Destabilisation of Water-in-Crude Oil Emulsions by Silicone Copolymer Demulsifiers

Daniel‐David, Delphine; Follotec, Amandine Le; Pezron, Isabelle; Dalmazzone, Christine; Noı̈k, Christine; Barré, Loı̈c; Komunjer, L.

doi:10.2516/ogst:2008002

Cited by 49 publications

(36 citation statements)

References 35 publications

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“…Daniel-David et al [138] employed several techniques to identify the destabilization mechanism of W/O emulsions using polysiloxane copolymers. Eventually, they proposed a two-step mechanism as follows:…”

Section: Nonionic Demulsifiersmentioning

confidence: 99%

Demulsification techniques of water-in-oil and oil-in-water emulsions in petroleum industry

Zolfaghari

Fakhru’l‐Razi

Abdullah

et al. 2016

Separation and Purification Technology

552

255

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The difficulties associated with transportation and refining of crude oil emulsions as well as produced water discharge limitations are among the conspicuous clues that have led the oilfield researchers to probe into practical demulsification methods for many decades.Inconsistent research outcomes observed in the literature for a particular demulsification method of a typical emulsion (i.e., water-in-oil or oil-in-water) arise not only from the varied influential parameters associated (such as salinity, temperature, pH, dispersed phase content, emulsifier/demulsifier concentration, droplet size, etc.), but also from the diverse types of emulsion constituents (namely oil, surfactant, salt, alkali, polymer, fine solids, and/or other chemicals/impurities). Being the main component in formation of stabilizing interfacial film surrounding the dispersed phase droplets, surfactant is the most predominant contributor to emulsion stability, extent of which depends on its nature (being ionic or nonionic, and its degree of hydrophilicity/lipophilicity), concentration and interaction with other surface-active agents in the emulsion, as well as on the salinity, temperature, and pH of the system. In this paper, it is endeavored to overview some of the most commonly exploited demulsification techniques (i.e., chemical, biological, membrane, electrical, and microwave irradiation) on both the oilfield and synthetic emulsions, taking into account the emulsion-stabilizing anddestabilizing effects with regard to the dominant parameters plus the emulsion composition.Further, the variations occurring in interfacial properties of emulsions by demulsification process are discussed. Finally, the mechanism(s) involved in emulsions resolution achieved by each method is elucidated. Clearly, the most efficient demulsification approach is the one able to attain desirable separation efficiency while complying with the environmental regulations and imposing the least economic burden on the petroleum industry.

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Section: Nonionic Demulsifiersmentioning

confidence: 99%

Demulsification techniques of water-in-oil and oil-in-water emulsions in petroleum industry

Zolfaghari

Fakhru’l‐Razi

Abdullah

et al. 2016

Separation and Purification Technology

552

255

View full text Add to dashboard Cite

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“…High efficiency demulsification of oil-water emulsions through various strategies is therefore of significant importance for petroleum industry. Till now, the demulsification of W/O emulsions has been considerably investigated and can be successfully realized by adding several types of chemical demulsifiers such as PAMAM-polyether [5], ethylene oxide/propylene oxide block copolymer [6], silicone surfactant [7], ethylcellulose polymer [8], alkoxylated alkyl phenol formaldehyde resin [9], and ionic liquid [10]. In contrast, the O/W emulsion has been one of worldwide challenges because of its increasing production from the oilfields and the serious contaminations resulted from oily wastewater [11].…”

Section: Introductionmentioning

confidence: 99%

Recyclable magnetic graphene oxide for rapid and efficient demulsification of crude oil-in-water emulsion

