Journal ArticleDOI
Reduction of Water/Oil Interfacial Tension by Model Asphaltenes: The Governing Role of Surface Concentration
TLDR
Investigation of the effect of asphaltene concentrations on the interfacial tension (IFT) of the oil/water interface revealed that surface concentration, rather than the commonly used bulk concentration, determines the reduction of oil/ water IFTs.Abstract:
In this work, pendant drop techniques and molecular dynamics (MD) simulations were employed to investigate the effect of asphaltene concentrations on the interfacial tension (IFT) of the oil/water interface. Here, oil and asphaltene were represented by, respectively, common organic solvents and Violanthrone-79, and two types of concentration, i.e., bulk concentration and surface concentration, were examined. Correlations between the IFTs from experiments and MD simulations revealed that surface concentration, rather than the commonly used bulk concentration, determines the reduction of oil/water IFTs. Through analyzing the hydrogen bonding, the underlying mechanism for the IFT reduction was proposed. Our discussions here not only enable the direct comparison between experiments and MD simulations on the IFTs but also help with future interfacial studies using combined experimental and simulation approaches. The methodologies used in this work can be extended to many other oil/water interfaces in the prese...read more
Citations
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Journal ArticleDOI
Stabilization mechanism and chemical demulsification of water-in-oil and oil-in-water emulsions in petroleum industry: A review
Duo Wang,Diling Yang,Charley Huang,Yueying Huang,Dingzheng Yang,Hao Zhang,Qi Liu,Tian Tang,Mohamed Gamal El-Din,Tom Kemppi,Basil Perdicakis,Hongbo Zeng +11 more
TL;DR: In this article, two types of demulsifiers are comprehensively reviewed and discussed, including types, influencing factors, demulsification mechanisms, and overdose effects of complex emulsions.
Journal ArticleDOI
Advances in Asphaltene Petroleomics. Part 4. Compositional Trends of Solubility Subfractions Reveal that Polyfunctional Oxygen-Containing Compounds Drive Asphaltene Chemistry
Martha L. Chacón-Patiño,Donald F. Smith,Christopher L. Hendrickson,Alan G. Marshall,Ryan P. Rodgers +4 more
TL;DR: In this article, asphaltene fractions enriched in single-core (island) or multicore motifs (archipelago) are separated according to their partitioning in n-heptane by two fractionation methods.
Journal ArticleDOI
A comprehensive understanding of co-solvent effects on interfacial polymerization : interaction with trimesoyl chloride
TL;DR: In this paper, the effect of co-solvent assisted interfacial polymerization (CAIP) on thin-film composite (TFC) reverse osmosis (RO) membranes was investigated.
Journal ArticleDOI
The first industrial fluid properties simulation challenge
Fiona Case,Anne M. Chaka,Daniel G. Friend,David J. Frurip,Joseph T. Golab,Russell D. Johnson,Jonathan Moore,Raymond D. Mountain,James D. Olson,Martin Schiller,Joey W. Storer +10 more
TL;DR: The Ninth Industrial Fluid Properties Simulation Challenge aimed to test the ability of molecular modeling approaches to predict water/oil interfacial tension (IFT) at conditions of high temperature and pressure and seven entries were received including approaches such as molecular dynamics and Monte Carlo simulations.
Journal ArticleDOI
Experimental investigation of stability of water in oil emulsions at reservoir conditions: Effect of ion type, ion concentration, and system pressure
TL;DR: In this paper, the HP-HT Emulsion Analyzer was used for monitoring the emulsification at various pressures and salinity to determine the role of affecting factors, including asphaltene and various ions in the aqueous phase.
References
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