Systematic Study of Heavy Oil Emulsion Properties Optimized with a New Chemical Formulation Approach: Particle Size Distribution

Nizamidin, Nabijan; Weerasooriya, Upali; Pope, Gary A.

doi:10.1021/acs.energyfuels.5b01818

Cited by 18 publications

(5 citation statements)

References 55 publications

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“…Film elasticity is closely related to oil emulsion stability and rheology. ,− Highly elastic films are supposed to act as a barrier that avoids droplet coalescence and promotes emulsion stability.…”

Section: Results and Discussionmentioning

confidence: 99%

Effects of pH and Temperature on the Phase Behavior and Properties of Asphaltene Liquid Films

Kabbach

Santos

2017

Energy Fuels

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Crude oil asphaltenes represent a solubility fraction of petroleum that includes the most polar and most interface-active compounds. Asphaltenes have been involved in solid deposition phenomena in oilfield operations and have produced impractical conditions for oil flow in pipelines and reservoir porous rock. In addition, asphaltenes contribute to the formation of both oil-in-water and water-in-oil emulsions. Therefore, the properties of asphaltene interfacial films are crucial to defining the stabilization or breaking of crude oil emulsions. In this work, the results are presented as a contribution to understanding the elasticity and phase behavior of asphaltene liquid films with changes in subphase pH and temperature. n-Pentane-insoluble asphaltenes (C5I) were extracted from a light crude oil and deposited at the air–water interface from a dichloromethane spreading solution to form two-dimensional monolayers. The C5I films were evaluated using a Langmuir trough under compression at a constant rate. Surface pressure–area and surface potential–area isotherms were interpreted from a mathematic model of the surface pressure. The C5I monolayers displayed an extensive region containing liquid-expanded (LE) and liquid-condensed (LC) phases and a well-identified transition region between these phases. The compressibility of LE films (0.01–0.02 m mN–1) was approximately 5-fold lower than the compressibility of LC films (0.05–0.07 m mN–1). The mixed film compressibility was between the LE and LC film compressibilities. At 10 °C, more compressed films were obtained at pH 4. At 30 °C, more compressed films were found at pH 8. Surface pressure (π) was evaluated as a function of the subphase pH and temperature. At 20 °C, the lowest π was between the pH 4 and 8 isotherms. The highest surface pressure was 52 mN m–1 at 10 °C and pH 8, which denotes higher repulsive forces acting in the film. The elasticity of the asphaltene Langmuir films was affected by the ionization of acidic and basic groups on the asphaltene structure.

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Section: Results and Discussionmentioning

confidence: 99%

Effects of pH and Temperature on the Phase Behavior and Properties of Asphaltene Liquid Films

Kabbach

Santos

2017

Energy Fuels

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“…In fact, as it was expected, scenario Sc5 had the highest viscosity ( >2 000 000 cP) among samples as well as the lowest drop size (<25 μm), which is directly related to interfacial tension. 33,34 The production of such an oil would not be technically feasible. Under ideal conditions, it is expected that all oxygen should be consumed at the zone of the reservoir where the combustion occurs, performing a piston effect, pushing the raw oil evenly.…”

Section: Energy and Fuelsmentioning

confidence: 99%

Exploring Compositional Changes along In Situ Combustion and Their Implications on Emulsion Stabilization via Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS)

et al. 2017

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In situ combustion (ISC) is one of the highest potential enhanced oil recovery (EOR) processes for heavy oils. However, several operational issues, including the formation of highly stable emulsions, have limited its application. Disclosing the physicochemical proprieties of these emulsions, especially the chemical nature of the compounds involved in the stabilization process, has become relevant for the success of ISC projects. In the present work, the physicochemical changes at a laboratory-scale low-temperature oxidation (LTO) regimen performed over a Colombian heavy crude oil were followed by mass spectrometry. The compositional analyses were performed using both positive-ion atmospheric pressure photoionization ((+) APPI) and negative-ion electrospray ionization ((−) ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Further isolation of acidic compounds and surface-active species allowed us to determine that the process incorporates a wide variety of compounds to build up the O/W (oil/water) interface, thus increasing the stabilizing tendency of the emulsions. During the combustion, oxygen is chemically incorporated to the crude over hydrocarbon compounds, as well as over sulfur- and nitrogen-containing compounds, generating classes such as O, O2, O3, O4, OS, NO2, and NO3 that explain the high viscosity and high stability of the emulsions.

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“…During EOR operations, emulsions can block highly pervious cavities, direct flow toward unswept zones, , decrease mobility, and improve the sweep efficiency. − Therefore, emulsions are a preferable choice over waterflooding for EOR applications . Both nanoemulsions and microemulsions have been studied for their potentials as field-scale EOR agents.…”

Section: Emulsion Stabilizationmentioning

confidence: 99%

Fundamental Mechanisms and Factors Associated with Nanoparticle-Assisted Enhanced Oil Recovery

Hussain

Cheng

Haggerty

et al. 2022

Ind. Eng. Chem. Res.

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Nanoparticles have been used in conventional enhanced oil recovery to improve the oil recovery efficiency. In this review, we analyzed the roles of nanoparticles in improving enhanced oil recovery. We focused on elucidating the fundamental mechanisms that regulate nanoparticle-induced enhanced oil recovery, including surface wettability alteration, interfacial tension reduction, mobility ratio increase, emulsion stabilization, and foam stabilization. We also discussed factors that control the success of nanoparticle-induced enhanced recovery. Finally, we outlined the current challenges and future research directions with respect to the applications of nanoparticles in enhanced oil recovery.

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Systematic Study of Heavy Oil Emulsion Properties Optimized with a New Chemical Formulation Approach: Particle Size Distribution

Abstract: Supporting informationFig. S1. ߮ of an unimodal lognormal distribution vs. σ. σ is the natural logarithm standard deviation in Eq. 4.

Cited by 18 publications

References 55 publications

Effects of pH and Temperature on the Phase Behavior and Properties of Asphaltene Liquid Films

Effects of pH and Temperature on the Phase Behavior and Properties of Asphaltene Liquid Films

Exploring Compositional Changes along In Situ Combustion and Their Implications on Emulsion Stabilization via Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS)

Fundamental Mechanisms and Factors Associated with Nanoparticle-Assisted Enhanced Oil Recovery

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