Tween-80–n-butanol/isobutanol–(Diesel+Kerosene)–Water microemulsions – Phase behavior and fuel applications

Acharya, Biswajit; Guru, Partha Sarathi; Dash, Sukalyan

doi:10.1016/j.fuel.2015.12.013

Cited by 15 publications

(6 citation statements)

References 26 publications

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“…Pseudoternary phase diagrams depicting different phases and outlining the importance of phase transitions in modeling experiments have been studied previously. − Phase transition from oil-in-water microemulsions to water-in-oil microemulsions through a bicontinuous phase is important for phase behavioral studies for application in EOR . Phase transition from a solid–liquid mixture to a two-phase region via a single phase microemulsion can be explained by use of empirical correlations .…”

Section: Introductionmentioning

confidence: 99%

Phase Behavior, Solubilization, and Phase Transition of a Microemulsion System Stabilized by a Novel Surfactant Synthesized from Castor Oil

Pal

Saxena

2017

J. Chem. Eng. Data

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Phase behavior, solubilization, and phase transition of a microemulsion system stabilized by a castor oil-based novel surfactant (sodium methyl ester sulfonate) and cosurfactant (propan-2-ol) were investigated for effective application in oil recovery processes. A pseudoternary phase diagram showed the existence of different phases (S/L phase, Winsor I, Winsor II, Winsor III, and Winsor IV) by conventional titration method. With an increase in the cosurfactant-to-surfactant ratio (K cs), the region under the Winsor III phase was found to increase. An increase in cosurfactant content in the system mixture improved interactions of the surfactant with oil and water in the microemulsion phase, thereby reducing molecular aggregations in solution. At optimal salinity, equal amounts of oil and water were solubilized in a microemulsion in the Winsor III systems and showed ultralow interfacial tension (IFT) values on the order of 10–3 to 10–4 mN/m. Phase dilution studies revealed that the microemulsion systems formed were thermodynamically stable. Salinity increased the relative phase volume of a middle-phase microemulsion, whereas an increase in water content reduced the middle phase volume fractions in the Winsor III systems. Phase transition data were analyzed and fitted using empirical relationships. An increase in salinity and brine content caused phase transformation from Winsor I to Winsor II via Winsor III. However, an increase in temperature showed reverse phase transformation from Winsor II to Winsor III.

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Section: Introductionmentioning

confidence: 99%

Phase Behavior, Solubilization, and Phase Transition of a Microemulsion System Stabilized by a Novel Surfactant Synthesized from Castor Oil

Pal

Saxena

2017

J. Chem. Eng. Data

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“…They are a mixture of two immiscible liquids (most often hydrocarbon compounds and water), stabilized by a surfactant and an additional component (cosurfactant). The diameter of dispersed-phase droplets in microemulsions varies from 1 to 100 nm, most often 10–50 nm, making them clear or slightly turbid liquids. − Over the last 70 years, the fundamentals of microemulsions have been widely studied alongside their practical applications, e.g., using them to increase oil recovery, − as new fuel types, − in the synthesis of nanoparticles, , in the technologies of pharmaceutical and cosmetic product preparations, − etc.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, it is well known that microemulsions, especially those stabilized by nonionic surfactants, are highly susceptible to it. Over recent years, this issue has attracted considerable interest; studies have been published on the stability of MFs at temperatures other than room temperature. ,,,, When researching microemulsions as an alternative fuel, one should not forget about the significant temperature fluctuations in vast areas where diesel engines and power facilities are traditionally used. For countries and regions with cold and arctic climate (Russia, Canada, and Scandinavia), the low-temperature properties of liquid fuels and controlling them are of special significance.…”

Section: Introductionmentioning

confidence: 99%

Properties and Phase Behavior of Water-in-Diesel Microemulsion Fuels Stabilized by Nonionic Surfactants in Combination with Aliphatic Alcohol

et al. 2020

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We investigate the properties and phase behavior of the water−diesel fuel−Neonol AF 9-6/2-ethylhexanol system, which is regarded as a promising microemulsion fuel. A pseudoternary diagram of the system has been obtained. In the diesel fuel/ water (DF/W) ratio ranging from 98:2 to 50:50 and the emulsifier concentration of 8−40 vol %, a region of microemulsions has been distinguished, generating particular interest as an alternative fuel. In the region under study, a reverse micellar phase L 2 has existed predominantly. Fish-cut diagrams have been obtained for the DF/W ratios in the emulsifier concentration−temperature coordinates. An increase in the water fraction in microemulsions significantly has narrowed the range of their stability. The critical changes of microemulsion properties have been identified using the fish-cut diagrams. We have established the empirical relationship among the phase inversion temperature, the emulsifier concentration in the phase inversion point, and the water fraction in microemulsions.

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“…One of major approaches which has been reported in the literature for introducing water into the combustion zone is the use of diesel‐water emulsions . Microemulsions are clear, thermodynamically stable mixtures of oil, water and surfactant, which sometimes contains a co‐surfactant to fine tune the system . The three kinds of microemulsions are direct (oil dispersed in water, o/w), reversed (water dispersed in oil, w/o) and bicontinuous .…”

Section: Introductionmentioning

confidence: 99%

Formulation of an economical microemulsion of diesel/colza oil fuel and investigation of some physical parameters for its stability

Najjar

Heidari

Tazerout³

2017

Env Prog and Sustain Energy

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The formulation of an economical diesel/colza oil/water microemulsion fuel is reported. The modification of diesel fuel significantly improves its fuel properties as well as environmental pollution issues. To investigate the possibility of using colza oil with diesel fuel and adding water to reduce emissions of diesel combustion, the phase diagrams of the system were constructed using titration method with co‐surfactant. n‐Butanol is selected as co‐surfactant among the investigated alcohols with different chain lengths as it formed wide single phase area. Using of n‐butanol was helped to tune solubilizing of water in diesel/colza oil blend and to reduce its viscosity. Here, a 4:1 blend of diesel:colza oil, 5% water and n‐butanol was selected as base system which was then optimized to obtain a reasonably economical formulation with acceptable physical properties. According to the measurements of physical properties, such as viscosity, temperature stability, water droplet size and considering an economical point of view, the optimum microemulsion system was composed of 75% diesel/colza oil (4:1), 5% water, 10% n‐butanol, 8% Brij 30 and 2% Tween 80, and was prepared in room temperature (21–25) °C by stirring with 500 rpm for 5 min. The optimum system was stable up to 45°C. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1762–1769, 2018

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Tween-80–n-butanol/isobutanol–(Diesel+Kerosene)–Water microemulsions – Phase behavior and fuel applications

Cited by 15 publications

References 26 publications

Phase Behavior, Solubilization, and Phase Transition of a Microemulsion System Stabilized by a Novel Surfactant Synthesized from Castor Oil

Phase Behavior, Solubilization, and Phase Transition of a Microemulsion System Stabilized by a Novel Surfactant Synthesized from Castor Oil

Properties and Phase Behavior of Water-in-Diesel Microemulsion Fuels Stabilized by Nonionic Surfactants in Combination with Aliphatic Alcohol

Formulation of an economical microemulsion of diesel/colza oil fuel and investigation of some physical parameters for its stability

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