Measurements and Correlation of High-Pressure Densities of Imidazolium-Based Ionic Liquids

Tomé, Luciana I.N.; Carvalho, Pedro J.; Freire, Mara G.; Marrucho, Isabel M.; Fonseca, I.M.A.; Ferreira, A.G.M.; Coutinho, João A. P.; Gardas, Ramesh L.

doi:10.1021/je800316b

Cited by 132 publications

(52 citation statements)

References 38 publications

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“…Fourteen data sets on [Bmim][PF 6 ] were taken from the literature [23][24][25][26][27][28][29][30][31][32][33][34][35][36], the predicted densities of IL using TM EOS was evaluated, and results are summarized in Table 2 [40,[53][54][55][56][57] and their results are shown in Table 7 representing the suitability of TM EOS with respect to other equations of state. 4 ] from measurements [28,[58][59][60] are listed in Table 8.…”

Section: Resultsmentioning

confidence: 99%

Modification of Tao–Mason equation of state to ionic liquids

Yousefi

Karimi

2011

Ionics

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In our previous paper, we extended the Tao and Mason equation of state (TM EOS) to refrigerant fluids, using the speed of sound data. Here, we predict the equation of state for ionic liquids (ILs). The considered ILs are [Bmim]The equation of state consists of three temperaturedependent parameters: the second virial coefficient, a constant for scaling the softness of repulsive force, and an effective hard-sphere diameter equivalent to the van der Waals co-volume. The second virial coefficients of ILs are scare and there is no accurate potential energy function to allow their theoretical calculation. In this work, the second virial coefficient have been calculated using corresponding states correlation based on temperature and density at normal boiling point. The other two parameters of the equation of state can be calculated using a scaling rule. Analysis of our predicted results shows that the TaoMason equation of state is capable of accurately predicting the density of ILs at any temperature and pressure. The overall average absolute deviation densities for 1,633 data points are 2.05%. Also, the density of ILs obtained from the TM EOS has been compared with those calculated from vdW-CS-β and Peng-Robinson (PR) equation of state. Our results are in favor of the preference of the TM EOS over the two other equations of state. The overall average absolute deviation for 1,633 data points calculated by vdW-CS-β and PR equation of state are 6.63% and 12.19%, respectively.

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Section: Resultsmentioning

confidence: 99%

Modification of Tao–Mason equation of state to ionic liquids

Yousefi

Karimi

2011

Ionics

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“…Lattice models [133,134], [137], [140,141] [ 133,134], [137], [140,141] [ 134,135], [137], [140] [ 134,135], [138] Solubility of CO2 and CF3H at high pressure up to 100 [87], [105] [68], [87], [105,106] [ 68,69], [98] SLE, LLE and VLE of binary mixtures between several pyridiniums with alcohols and thiophene. Activity coefficients of quaternary ammonium salts in water.…”

Section: Classical Modelsmentioning

confidence: 99%

“…Yang et al [134] have successfully correlated infinite diluted activity coefficients, vapor pressures of solvents and liquid-liquid equilibria of ionic liquids solutions with a modified lattice model, which takes into account the hydrogen bonding through an exchange energy function. Tome et al [135] have modeled high pressure experimental densities of imidazolium ionic liquids by means of the SanchezLacombe equation of state [136]. Kim et al [137] have used a group contribution form of a nonrandom lattice-fluid model to predict solubilities of carbon dioxide in ionic liquids.…”

Section: Lattice Modelsmentioning

confidence: 99%

Modeling ionic liquids and the solubility of gases in them: Recent advances and perspectives

Vega

Vilaseca

Llovell

et al. 2010

Fluid Phase Equilibria

229

172

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“…8 with A = 0.1244 g · cm −3 · W · m −1 · K −1 and B = 18.84 g 2 · cm −3 · W · m −1 · K −1 · mol −1 : , this study; , Van Valkenburg et al [12]; , Tomida et al [20]; , Tomida et al [21]; , Ge et al [22]; , Chen et al [23]; , Nieto de Castro et al [24]; ♦, Gardas et al [25] that the thermal conductivity and density data for [ 6 ] from Tomida et al [21], who have studied the ILs at three temperatures in the range between (294 and 335) K, were extrapolated to 293.15 K. For processing the results of another study of Tomida et al [20], the density for [BMIM] [BF 4 ] was adopted from the study of Van Valkenburg et al [12]. For the study of Ge et al [22], the densities for (1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate) were adopted from [34,45,[48][49][50][51][52][53][54], respectively. For the datum given by Chen et al [23] for [BMIM][NTf 2 ], the density was also adopted from [48].…”

Section: Prediction Of the Thermal Conductivity Of Ilsmentioning

confidence: 99%

Thermal Conductivity of Ionic Liquids: Measurement and Prediction

et al. 2010

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This study reports thermal-conductivity data for a series of [EMIM] (1-ethyl-3-methylimidazolium)-based ionic liquids (ILs) having the anions [NTf 2 ] (bis(trifluoromethylsulfonyl)imide), [OAc] (acetate), [N(CN) 2 ] (dicyanimide), [C(CN) 3 ] (tricyanomethide), [MeOHPO 2 ] (methylphosphonate), [EtSO 4 ] (ethylsulfate), or [OcSO 4 ] (octylsulfate), and in addition for ILs with the [NTf 2 ]-anion having the cations [HMIM] (1-hexyl-3-methylimidazolium), [OMA] (methyltrioctylammonium), or [BBIM] (1,3-dibutylimidazolium). Measurements were performed in the temperature range between (273.15 and 333.15) K by a stationary guarded parallelplate instrument with a total measurement uncertainty of 3 % (k = 2). For all ILs, the temperature dependence of the thermal conductivity can well be represented by a linear equation. While for the [NTf 2 ]-based ILs, a slight increase of the thermal conductivity with increasing molar mass of the cation is found at a given temperature, the [EMIM]-based ILs show a pronounced, approximately linear decrease with increasing molar mass of the different probed anions. Based on the experimental data obtained in this Electronic supplementary material The online version of this article (study, a simple relationship between the thermal conductivity, molar mass, and density is proposed for the prediction of the thermal-conductivity data of ILs. For this, also densities were measured for [EMIM][OAc], [EMIM][C(CN) 3 ], and [HMIM][NTf 2 ].The mean absolute percentage deviation of all thermal-conductivity data for ILs found in the literature from the proposed prediction is about 7 %. This result represents a convenient simplification in the acquisition of thermal conductivity information for the enormous amount of structurally different IL cation/anion combinations available.

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Measurements and Correlation of High-Pressure Densities of Imidazolium-Based Ionic Liquids

Cited by 132 publications

References 38 publications

Modification of Tao–Mason equation of state to ionic liquids

Modification of Tao–Mason equation of state to ionic liquids

Modeling ionic liquids and the solubility of gases in them: Recent advances and perspectives

Thermal Conductivity of Ionic Liquids: Measurement and Prediction

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