The influence of water on the thermophysical properties of 1-ethyl-3-methylimidazolium acetate

Queirós, Carla S. G. P.; Paredes, Xavier; Avelino, T.F.S.; Bastos, David; Ferreira, Mário B.; Santos, Filipa C.; Santos, Ana Isabel; Lopes, Manuel Matos; Lourenço, Maria José; Pereira, Helena; Castro, C. A. Nieto de

doi:10.1016/j.molliq.2019.111925

Cited by 18 publications

(53 citation statements)

References 77 publications

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“…The refractive index of [C 4 mim][(C 2 F 5 ) 3 PF 3 ] n D was measured in the temperature range T = (283.15–353.15) K. The refractive index decreases with the increase in temperature. This behavior was already reported for other ionic liquids. ,− …”

Section: Results and Discussionsupporting

confidence: 86%

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C₄mim][(C₂F₅)₃PF₃], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

et al. 2021

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Thermophysical properties of 1-butyl-3-methylimidazoliumtris-(pentafluoroethyl) trifluorophosphate, [C 4 mim][(C 2 F 5 ) 3 PF 3 ] (CAS RN 917762-91-5) ionic liquid, were measured in the temperature range T = (283.15−353.15) K, at P = 0.1 MPa. These properties include density, isobaric heat capacity, speed of sound, refractive index, viscosity, and thermal conductivity and their correlation as a function of temperature. Data obtained were compared with the available literature, whenever available. Comparison of these results with those reported for ILs with the same cation or anion is presented and discussed. Derived quantities such as isobaric expansivity and isothermal and isentropic compressibility were also estimated. Arrhenius, Ghatee, Vogel− Fulcher−Tammann, and IUPAC equations were applied to correlate viscosity data dependence on temperature, the last one being more effective and accurate. An estimation method for thermal conductivity of ILs was applied. Calculated values by this equation deviate from the experimental data between −15.6% at 293 K and −17.9% at 353 K, within the mutual uncertainty of these data and estimation. The thermal conductivity of the IoNanofluid made from the dispersion of multi-walled carbon nanotubes (1% wt MWCNTs) in [C 4 mim][(C 2 F 5 ) 3 PF 3 ] was determined. The enhancement in thermal conductivity due to the presence of MWCNTs was found to vary between 4% at 293 K and 9.6% at 353 K, an average of 6.2%, weakly dependent on temperature.

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Section: Results and Discussionsupporting

confidence: 86%

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C₄mim][(C₂F₅)₃PF₃], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

et al. 2021

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“…The possible existence of ultrasonic absorption in the measurement of the speed of sound of ionic liquids with Anton Paar DSA 5000 sound velocity meter was analyzed due to the strong absorption in the low-frequency range (less than 10 MHz) discussed by Dzida et al 15 The experience in this laboratory with amphiphilic compounds in water has shown in fact that reproducibility between measurements could not be achieved at this frequency for such water mixtures. However, any sign of similar phenomena with ionic liquids was never noticed, for temperatures greater than 293 K. 8,10,16 Following the results obtained for [C 2 mim]-[CH 3 SO 3 ] by Musiał et al, 17 we have compared all of the deviations of the available experimental data form the correlations proposed by Bioucas et al 2 in Figure S7. This figure shows that there is a very good agreement with the data of Marium et al 18 (±1.5 m•s −1 ; ±0.06%), and those of Musiał et al 1717 deviate around −1.3 m•s −1 (−0.07%), within the mutual uncertainty of data.…”

Section: Methodsmentioning

confidence: 74%

“…Additionally, the structure of the mixtures will be discussed, using our experimental results and the data available based on correlation spectroscopy and computer simulations for this and similar mixtures of hydrophilic ionic liquids with water, like [C 2 mim]-[C 2 H 5 SO 4 ], 4 [C 4 mim][BF 4 ], 5,6 and [C 2 mim][CH 3 COO]. 7,8 This study will be complemented with heat transfer studies in pilot heat exchangers, to decide about its suitability as a new and more efficient heat transfer fluid, the ionic liquid possibly also promoting better lubrication and protection/pickling effect on the surface of the metallic plates (usually stainless steel) of the heat exchanger. Preliminary results show that selected [C 2 mim][CH 3 SO 3 ] + water mixtures have thermophysical properties that contribute to energy and capital savings in cylindrical tube heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

[C₂mim][CH₃SO₃]─A Suitable New Heat Transfer Fluid? Part 2: Thermophysical Properties of Its Mixtures with Water

Bioucas

Queirós

Lozano-Martín

et al. 2022

Ind. Eng. Chem. Res.

