Process diagnosis of coalescence separation of oil-in-water emulsions-two case studies

doi:10.1080/01932691.2018.1480384

	Process diagnosis of coalescence separation of oil-in-water emulsions-two case studies
	Hu, Dan 1,2; Zhang, Qian 1,3; Yang, Chuanfang 1; Wang, Xiaolin 2
刊名	JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
	2019-05-04
卷号	40 期号:5 页码:745-755
关键词	Coalescence theory fibrous materials mechanism oil-in-water emulsions surfactants
ISSN号	0193-2691
DOI	10.1080/01932691.2018.1480384
英文摘要	Coalescence 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] .
资助项目	National 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关键词	FIBROUS BED COALESCENCE ; SURFACTANT ; FIELDS
WOS研究方向	Chemistry
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000466072800012
资助机构	National Natural Science Foundation of China ; Major Science and Technology Program for Water Pollution Control and Treatment ; Chinese Academy of Sciences under the Talented Program
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/28210]
专题	中国科学院过程工程研究所
通讯作者	Yang, Chuanfang
作者单位	1.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
推荐引用方式 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.