Physical and excess properties for binary systems containing an alcohol and ionic liquid at T = 298.15 K

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2012

Autores

Eugénia A. Macedo (Autor) FEUP; E. J. González (Autor) FEUP; N. Calvar (Autor) FEUP; P. Fernández (Autor) Outra; A. Domínguez (Autor) Outra

Ata de Conferência Internacional

Título: CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference PRES

Páginas: 1383-1389

20th International Congress of Chemical and Process Engineering, CHISA 2012 and 15th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2012

Prague, 25 August 2012 through 29 August 2012

Indexação

ISI Proceedings

ISI Web of Science

Scopus - 0 Citações

Classificação Científica

CORDIS: Ciências Tecnológicas

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-008-9TK

DOI: 10.1016/j.proeng.2012.07.531

Abstract (EN): The density, speed of sound, and refractive index for binary systems containing ethanol, or 1-propanol, or 2-propanol mixed with the ionic liquids 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide or 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide were measured at 298.15 K and 1 atm. From the experimental data, excess molar volumes (VE), excess molar isentropic compressibility (KS,m/E), and excess refractive index (nD/E) were calculated and fitted using a Redlich-Kister type equation. The VE for the studied systems presented asymmetrical curves that changed sign along the composition range, which were quite common in mixtures containing two components with a large molar volume difference. The values of VE showed a maximum at low concentrations of alcohol and a minimum around x1 = 0.9, which became more negative as the chain length of the alcohol decreased. The studied systems showed negative KS,m/E values in the whole composition range. The binary system containing ethanol presented a minimum at x1 ¿ 0.8, while the other two systems showed a minimum at x1 ¿ 0.7. nD/E curves were also asymmetrical showing a minimum at low concentrations of alcohol and a maximum at high molar fractions of alcohol. This is an abstract of a paper presented at the CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (Prague, Czech Republic 8/25-29/2012).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7