Role of dodecane on coal particle-bubble interaction in aqueous phase

doi:10.1016/j.molliq.2020.114175

GIEC OpenIR

	Role of dodecane on coal particle-bubble interaction in aqueous phase
	Zhang, Zhiqiang 1; Wu, Congshan 1; Yan, Kefeng2,3
	2020-12-01
发表期刊	JOURNAL OF MOLECULAR LIQUIDS
ISSN	0167-7322
卷号	319 页码:7
通讯作者	Zhang, Zhiqiang(donaldzhang@foxmail.com)
摘要	Even if coal particles are hydrophobic, interaction between these particles and air bubbles can be enhanced by non polar oil in froth flotation. The role of a nonpolar liquid dodecane on coal partide-bubble interaction in aqueous phase was investigated and compared to that of a solid analogue, paraffin wax via a combined application of water contact angle and particle-bubble stability measurements, and molecular dynamics simulations. It was found both dodecane and paraffin wax can increase hydrophobicity of coal surface and attachment stability of coal particle-bubble aggregates when they covered the coal partides. Despite similar chemical structure and hydrophobicity, dodecane was more effective than paraffin wax. Molecular simulations confirmed that, comparing to the unmodified coal particle, both dodecane and paraffin wax models could increase the attachment strength of coal particle. However, different from immobile solid paraffin wax, we demonstrated that the liquid like properties of the dodecane layers present on the coal particle surfaces play an essential role in the particle-bubble interaction. When the coal particle covered by dodecane arrived at gas-water interface, the dodecane molecules will migrate and rearrange to form a new film at this interface. In addition to hydrophobic attraction of the gas bubble, the dodecane film will provide additional adhesion towards the coal particle due to oleophilicity of the coal particle, enhancing the stability of bubble-particle aggregate. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Nonpolar hydrocarbon Hydrophobicity Bubble-particle aggregate Liquidlike properties
DOI	10.1016/j.molliq.2020.114175
关键词[WOS]	HYDROPHOBIC SURFACES ; AIR BUBBLES ; FLOTATION ; SEPARATION ; ATTACHMENT ; COLLECTOR ; FILMS ; OILS
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51404162] ; National Natural Science Foundation of China[51974195]
WOS研究方向	Chemistry ; Physics
项目资助者	National Natural Science Foundation of China
WOS类目	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000583948500049
出版者	ELSEVIER
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/34826
专题	中国科学院广州能源研究所
通讯作者	Zhang, Zhiqiang
作者单位	1.Taiyuan Univ Technol, Coll Min Engn, 79 West Yingze St, Taiyuan 030024, Shanxi, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 3.Guangzhou Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhiqiang,Wu, Congshan,Yan, Kefeng. Role of dodecane on coal particle-bubble interaction in aqueous phase[J]. JOURNAL OF MOLECULAR LIQUIDS,2020,319:7.
APA	Zhang, Zhiqiang,Wu, Congshan,&Yan, Kefeng.(2020).Role of dodecane on coal particle-bubble interaction in aqueous phase.JOURNAL OF MOLECULAR LIQUIDS,319,7.
MLA	Zhang, Zhiqiang,et al."Role of dodecane on coal particle-bubble interaction in aqueous phase".JOURNAL OF MOLECULAR LIQUIDS 319(2020):7.