High pressure densities of two nanostructured liquids based on the bis(trifluoromethylsulfonyl)imide anion from (278 to 398) K and up to 120 MPa. (March 2018)

• Record Type: Journal Article
• Authors: Dakkach, Mohamed; Gaciño, Félix M.; Mylona, Sofia K.; Comuñas, María J.P.; Assael, Marc J.; Fernández, Josefa
• Is Part Of: Journal of chemical thermodynamics. Volume 118(2018)
• Page Start: 67
• Page End: 76
• Publication Date: 2018-03
• Subjects: Density -- High pressure -- Ionic liquid -- Isothermal compressibility -- Thermal expansivity; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2017.10.012
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: Volumetric properties of two ILs are studied from (278.15 to 398.15) K up to 120 MPa. Over this Tp interval [N4111 ][NTf2 ] is less dense than [C4 C1 Pyr][NTf2 ]. κT of the studied ILs are lower than those of some hydraulic conventional lubricants. Paduszynski and Domanska method predicts density of these ILs with ADDs of 0.33%. Abstract: In this article the volumetric behaviour of the nanostructured liquids, butyltrimethylammonium bis(trifluoromethylsulfonyl)imide and 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, is reported. Density was measured in the temperature range (278.15–398.15) K up to 120 MPa with a high pressure densimeter based on the vibrating tube principle. Experimental densities were correlated as a function of temperature and pressure by means of the Tammann-Tait equation obtaining standard deviations lower than 3.5 × 10 −4 g·cm −3 . In addition, the isobaric thermal expansivity and the isothermal compressibility have been calculated from the Tait-like correlation. Furthermore, two group contribution methods proposed by Gardas and Coutinho and by Jacquemin et al. were applied to these fluids to analyse their prediction abilities for the high-pressure density.