two case studies.JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY,40(5),745-755.
MLA Hu, Dan,et al."Process diagnosis of coalescence separation of oil-in-water emulsions-two case studies".JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY 40.5(2019):745-755.
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