Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets | |
Department | 固体润滑国家重点实验室 |
Liu J(刘娟)1,2; Li XC(李小成)3; Jia WH(贾卫红)1; Li ZY(李治云)1,2; Zhao, Yapu4; Ren SL(任嗣利)1; Ren SL(任嗣利) | |
The second department | 清洁能源化学与材料实验室;固体润滑国家重点实验室 |
2015 | |
Source Publication | Energy and Fuels |
ISSN | 0887-0624 |
Volume | 29Issue:7Pages:4644-4653 |
Abstract | 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 ∼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 π–π interactions and/or n−π 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. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1021/acs.energyfuels.5b00966 |
Indexed By | SCI |
If | 2.790 |
Language | 英语 |
Funding Project | 羰基金属功能材料课题组;新型电池材料研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/18581 |
Collection | 清洁能源化学与材料实验室 固体润滑国家重点实验室(LSL) 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Ren SL(任嗣利) |
Affiliation | 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 |
Recommended Citation GB/T 7714 | Liu J,Li XC,Jia WH,et al. Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets[J]. Energy and Fuels,2015,29(7):4644-4653. |
APA | Liu J.,Li XC.,Jia WH.,Li ZY.,Zhao, Yapu.,...&任嗣利.(2015).Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets.Energy and Fuels,29(7),4644-4653. |
MLA | Liu J,et al."Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets".Energy and Fuels 29.7(2015):4644-4653. |
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