Measurement and modeling of osmotic coefficients of binary mixtures (alcohol+1,3-dimethylpyridinium methylsulfate) at T=323.15K

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Elena Gómez (Autor) FEUP; Noélia Calvar (Autor) FEUP; Ángeles Domínguez (Autor) Outra; Eugénia A. Macedo (Autor) FEUP

Revista

Título: Journal of Chemical Thermodynamics

Vol. 43 Nº 6

Páginas: 908-913

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 13 Citações

ISI Web of Science

Scopus - 15 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas

Projetos Associados

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

Outras Informações

ID Authenticus: P-002-RAM

DOI: 10.1016/j.jct.2011.01.010

Abstract (EN): Measurement of osmotic coefficients of binary mixtures containing several primary and secondary alcohols (1-propanol, 2-propanol, 1-butanol, 2-butanol, and 1-pentanol) and the pyridinium-based ionic liquid 1,3-dimethylpyridinium methylsulfate were performed at T=323.15 K using the vapor pressure osmometry technique, and from experimental data, vapor pressure, and activity coefficients were determined. The extended Pitzer model modified by Archer, and the NRTL model modified by Jaretun and Aly (MNRTL) were used to correlate the experimental osmotic coefficients, obtaining standard deviations lower than 0.017 and 0.054, respectively. From the parameters obtained with the extended Pitzer model modified by Archer, the mean molal activity coefficients and the excess Gibbs free energy for the studied binary mixtures were calculated. The effect of the cation is studied comparing the experimental results with those obtained for the ionic liquid 1,3-dimethylimidazolium methylsulfate.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6