abstract
In the present work, experimental density measurements are reported along with the derived thermodynamic properties, such as the isothermal compressibility (K-T), the isobaric expansivity (alpha(p)), and the thermal pressure coefficient (gamma(upsilon),) for imidazolium-based ionic liquids (ILs), namely, 1-ethyl-3-methylimidazolium methylsulfate [C(2)mim][MeSO4], 1-ethyl-3-methylimidazolium ethylsulfate [C(2)mim][EtSO4], 1,3-diethylimidazolium bis(trifluoromethylsulfonyl)imide [C2mim][Tf2N], and 1-decyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C(10)mim][Tf2N] in the pressure (0.10 < P/MPa < 35.00) and temperature (293.15 < T/K < 393.15) domains. It is shown that experimental densities are in good agreement with the predicted densities obtained by the Gardas and Coutinho method and the correlation using the Tait equation and Sanchez-Lacombe equation of state.
keywords
PLUS METHANOL SYSTEM; RHO-T MEASUREMENTS; EQUATION-OF-STATE; THERMODYNAMIC PROPERTIES; BINARY-MIXTURES; 1-BUTYL-3-METHYLIMIDAZOLIUM TETRAFLUOROBORATE; 1-ETHYL-3-METHYLIMIDAZOLIUM ETHYLSULFATE; PHYSICAL-PROPERTIES; EXCESS VOLUMES; 333.15 K
subject category
Thermodynamics; Chemistry; Engineering
authors
Tome, LIN; Carvalho, PJ; Freire, MG; Marrucho, IM; Fonseca, IMA; Ferreira, AGM; Coutinho, JAP; Gardas, RL
our authors
Isabel Maria Delgado Jana Marrucho Ferreira
Full professor
Luciana Isabel Nabais Tomé
Post-doc Fellowship
Mara Guadalupe Freire Martins
Coordinating Researcher
Pedro J. Carvalho
Assistant ProfessorGroups
G4 - Renewable Materials and Circular Economy
G5 - Biomimetic, Biological and Living Materials
acknowledgements
This work was supported by Fundacao para a Ciencia e a Teenologia (Project POCI/EQU/58152/2004). R. L. Gardas, P. J. Carvalho, and M. G. Freire acknowledge the financial support from Fundacao para a Ciencia e a Tecnologia through, respectively, their postdoctoral (SFRH/BPD/23246/2005) and PhD. scholarships (SFRH/BD/41562/2007) and (SFRH/BD/14134/2003).