Measurement of high pressure densities and atmospheric pressure viscosities of alkyl phosphate anion ionic liquids and correlation with the ε ∗ -modified Sanchez-Lacombe equation of state

Hiraga, Yuya; Goto, Musashi; Satō, Yoshiyuki; Smith, Richard L.

doi:10.1016/j.jct.2016.09.013

Cited by 19 publications

(18 citation statements)

References 53 publications

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“…While in this work [C 4 C 1 im][DMP] was dried and manipulated under a dry atmosphere in order to avoid water absorption, Gong et al [36] for example do no mention any special care or the water content of the sample used in their measurements. The experimental viscosity values for pure [C 4 C 1 im] [NTf 2 ] measured in this work are in good agreement with the values reported by Hiraga et al [38] (%ARD ¼ 1.3) and Liu et al [41] (%ARD ¼ 4.1).…”

Section: Viscosity Of the Pure Ionic Liquidssupporting

confidence: 92%

“…The differences are usually due to the well-known impact of water in this property [53]. Among others, Gong et al [36] and Hiraga et al [38] reported the viscosity of [C 4 C 1 im][DMP] between 293 and 373 K. An average relative deviation of 3.7 and 9.2%, respectively, to the data here published is observed. While in this work [C 4 C 1 im][DMP] was dried and manipulated under a dry atmosphere in order to avoid water absorption, Gong et al [36] for example do no mention any special care or the water content of the sample used in their measurements.…”

Section: Viscosity Of the Pure Ionic Liquidssupporting

confidence: 59%

“…Gong et al [36], Almeida et al [37] and Hiraga et al [38] [37,39e41]. To the best of our knowledge the protic ILs densities are here reported for the first time.…”

Section: Density Of the Pure Ionic Liquidsmentioning

confidence: 55%

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Selection and characterization of non-ideal ionic liquids mixtures to be used in CO2 capture

Martins

Sharma

Pinho

et al. 2020

Fluid Phase Equilibria

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Due to the costs involved, the capture of CO 2 in post-combustion is not currently seen as economically viable. Aiming at changing the perception of post-combustion CO 2 from a costly and non-profitable process to a valuable commodity and fostering the development of the next-generation of technologies, novel solvents and their mixtures have been investigated. In this work, mixtures of non-volatile ionic liquids were screened by COSMO-RS aiming to find mixtures with positive excess volumes that could present an increased CO 2 capture by physical sorption. The most promising mixtures identified by COSMO-RS, [C 4 C 1 im][DMP] or [C 4 C 1 im][NTf 2 ] þ carboxylate-based protic ILs were characterized through the measurement of their thermophysical properties, namely density and viscosity. Both properties were measured for pure ILs and their binary mixtures at different temperatures and compositions. The temperature dependence of density of pure ILs was described using the Gardas and Coutinho model while viscosity was accurately described using the VogelÀTammannÀFulcher equation. The Redlich-Kister equation was used to predict the excess molar volumes and the non-ideality of the mixtures' viscosity was assessed using the Grunberg and Nissan mixing law. The excess molar volumes for mixtures containing [C 4 C 1 im][DMP] show large positive values all over the range of compositions and temperatures, making them good candidates for CO 2 capture. To the best of our knowledge, the excess molar volumes obtained in this work were the highest reported so far. COSMO-RS was able to correctly predict the trend of the experimental excess molar volumes for these mixtures. Regarding viscosity, mixtures of [C 4 C 1 im] [DMP] with the carboxylate-based protic ILs led to the desired viscosity decrease compared to the pure aprotic IL, and large deviations from ideality were observed. The mixing of ILs is thus an efficient way to fine-tune the properties, in this case decreasing the viscosity while increasing the sorption capacity.

