Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets
	Liu, Juan 1,2; Li, Xiaocheng 3; Jia, Weihong 1; Li, Zhiyun 1,2; Zhao, Yapu4 ; Ren, Sili 1
刊名	ENERGY & FUELS
	2015-07-01
通讯作者邮箱	slren@licp.cas.cn
卷号	29 期号:7 页码:4644-4653
ISSN号	0887-0624
通讯作者	Ren, SL (reprint author), Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China.
产权排序	[Liu, Juan; Jia, Weihong; Li, Zhiyun; Ren, Sili] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China; [Liu, Juan; Li, Zhiyun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Xiaocheng] Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China; [Zhao, Yapu] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
中文摘要	Seeking highly efficient, rapid, universal, and low-cost demulsification materials to break up the crude/heavy oil-in-water emulsion and emulsified oily wastewater at ambient conditions has been the goal of the petroleum industry. In this work, an amphiphilic material, graphene oxide (GO) nanosheets, Was introduced as a versatile demulsifier to break up the oil-in-water emulsion at room temperature. It was encouraging to find that the small oil droplets in the emulsion quickly coalesced to form the oil phase and separated with the water within a few minutes. The demulsification tests indicated that the residual oil in separated water samples was as low as similar to 30 mg/L, corresponding to a demulsification efficiency over 99.9% at an optimum GO dosage. More importantly, GO not only is useful for ordinary crude oil emulsion but also can be used to break up the extra heavy oil emulsion. The effect of the emulsion pH on the demulsification was also investigated. It was interesting to find that the. distribution of GO either in oil or in water phase after demulsification was dependent on the pH value of the solution, which was attributed to the pH-dependent amphiphilicity of GO. The prominent demulsification ability of GO was attributed to the strong adsorption between the GO nanosheets and molecules of asphaltenes/resins driven by pi-pi interactions and/or n-pi interactions. The findings in this work indicate that the GO nanosheets are a simple, highly efficient, and universal demulsifier to separate the oil from the crude/heavy oil-in-water emulsions at ambient conditions, which shows a good application prospect in the oil industry.
英文摘要	Seeking highly efficient, rapid, universal, and low-cost demulsification materials to break up the crude/heavy oil-in-water emulsion and emulsified oily wastewater at ambient conditions has been the goal of the petroleum industry. In this work, an amphiphilic material, graphene oxide (GO) nanosheets, Was introduced as a versatile demulsifier to break up the oil-in-water emulsion at room temperature. It was encouraging to find that the small oil droplets in the emulsion quickly coalesced to form the oil phase and separated with the water within a few minutes. The demulsification tests indicated that the residual oil in separated water samples was as low as similar to 30 mg/L, corresponding to a demulsification efficiency over 99.9% at an optimum GO dosage. More importantly, GO not only is useful for ordinary crude oil emulsion but also can be used to break up the extra heavy oil emulsion. The effect of the emulsion pH on the demulsification was also investigated. It was interesting to find that the. distribution of GO either in oil or in water phase after demulsification was dependent on the pH value of the solution, which was attributed to the pH-dependent amphiphilicity of GO. The prominent demulsification ability of GO was attributed to the strong adsorption between the GO nanosheets and molecules of asphaltenes/resins driven by pi-pi interactions and/or n-pi interactions. The findings in this work indicate that the GO nanosheets are a simple, highly efficient, and universal demulsifier to separate the oil from the crude/heavy oil-in-water emulsions at ambient conditions, which shows a good application prospect in the oil industry.
分类号	二类/Q1
类目[WOS]	Energy & Fuels ; Engineering, Chemical
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	PI-PI INTERACTIONS ; WASTE-WATER ; HEAVY OIL ; BITUMEN EXTRACTION ; SPILL CLEANUP ; IONIC LIQUIDS ; STABILITY ; SANDS ; DESTABILIZATION ; PERFORMANCE
收录类别	SCI
原文出处	http://dx.doi.org/10.1021/acs.energyfuels.5b00966
语种	英语
WOS记录号	WOS:000360026900070
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/55779]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Juan,Li, Xiaocheng,Jia, Weihong,et al. Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets[J]. ENERGY & FUELS,2015,29(7):4644-4653.
APA	Liu, Juan,Li, Xiaocheng,Jia, Weihong,Li, Zhiyun,Zhao, Yapu,&Ren, Sili.(2015).Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets.ENERGY & FUELS,29(7),4644-4653.
MLA	Liu, Juan,et al."Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets".ENERGY & FUELS 29.7(2015):4644-4653.