abstract
Isobaric vapor liquid equilibria (VLE) of binary mixtures of the ionic liquid (IL) 1-butyl-3-methylimidazolium trifluoromethanesulfonate (C(4)mimTfO) with either water or short chained n-alkyl alcohols (methanol, ethanol, propan-1-ol, and butan-1-ol) are described in this study. Two different microebulliometers and a classical VLE apparatus were compared and the VLEs were determined in the composition range 0.4 <= x(solvent) <= 1 at three different pressure levels (p = 500 mbar, 700 mbar, and 1000 mbar). The experimental data were modeled using the soft-SAFT equation of state, which was able to accurately describe the nonideal behavior of these mixtures. The combined experimental-modeling results obtained contribute to establish the structure property relationship between the C(4)mimTfO and n-alkyl alcohol molecules and to infer about its influence on the phase behavior of these solvents.
keywords
DIRECTIONAL ATTRACTIVE FORCES; EQUATION-OF-STATE; ACETONE PLUS METHANOL; TEMPERATURE IONIC LIQUIDS; ORGANIC OXYGEN COMPOUNDS; HIGH-PRESSURE SEPARATION; TERNARY-SYSTEM ETHANOL; SOFT-SAFT EQUATION; THERMODYNAMIC PROPERTIES; PHASE-BEHAVIOR
subject category
Chemistry
authors
Stuckenholz, M; Crespo, EA; Vega, LF; Carvalho, PJ; Coutinho, JAP; Schroer, W; Kiefer, J; Rathke, B
our authors
Emanuel de Almeida Crespo
Collaborator
Pedro J. Carvalho
Assistant ProfessorProjects
EXIL - Exchange on Ionic Liquids (EXIL)
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)
Projeto de Investigação Exploratória: Pedro Carvalho (IF/00758/2015)
acknowledgements
The authors gratefully acknowledge financial support by Forschungsforderung Universitat Bremen and by the STSM of M. Stuckenholz within the COST action CM1206-30741, EXIL Exchange on Ionic Liquids. This work was developed in the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (ref. FCT UID/CTM/50011/2013), funded by FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalizacao (POCI) and by national funds through FCT -Fundacao para a Ciencia e a Tecnologia. P. J. Carvalho acknowledges FCT for a contract under the Investigador FCT 2015, Contract IF/00758/2015, and E. A. Crespo acknowledges Ph.D. Grant SFRH/BD/130870/2017.