Thermodynamic behavior of binary mixtures C(n)MpyNTf(2) ionic liquids with primary and secondary alcohols

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Noélia Calvar (Author) FEUP; Elena Gómez (Author) Other; Ángeles Domínguez (Author) Other; Eugénia A. Macedo (Author) FEUP

Journal

Title: Thermochimica Acta

Vol. 549

Pages: 49-56

ISSN: 0040-6031

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

ISI Web of Science

Scopus - 7 Citations

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences

Associated Projects

LA 20 - Projeto Estratégico-LA 20 - 2011-2012

Other information

Authenticus ID: P-002-2DD

DOI: 10.1016/j.tca.2012.09.009

Abstract (EN): In this paper, the osmotic and activity coefficients and vapor pressures of the binary mixtures containing the ionic liquids 1-ethyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, C(2)MpyNTf(2), and 1-methyl-3-propylpyridinium bis(trifluoromethylsulfonyl)imide, C(3)MpyNTf(2), with 1-propanol, or 2-propanol and the ionic liquid 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide. C(4)MpyNTf(2), with 1-propanol or 2-propanol or 1-butanol or 2-butanol were determined at T = 323.15 K using the vapor pressure osmometry technique. The influence of the structure of the alcohol and of the ionic liquid on both coefficients and vapor pressures is discussed and a comparison with literature data on binary mixtures containing ionic liquids with different cations and anion is also performed. Besides, the results have been interpreted in terms of solute-solvent and ion-ion interactions. The experimental osmotic coefficients were correlated using the Extended Pitzer model of Archer and the Modified Non-Random Two Liquids model obtaining standard deviations lower than 0.059 and 0.102 respectively, and the mean molal activity coefficients and the excess Gibbs free energy for the studied mixtures were calculated. (C) 2012 Published by Elsevier B.V.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8