Journal Article•
Application of Scheludko–Exerowa thin liquid film technique to studies of petroleum W/O emulsions A Physicochemical and engineering aspects
TL;DR: In this article, a modification of TLF-PBT cell allows probing water-in-oil emulsion films with electrical signal, a new technique to study water inoil emulsions.
About: This article is published in Colloids and Surfaces.The article was published on 2017-01-01 and is currently open access. It has received 1 citations till now. The article focuses on the topics: Emulsion.
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DOI•
01 Jan 2018
TL;DR: In this article, the authors present a Table of Table of Contents ( Table of contents) of the paper this article and present the table of contents of the conference proceedings of this paper.
Abstract: ........................................................................................................................................ iii Lay Summary ............................................................................................................................... iv Preface .............................................................................................................................................v Table of
2 citations
References
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1,263 citations
15 May 1997
TL;DR: In this article, the authors developed a molecular model in which they proposed that the integrity of these films and thus their ability to stabilize water-in-crude-oil emulsions are sensitive to a variety of crude solvency parameters, such as aromaticity, resin-to-asphaltene ratio, and polar functional group concentration.
Abstract: The formation of stable and persistent emulsions and foams in the production and refining of crude petroleum is a challenge which has defied broad and generic resolution for several decades. Rational and systematic approaches to demulsification have been slow to develop due to a lack of fundamental understanding of the molecular origins of emulsion stabilization and the full range of factors which govern emulsion stability. Several studies have shown the importance of resins and asphaltenes, which have the ability to organize and form rigid films at the oil/water interface. We have developed a molecular model in which we propose that the integrity of these films and thus their ability to stabilize water-in-crude-oil emulsions are sensitive to a variety of crude solvency parameters, such as aromaticity, resin-to-asphaltene ratio, and polar functional group concentration. This model was tested by correlating the stability of emulsions formed from a variety of crude oils—Arab Berri (Extra Light), Arab Heavy, Alaska North Slope, and San Joaquin Valley—in which the resin and asphaltene contents vary, as well as their specific characteristics. The results of the elemental and functional group characterization of these crudes and their fractions and the techniques utilized to obtain them were presented previously. Detailed quantitative protocols for gauging relative emulsion stability have been developed to further evaluate the proposed model by blending solvents of varying aromaticity and by doping isolated resins from different crudes into solvent-modified crudes. Dramatic destabilization of emulsions was accomplished by modifying the crude solvency in either fashion. Simple physical and chemical techniques for minimizing emulsion formation such as basic crude blending and solvent-recycle schemes will also be discussed.
540 citations
TL;DR: In this paper, a review of the current understanding of electrocoalescence of water droplets in oil is presented, highlighting particularly the mechanisms proposed for droplet-droplet and droplet interface coalescence under the influence of an applied electrostatic field, as well as various factors influencing the electrocoscence phenomenon.
387 citations
TL;DR: The components of petroleum asphaltenes exhibit complex bridged structures comprising sulfur, nitrogen, aromatic, and naphthenic groups linked by alkyl chains as discussed by the authors, and these components aggregate in crude oil.
Abstract: The components of petroleum asphaltenes exhibit complex bridged structures comprising sulfur, nitrogen, aromatic, and naphthenic groups linked by alkyl chains. These components aggregate in crude o...
379 citations
TL;DR: The results of this study strongly supports the theory that asphaltenes are the most effective in stabilizing emulsions when they are near the point of incipient precipitation and points to the significance of the solubility state of the asphaltones in determining the emulsifying potential of these crude oils.
374 citations