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Ionic liquids have proved to be excellent heat transfer fluids and alternatives to common HTFs used in industries for heat exchangers and other heat transfer equipment. However, its industrial utilization depends on the cost per kg of its production, to be competitive for industrial applications with biphenyl and diphenyl oxide, alkylated aromatics, and dimethyl polysiloxane oils, which degrade above 200 °C and possess some environmental problems. The efficiency of a heat transfer fluid depends on the fundamental thermophysical properties influencing convective heat transfer (density, heat capacity, thermal conductivity, and viscosity), as these properties are necessary to calculate the heat transfer coefficients for different heat exchanger geometries. In Part 1, the thermophysical properties of pure 1-ethyl-3-methylimidazolium methanesulfonate [C2mim][CH3SO3] (CAS no. 145022-45-3), (ECOENG 110), produced by BASF, under the trade name of Basionics ST35, with an assay ≥97% with ≤0.5% water and ≤2% chloride (Cl–), were presented, for temperatures slightly below room temperature and up to 355 K. In this paper, we report the thermophysical properties of mixtures of [C2mim][CH3SO3] with water, in the whole concentration range, at P = 0.1 MPa. The properties measured were density and speed of sound (293.15 < T/K < 343.15), viscosity, electrical and thermal conductivities, refractive index (293.15 < T/K < 353.15), and infinite dilution diffusion coefficient of the ionic liquid in water (298.15 K). The properties for the mixture like the isobaric expansion coefficient, the isentropic compressibility, apparent molar volumes, apparent molar isentropic compressions, and the thermodynamic excess properties, like excess molar volume, excess molar isobaric expansion and isentropic compression, excess viscosity, thermal conductivity, molar refraction, and infinite dilution diffusion coefficients of the cation, anion and other common anions in ionic liquids were obtained within this temperature range. The validity of the Walden relation for this ionic liquid was also determined. This amount of experimental information, in addition to recent molecular simulation studies available in the literature give a clear picture of the structure of these binary mixtures and the influence of composition and temperature, paving the way to a technological discussion of the possible application of these mixtures as new heat transfer fluids or battery electrolytes.

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“…In the work of Fröba et al, the guarded parallel plate method was used to measure the thermal conductivity of several ILs. Tomida et al measured the thermal conductivities of different ILs using the transient hot-wire method over a temperature range of 294 to 335 K. Apart from this, there is some data available on binary IL–water mixtures, which also appears to have promising results for further customizability and heat-transfer applications. − …”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivities of NTf₂-Based Ionic Liquids: Experimental Measurement and Prediction via Group Contribution Methods

et al. 2022

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Thermal conductivities of nine different bis((trifluoromethyl)sulfonyl)imide-based ionic liquids (ILs), [C2mim][NTf2], [C4mmim][NTf2], [C8mim][NTf2], [P1,4,4,4][NTf2], [N1,1,1,4][NTf2], [N1,8,8,8][NTf2], [C4 3mpy][NTf2], [C4 4mpy][NTf2], and [C4mpy][NTf2], have been measured using the modified transient plane source method (MTPS) over the temperature range from 298 to 348 K at atmospheric pressure. The thermal conductivities of all the studied ILs are in the range of 0.120–0.150 W·m–1·K–1, with a combined expanded uncertainty of 0.01 W·m–1·K–1 at a 95% confidence level. In all cases, thermal conductivity decreases with increasing temperature and follows a linear trend, as is typical for most liquids and falls within the reported range for ILs. Two existing group contribution models (GCMs) with differing modeling philosophies have also been extended and tested against a database consisting of this new data combined with all existing IL thermal conductivity data in the literature. The extended GCMs yielded average absolute relative deviations of 5.5% and 4.9%, respectively, for the entire dataset.

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The influence of water on the thermophysical properties of 1-ethyl-3-methylimidazolium acetate

Cited by 18 publications

References 77 publications

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C₄mim][(C₂F₅)₃PF₃], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C₄mim][(C₂F₅)₃PF₃], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

[C₂mim][CH₃SO₃]─A Suitable New Heat Transfer Fluid? Part 2: Thermophysical Properties of Its Mixtures with Water

Thermal Conductivities of NTf₂-Based Ionic Liquids: Experimental Measurement and Prediction via Group Contribution Methods

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The influence of water on the thermophysical properties of 1-ethyl-3-methylimidazolium acetate

Cited by 18 publications

References 77 publications

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C4mim][(C2F5)3PF3], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C4mim][(C2F5)3PF3], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

[C2mim][CH3SO3]─A Suitable New Heat Transfer Fluid? Part 2: Thermophysical Properties of Its Mixtures with Water

Thermal Conductivities of NTf2-Based Ionic Liquids: Experimental Measurement and Prediction via Group Contribution Methods

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Product

Resources

About

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C₄mim][(C₂F₅)₃PF₃], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

Thermophysical Properties of 1-Butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, [C₄mim][(C₂F₅)₃PF₃], and of Its IoNanofluid with Multi-Walled Carbon Nanotubes

[C₂mim][CH₃SO₃]─A Suitable New Heat Transfer Fluid? Part 2: Thermophysical Properties of Its Mixtures with Water

Thermal Conductivities of NTf₂-Based Ionic Liquids: Experimental Measurement and Prediction via Group Contribution Methods