Study of the influence of the structure of the alcohol on vapor pressures and osmotic coefficients of binary mixtures alcohol + 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide at T = 323.15 K

• 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: Fluid Phase Equilibria

Vol. 313 No. 15 January 2012

Pages: 38-45

ISSN: 0378-3812

Publisher: Elsevier

Indexing

ISI Web of Knowledge

ISI Web of Science

Scopus

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences

Associated Projects

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

Other information

DOI: 10.1016/j.fluid.2011.09.037

Abstract (EN): The osmotic and activity coefficients and vapor pressures of binary mixtures containing the alcohols 1-propanol, 2-propanol, 1-butanol, 2-butanol and 1-pentanol and the ionic liquid 1-hexyl- 3-methylimidazolium bis(trifluoromethylsulfonyl)imide, C6MimNTf2, were determined at T = 323.15 K using the vapor pressure osmometry technique. The experimental osmotic coefficients were correlated using the Extended Pitzer model of Archer and the MNRTL model, obtaining standard deviations lower than 0.020 and 0.049, respectively. The mean molal activity coefficients and the excess Gibbs free energy for the studied mixtures were calculated from the parameters of the Extended Pitzer model of Archer. Besides the effect of the alkyl-chain of the alcohol and the position of the alcohol group, the effect of the alkyl-side chain of the cation of the ionic liquid can be assessed comparing the experimental results with those previously obtained for imidazolium bis(trifluoromethylsulfonyl)imide ionic liquids with different alkyl-side chain lengths.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8