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Section: Viscosity Of the Pure Ionic Liquidssupporting

confidence: 92%

Section: Viscosity Of the Pure Ionic Liquidssupporting

confidence: 59%

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Selection and characterization of non-ideal ionic liquids mixtures to be used in CO2 capture

Martins

Sharma

Pinho

et al. 2020

Fluid Phase Equilibria

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“…From Figures S21a and S22a, it can be observed that both α P and β T for the ionic liquids measured in this work had similar trends as those previously reported for ionic liquids. 25,28,32 Especially, the specific trend of α P , which decreased with increasing temperature and appears to be contrary to molecular solvents, is in correspondence with theory according to previous observations. 25,28,32 From Figures S21b and S22b , respectively.…”

Section: Journal Of Chemical and Engineering Datasupporting

confidence: 90%

Measurement and Correlation of High-Pressure Densities and Atmospheric Viscosities of Ionic Liquids: 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide), 1-Allyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide, 1-Ethyl-3-methylimidazolium Tetracyanoborate, and 1-Hexyl-3-methylimidazolium Tetracyanoborate

et al. 2018

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Four ionic liquids, [bmpyr][Tf2N] (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide), [amim][Tf2N] (1-allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), [emim][TCB] (1-ethyl-3-methylimidazolium tetracyanoborate), and [hmim][TCB] (1-hexyl-3-methylimidazolium tetracyanoborate), were studied. High-pressure densities were measured at pressures up to 200 MPa and at temperatures of 312−433 K. Densities and viscosities at atmospheric pressure were measured over a temperature range of 293 to 373 K, and average relative deviation (ARD) of correlation with Vogel–Fulcher–Tammann equation for viscosity were within 0.08%. Correlation of the density data with the Tait equation could be obtained to within 0.02% ARD. Isobaric expansivities calculated from the Tait equation were constant or decreased slightly with increasing temperature in accordance with trends commonly reported for ionic liquids. Parameters for the ε*-modified Sanchez–Lacombe equation of state are tabulated that allow correlation of the ionic-liquid high-pressure densities to within an ARD of less than 0.08%.

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“…Density and the derived volumetric properties at various conditions of temperature and pressure are of highest importance for the numerous industrial processes as well as for theoretical calculations such as equations of state development. These data are also essential in the ionic liquids design in order to get the most suitable compound for a particular purpose. ,− …”

Section: Introductionmentioning

confidence: 99%

Densities and Derived Volumetric Properties of Ionic Liquids with [Nf₂] and [NTf₂] Anions at High Pressures

et al. 2018

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The densities of four ionic liquids: 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide ([E3Mim][Nf2]), n-propyl-n-methylpyrrolidinium bis(fluorosulfonyl)imide ([PMpyr][Nf2]), 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide ([BMpyr][Nf2]), and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonil)imide ([BMpyr][NTf2]) were measured at temperatures (293.15 to 413.15) K and pressures (0.1 to 60) MPa. The experimental density data were modeled using the modified Tammann–Tait equation and the average absolute percentage deviations between measured and calculated values for all studied ionic liquids were less than 0.004%. The optimized parameters were used to calculate the isothermal compressibility, the isobaric thermal expansivity, the internal pressure, and the difference between specific heat capacities at constant pressure and at constant volume. The cation and anion influences on the properties of the ionic liquids were examined. The longer alkyl chains on cations are related to lower density of ionic liquids and ionic liquids with imidazole based cation are denser than those with pyrrolidinium cation. The presence of more stabile [NTf2]− anion in ionic liquids leads to greater densities comparing to [Nf2]− anion.

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Measurement of high pressure densities and atmospheric pressure viscosities of alkyl phosphate anion ionic liquids and correlation with the ε ∗ -modified Sanchez-Lacombe equation of state

Cited by 19 publications

References 53 publications

Selection and characterization of non-ideal ionic liquids mixtures to be used in CO2 capture

Selection and characterization of non-ideal ionic liquids mixtures to be used in CO2 capture

Densities and Derived Volumetric Properties of Ionic Liquids with [Nf₂] and [NTf₂] Anions at High Pressures

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Measurement of high pressure densities and atmospheric pressure viscosities of alkyl phosphate anion ionic liquids and correlation with the ε ∗ -modified Sanchez-Lacombe equation of state

Cited by 19 publications

References 53 publications

Selection and characterization of non-ideal ionic liquids mixtures to be used in CO2 capture

Selection and characterization of non-ideal ionic liquids mixtures to be used in CO2 capture

Densities and Derived Volumetric Properties of Ionic Liquids with [Nf2] and [NTf2] Anions at High Pressures

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Densities and Derived Volumetric Properties of Ionic Liquids with [Nf₂] and [NTf₂] Anions at High Pressures