Interfacial Tensions of Imidazolium-Based Ionic Liquids with <i>N</i>-Alkanes and Cyclohexane

Zhang, Xiangjing; Liu, Yumin; Hu, Yongqi

doi:10.1021/je200349t

Cited by 27 publications

(13 citation statements)

References 16 publications

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“…204 Although some work has been conducted on the surface tension of IL/DES-H 2 O binary systems, the experimental data over a whole compositional range at different temperatures is still scarce. 62 For the interfacial tension, 205 only few results were published.…”

Section: Other Important Properties -Surface and Interfacial Tensionsmentioning

confidence: 99%

The peculiar effect of water on ionic liquids and deep eutectic solvents

et al. 2018

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Section: Other Important Properties -Surface and Interfacial Tensionsmentioning

confidence: 99%

The peculiar effect of water on ionic liquids and deep eutectic solvents

et al. 2018

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“…To increase our knowledge on the separations of two liquids involving ionic liquids (ILs), it is also essential to study the IFT of ILs in addition to the surface tension. 5 Though much attention has been paid to this topic, at present there are only very limited values of physical properties known to engineers who are tasked with improving methods that use ILs for engineering applications. 6 Ionic liquids have been widely used for diverse applications in science and engineering, such as organic and inorganic synthesis, catalysis, extraction and separation, electrochemistry, biomass conversion, etc.…”

Section: Introductionmentioning

confidence: 99%

“…However, for the study of the effect of temperature, combination of surfactant system was not found to exhibit significant effect on the IFT due to synergism. 21 The information on the IFT of a few [C n -mim][BF 4 ]/alkane systems and [C n -mim][PF 6 ]/alkane systems were measured by Wang 5 and his co-workers. The interfacial tensions of the four imidazolium-based ILs ([C n -mim][BF 4 ]; where n = 3−6) with hexane, heptane, and cyclohexane were taken at different experimental temperatures in the range of 288.15 to 328.15 K at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Similar results were observed for the interfacial tensions of four other imidazolium-based ILs ([C n -mim][PF 6 ]; where n = 5−8) with hexane and heptane. 5,22 The IFT measurements of several 1,3-dialkyl imidazoliumbased ionic liquids in water and n-hexane/n-octane/n-decane was performed as a function of temperature from 293 to 323 K. An increase in temperature slightly decreased the interfacial tension of water−alkane system. The anion and alkyl chain length of ILs were found to have a substantial impact on the IFT of aqueous solutions of IL−n-alkane systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Use of Aromatic Ionic Liquids in the Reduction of Surface Phenomena of Crude Oil–Water System and their Synergism with Brine

Sakthivel

Velusamy

Gardas

et al. 2015

Ind. Eng. Chem. Res.

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Enhanced oil recovery is governed primarily by the role of interfacial tension between crude oil and water. Interfacial tension (IFT) of the crude oil−water system is one of the vital factors in the analysis of the capillary forces affecting trapped oil within the reservoir rocks. High salinity and temperature of the reservoirs tend to make researchers search for new surfactants to lower the interfacial tension in crude oil−water systems. The current study hopes to create a move toward solving the above problem through the use of aromatic ionic liquids (ILs) based on imidazolium as the cation and various anions such as [HSO 4 ] − , and [PF 6 ] − in different concentrations. This work involves the study of the effect of concentration, temperature, time, and brine on the fate of surface tension (SFT) of water and interfacial tension of crude oil− water systems. The present study also addresses the trend in the electrical conductivity of ILs in water along with the effect of temperature and concentration of ILs. The study reveals that these ILs are effective in reducing the SFT and IFT of water and crude oil−water systems at high salinity and temperature conditions. In the IFT measurements, a linear decrement with increase in temperature is observed for crude oil−water in the presence of ILs. The interfacial tension of the various imidazolium-based ionic liquids with the crude oil−water system has been measured as a function of temperature by means of the Wilhelmy plate method. The influence of the nature of cation and anion of ionic liquids and of the chain length on the cationic head of the ILs on interfacial tension is also discussed in detail. At increased salinity conditions, unlike classical surfactants, these ILs are found to be more successful. Enhanced efficiency of the drop in IFT using NaCl and IL mixture has been confirmed by measuring the IFT between crude oil and the aqueous solution of IL. The synergism of salt and IL mixture on the reduction of IFT has been observed.

