High temperature and pressure water/oil interfacial tension benchmark data for the Ninth Industrial Fluid Properties Simulation Challenge

Young, Timothy J.; Nelson, Christopher W.; Lyons-Bell, Carol; Moore, Jonathan D.

doi:10.1016/j.fluid.2018.07.032

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…Thus, by increasing the volume fraction of n -heptane, the IFT of the heptane/toluene mixture (heptol) increases. Furthermore, the IFT values of heptols are much closer to those of toluene than n -heptane, which indicates that the water/oil interface is enriched with toluene …”

Section: Resultsmentioning

confidence: 91%

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Adsorption Kinetics of Asphaltenes at the Heptol–Water Interface

Mohammadi

Zirrahi

2020

Energy Fuels

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The dynamic pendant drop method was employed to better understand the adsorption kinetics at the oil/water interface. Various volume ratios of n-heptane/toluene (heptol) have been chosen as solvents to represent the model of crude oil systems. The results show that an increase in the asphaltene concentration reduces the interfacial tension and this reduction is much more pronounced at higher fractions of n-heptane. The Ward–Tordai short-time model was used to estimate the diffusion coefficient of asphaltenes for dilute solutions of asphaltenes in heptol (up to 0.01 wt %). The results show that the asphaltene adsorbed as monomers onto the interface and the bulk nanoaggregates do not contribute to the adsorption process. Furthermore, the results reveal that the asphaltene diffusion coefficient decreases with increasing its concentration and decreasing solvent aliphaticity. The Langmuir adsorption isotherm was used to study the asphaltene behavior at the oil/water interface and to predict the parameters of adsorption kinetics. It was shown that asphaltenes were adsorbed as monomers onto the interface. The results show that at higher n-heptane fractions, more asphaltene molecules are adsorbed onto the interface. A higher concentration of n-heptane in solvent results in faster and more asphaltene adsorption on the oil/water interface leading to lower interfacial tension and thus promotes emulsification. These findings improve our understanding of adsorption kinetics of asphaltenes at the oil/water interface and find applications in oil/water separation and solvent-aided recovery of heavy oil and bitumen.

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Section: Resultsmentioning

confidence: 91%

“…Furthermore, the IFT values of heptols are much closer to those of toluene than n-heptane, which indicates that the water/oil interface is enriched with toluene. 34 3.2. Influence of Asphaltene Concentration and Type of Solvent.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Kinetics of Asphaltenes at the Heptol–Water Interface

Mohammadi

Zirrahi

2020

Energy Fuels

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“…In oil and gas fields, surfactants are injected into the underground formations due to their ability in improving oil recovery and modifying the surface energy of reservoir rocks [21]. Many oil reservoirs have been reported to have a relatively high temperature (70-130 • C), where most of the surfactant flooding research has been rarely conducted in such high-temperature environments.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Surfactant Partitioning in Pre-CMC and Post-CMC Regimes for Enhanced Oil Recovery Application

et al. 2019

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The applications of surfactants in Enhanced Oil Recovery (EOR) have received more attention in the past decade due to their ability to enhance microscopic sweep efficiency by reducing oil-water interfacial tension in order to mobilize trapped oil. Surfactants can partition in both water and oil systems depending on their solubility in both phases. The partitioning coefficient (Kp) is a key parameter when it comes to describing the ratio between the concentration of the surfactant in the oil phase and the water phase at equilibrium. In this paper, surfactant partitioning of the nonionic surfactant Alkylpolyglucoside (APG) was investigated in pre-critical micelle concentration (CMC) and post-cmc regimes at 80 °C to 106 °C. The Kp was then obtained by measuring the surfactant concentration after equilibration with oil in pre-cmc and post-cmc regimes, which was done using surface tension measurements and high-performance liquid chromatography (HPLC), respectively. Surface tension (ST) and interfacial tension (IFT) behaviors were investigated by performing pendant and spinning drop tests, respectively—both tests were conducted at high temperatures. From this study, it was found that APG was able to lower IFT as well as ST between water/oil and air/oil, and its effect was found to be more profound at high temperature. The partitioning test results for APG in pre-cmc and post-cmc regimes were found to be dependent on the surfactant concentration and temperature. The partitioning coefficient is directly proportional to IFT, where at high partitioning intensity, IFT was found to be very low and vice versa at low partitioning intensity. The effect of temperature on the partitioning in pre-cmc and post-cmc regimes had the same impact, where at a high temperature, additional partitioned surfactant molecules arise at the water-oil interface as the association of molecules becomes easier.

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“…Os estudos neste tipo de reservatório são muito mais complexos pois são caracterizados com mistos úmidos ou úmidos a óleo e muito heterógenos. Porém mais da metade das reservas mundiais são encontradas em carbonatos e, com isso, a aplicação da EOR em formações carbonáticas tem despertado interesse [4,5].…”

Section: Introductionunclassified

“…• Determinação da constante de equilíbrio de cada surfactante entre as fases água-óleo na presença e ausência de sal. a fase oleosa maior quando tivermos uma concentração maior [5,6,22,23].…”

Section: Introductionunclassified

Estudo Do Equilíbrio De Partição Água-Óleo De Surfactantes De Natureza Iônica E Não-Iônica

SILVA¹

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High temperature and pressure water/oil interfacial tension benchmark data for the Ninth Industrial Fluid Properties Simulation Challenge

Cited by 6 publications

References 5 publications

Adsorption Kinetics of Asphaltenes at the Heptol–Water Interface

Adsorption Kinetics of Asphaltenes at the Heptol–Water Interface

Experimental Investigation of Surfactant Partitioning in Pre-CMC and Post-CMC Regimes for Enhanced Oil Recovery Application

Estudo Do Equilíbrio De Partição Água-Óleo De Surfactantes De Natureza Iônica E Não-Iônica

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