Density, Speed of Sound, and Dynamic Viscosity of 1-Butyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide/1-Butyl-3-methylimidazolium Hexafluorophosphate and N-Methylaniline Binary Systems from T = 298.15 to 323.15 K at 0.1 MPa

Abstract

Density, speed of sound, and viscosity values were measured for different binary mixture concentrations of 1-butyl-3methylimidazolium bis(trifluoromethylsulfonyl)imide ([Bmim][NTf 2 ]) + N-methylaniline (NMA) and 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][Pf 6 ]) + NMA systems at temperatures from T = 298.15 to 323.15 K under atmospheric pressure. The excess values of molar volume, molar isentropic compressibility, intermolecular free length, and viscosity were calculated. The partial molar volumes and partial molar isentropic compressibilities at infinite dilutions were also estimated. The Redlich−Kister equation was utilized to evaluate coefficients and standard deviations. The mechanism of effective packing between [Bmim][NTf 2 ]/ [Bmim][Pf 6 ] and NMA was represented by the negative excess molar volumes. In both the studied systems, the occurrence of strong chemical interactions was represented by the negative excess intermolecular free length values. The present work clearly showed that the simultaneous analysis of excess properties could provide a comprehensive description of molecular interactions occurring in the binary mixtures, specifically if the component molecules have different sizes. Further, the high viscosities of the ionic liquids were decreased by mixing with low viscous NMA. Hence, the investigated systems could be more suitable for their possible applications in the transport mechanism and absorption of gasses.

Prediction of Liquid Phase Heat Capacity of Ionic Liquids: Comparison of Existing Methods and Development of New Hybrid Group Contribution Models

“…A comprehensive heat capacity database was compiled from the NIST ILThermo database based on the data available from over 150 references. − …”

Ligand Effect on Physicochemical Properties of Ionic Liquid

“…There are a number of literatures describing the physicochemical aspects of various ILs suited for diverse research domains. [42][43][44][45][46] As far as the detailed understanding of the physicochemical properties of ILs used as the diluent in conjunction with different extractants used for the reprocessing of SNFs is concerned, there are interesting reports those mainly deal with the understanding of different physicochemical properties of the most extensively used imidazolium based ionic liquid: 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C 4 mim][NTf 2 ]) containing a different class of nuclear extractants (extractants used for the separation of actinides and fission products). [47][48][49][50][51][52] Since the research in this direction is at its growing stage and is certainly an interesting research field, the accumulation of all the published results on various physicochemical properties of aforementioned solvent systems indeed would bring out the overall knowledge of an IL solvent for SNF reprocessing application.…”

“…The change in these properties affect the extraction efficiency of the system. There are a number of literatures describing the physicochemical aspects of various ILs suited for diverse research domains [42–46] . As far as the detailed understanding of the physicochemical properties of ILs used as the diluent in conjunction with different extractants used for the reprocessing of SNFs is concerned, there are interesting reports those mainly deal with the understanding of different physicochemical properties of the most extensively used imidazolium based ionic liquid: 1‐butyl‐3‐methylimidazolium bis(trifluoromethanesulfonyl)imide ([C 4 mim][NTf 2 ]) containing a different class of nuclear extractants (extractants used for the separation of actinides and fission products) [47–52] .…”

On the prediction of thermo‐physicochemical properties and equilibrium absorption of CO 2 into aqueous protic monoethanolamine glycinate ionic liquid

“…From an academic perspective, demonstrating the physicochemical properties of the ILs present some knowledge about the behavior, interface specification, and intermolecular interaction between ILs and solvent mixtures. Furthermore, the absorption performance of gasses in ILs is determined from the molar volumes and compressibility values calculated from density 9,10 …”