Liu

Wang

et al. 2017

Fuel

139

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h i g h l i g h t sThe M-GO was a high efficiency demulsifier which could be reused for 6-7 times. The non-covalent interaction analysis proved that p-p and r-p interactions between GO materials and asphaltene molecules are the major driven forces for demulsification. Graphene oxide (GO) nanosheets have been experimentally proved to be a highly efficiency, rapid and universal demulsifier to break up the crude oil-in-water emulsion and/or the emulsified oily waste water in our previous study. To recycle the GO nanosheets and avoid the possible contamination of GO for crude oil, in this work, the magnetic graphene oxide (M-GO) was successfully synthesized and used for separating oil/water emulsions. Demulsification tests indicated that M-GO could separate the oil/water emulsions within a few minutes and recycle 6-7 times without losing its demulsification capability. The residual oil content in the separated water was as low as $10 mg/L, corresponding to a demulsification efficiency of 99.98% at an optimal dosage. Quantum chemical calculation results indicated that the p-p/r-p interactions between GO materials and asphaltene molecules are the major driven forces for the high demulsification performance of M-GO nanosheets. This work not only provides a promising demulsifies to demulsify the crude oil-in-water emulsion or the oily wastewater but also give a deep understanding on the intrinsic interaction between demulsifiers and asphaltenes.

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“…The chemical method entails the addition of demulsifiers to crude oil emulsions, and it is one of the most common methods of demulsification [28]. The main function of the chemical additives used for demulsification is to destabilize the emulsifying agents [5]. A demulsifier is a surface-active compound [96], so upon its addition to an emulsion, the demulsifier migrates to the oil-water interface and breaks the rigid film, resulting in the coalescence of water droplets [21].…”

Section: Chemical Demulsificationmentioning

confidence: 99%

“…One major challenge often encountered during the production and transportation of crude oil in petroleum industries is the formation of complex and extremely stable emulsions with saline water [1][2][3][4]. These emulsions are droplets of water or brine dispersed in a continuous phase of crude oil: hence, they are known as water-in-oil (W/O) emulsions [5]. The emulsions encountered during crude oil production are complex in nature, and they can be grouped into water-in-oil (W/O), oil-in-water (O/W), and water-in-oil-in-water (W/O/W) emulsions [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Amongst these techniques, chemical demulsification has been the most widely applied and reported in the literature, which involves the addition of demulsifier to crude oil emulsions [26][27][28]. The main function of the chemical additives is to destabilize the emulsifying agents [5]. Demulsification by mechanical means entails the disruption of physical barriers or the application of density variation between the water and the oil phases for demulsification processes [29,30].…”

Section: Introductionmentioning

confidence: 99%

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An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

et al. 2019

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The processing of crude oil often requires the extraction of a large amount of water. Frequently, crude oil is mixed with water to form water-in-crude oil emulsions as the result of factors such as high shear at the production wellhead and surface-active substances that are naturally present in crude oil. These emulsions are undesirable and require demulsification to remove the dispersed water and associated inorganic salts in order to meet production and transportation specifications. Additionally, the demulsification of these crude oil emulsions mitigates corrosion and catalyst poisoning and invariably maximizes the overall profitability of crude oil production. Recently, there has been growing research interest in developing workable solutions to the difficulties associated with transporting and refining crude oil emulsions and the restrictions on produced water discharge. Therefore, this paper reviews the recent research efforts on state-of-the-art demulsification techniques. First, an overview of crude oil emulsion types, formation, and stability is presented. Then, the parameters and mechanisms of emulsification formation and different demulsification techniques are extensively examined. It is worth noting that the efficiency of each of these techniques is dependent on the operating parameters and their interplay. Moreover, a more effective demulsification process could be attained by leveraging synergistic effects by combining one or more of these techniques. Finally, this literature review then culminates with propositions for future research. Therefore, the findings of this study can help for a better understanding of the formation and mechanisms of the various demulsification methods of crude oil to work on the development of green demulsifiers by different sources.

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Destabilisation of Water-in-Crude Oil Emulsions by Silicone Copolymer Demulsifiers

Cited by 49 publications

References 35 publications

Demulsification techniques of water-in-oil and oil-in-water emulsions in petroleum industry

Demulsification techniques of water-in-oil and oil-in-water emulsions in petroleum industry

Recyclable magnetic graphene oxide for rapid and efficient demulsification of crude oil-in-water emulsion

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

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