abstract
Over the last decade ionic liquids appeared as potential entrainers for extractive distillation processes. However experimental vapor-liquid equilibrium data for ionic liquid containing systems is still scarce since most conventional equilibrium cells are not adequate for these systems. To overcome that limitation a new isobaric microebulliometer, operating at pressures ranging from 0.05 to 0.1 MPa and requiring a sample volume lower than 8 mL was developed and validated in this work. The new apparatus was used to determine isobaric VLE data at pressures of 0.05, 0.07 and 0.1 MPa for eight binary mixtures of 1-ethyl-3-methylimidazolium chloride ([C(2)mim][Cl]), 1-butyl-3-methylimidazolium chloride ([C(4)mim][Cl]), 1-hexyl-3-methylimidazolium chloride ([C(6)mim][Cl]), and choline chloride ([N-111(2OH)[Cl]) with water and ethanol. The experimental data here measured were correlated with the NRTL model. (C) 2013 Elsevier B.V. All rights reserved.
keywords
BINARY-SYSTEMS; EXTRACTIVE DISTILLATION; HYPERBRANCHED POLYMERS; PRESSURE MEASUREMENT; ETHANOL-WATER; PLUS ETHANOL; MIXTURES; CHLORIDE; KPA
subject category
Thermodynamics; Chemistry; Engineering
authors
Carvalho, PJ; Khan, I; Morais, A; Granjo, JFO; Oliveira, NMC; Santos, LMNBF; Coutinho, JAP
our authors
Imran Khan
Post-Doc Fellowship
Pedro J. Carvalho
Assistant Professoracknowledgements
The authors are thankful for financial support from Fundacao para a Ciencia e a Tecnologia (Project PTDC/EQU-FTT/102166/2008), Laboratorio Associado Centro de Investigacao em Materiais Ceramicos e Compositos (Project Pest-C/CTM/LA0011/2011), the Doctoral grant (SFRH/BD/64338/2009) of Jose F.O. Granjo and Post-Doctoral grants (SFRH/BPD/82264/2011 and SFRH/BPD/76850/2011) of Pedro J. Carvalho and Imran Khan, respectively.