Osmotic coefficients of alcoholic mixtures containing BMpyrDCA: Experimental determination and correlation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

N. Calvar (Autor) FEUP; Á. Domínguez (Autor) Outra; E. A. Macedo (Autor) FEUP

Revista

Título: Journal of Chemical Thermodynamics

Vol. 72

Páginas: 9-15

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 7 Citações

ISI Web of Science

Scopus - 8 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas

Projetos Associados

LA 20 - PROJECTO ESTRATÉGICO - LA 20 - 2013-2014

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

Outras Informações

ID Authenticus: P-009-37N

DOI: 10.1016/j.jct.2013.12.002

Abstract (EN): The vapour pressure osmometry technique (VPO) has been used to obtain the osmotic coefficients of the binary mixtures of the primary and secondary alcohols 1-propanol, 2-propanol, 1-butanol, 2-butanol and 1-pentanol with the ionic liquid 1-butyl-1-methylpyrrolidinium dicyanamide, BMpyrDCA. From these coefficients, the corresponding activity coefficients and vapour pressures of the mixtures have been also determined. The results have been discussed in terms of solute-solvent and ion-ion interactions and have been compared with those taken from literature in order to analyse the influence of the anion or cation constituting the ionic liquid. For the treatment of the experimental data, the Extended Pitzer model of Archer and the MNRTL model have been applied, obtaining standard deviations from the experimental osmotic coefficients lower than 0.015 and 0.065, respectively. From the parameters obtained with the Extended Pitzer model or Archer, the mean molal activity coefficients and the excess Gibbs free energy for the studied mixtures have been calculated. (C) 2014 Published by Elsevier Ltd.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7