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“…This fact shows that data in this work are more reliable. 25 44.5 28 42.8 19 40.9 28 54.01 25 45.74 29 54.4 19 50.31 27 44.5 30 39.5 19 54.4 26 51.1 19 44.41 31 52.58 6 44.37 27 …”

Section: Introductionmentioning

confidence: 99%

Density, Surface Tension, and Refractive Index of Ionic Liquids Homologue of 1-Alkyl-3-methylimidazolium Tetrafluoroborate [C_nmim][BF₄] (n = 2,3,4,5,6)

et al. 2012

J. Chem. Eng. Data

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The values of density, surface tension, and refractive index were measured for a classic series of air and water stable ionic liquids (ILs) based on tetrafluoroborate, [C n mim][BF 4 ](n = 2,3,4,5,6)(1-alkyl-3-methylimidazolium tetrafluoroborate) in the temperature range of (298.15 to 338.15 ± 0.02) K. In terms of Glasser's theory, the standard molar entropy and lattice energy of the ILs were calculated. Using Kabo's method, the molar enthalpy of vaporization of the IL, Δ l g H m 0 (298 K), was estimated. According to the interstice model, the thermal expansion coefficient of ILs [C n mim][BF 4 ] (n = 2,3,4,5,6), α, were calculated, and in comparison with experimental value, their magnitude order is in good agreement. To test this new concept of ionic parachor, [BF 4 ] − was chosen as a reference ion and its individual value of ionic parachor was determined in terms of extrathermodynamic assumption. Then, using ionic parachor of [BF 4 ] − , the ionic parachors for all corresponding imidazolium cations, [C n mim] + , were calculated and in good agreement with those obtained by Guan's estimation, and the 17 anion ionic parachors were also obtained. In terms of ionic parachor, the surface tension and refractive index of the investigated ionic liquids were estimated, and the estimated values correlate quite well with their matching experimental values.

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Interfacial Tensions of Imidazolium-Based Ionic Liquids with N-Alkanes and Cyclohexane

Cited by 27 publications

References 16 publications

The peculiar effect of water on ionic liquids and deep eutectic solvents

The peculiar effect of water on ionic liquids and deep eutectic solvents

Use of Aromatic Ionic Liquids in the Reduction of Surface Phenomena of Crude Oil–Water System and their Synergism with Brine

Density, Surface Tension, and Refractive Index of Ionic Liquids Homologue of 1-Alkyl-3-methylimidazolium Tetrafluoroborate [C_nmim][BF₄] (n = 2,3,4,5,6)

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Interfacial Tensions of Imidazolium-Based Ionic Liquids with N-Alkanes and Cyclohexane

Cited by 27 publications

References 16 publications

The peculiar effect of water on ionic liquids and deep eutectic solvents

The peculiar effect of water on ionic liquids and deep eutectic solvents

Use of Aromatic Ionic Liquids in the Reduction of Surface Phenomena of Crude Oil–Water System and their Synergism with Brine

Density, Surface Tension, and Refractive Index of Ionic Liquids Homologue of 1-Alkyl-3-methylimidazolium Tetrafluoroborate [Cnmim][BF4] (n = 2,3,4,5,6)

Contact Info

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Density, Surface Tension, and Refractive Index of Ionic Liquids Homologue of 1-Alkyl-3-methylimidazolium Tetrafluoroborate [C_nmim][BF₄] (n = 2,3,4,5,6)