Temperature dependence and structural influence on the thermophysical properties of eleven commercial ionic liquids

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Raquel G. Seoane (Autor) Outra; Sandra Corderí (Autor) Outra; Elena Gómez (Autor) Outra; Noélia Calvar (Autor) FEUP; Emilio J. González (Autor) FEUP; Eugénia A. Macedo (Autor) FEUP; Ángeles Domínguez (Autor) Outra

Revista

Título: Industrial & Engineering Chemistry Research

Vol. 51 Nº 5

Páginas: 2492-2504

ISSN: 0888-5885

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 107 Citações

ISI Web of Science

Scopus - 133 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas

Projetos Associados

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

Outras Informações

ID Authenticus: P-002-D32

DOI: 10.1021/ie2029255

Abstract (EN): Density, speed of sound, refractive index, and viscosity of the commercial ionic liquids 1-ethyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, [EMpy] [NTf2], 1-propyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, [PMpy][NTf2], 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, [BMpy][NTf2], 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [EMim][NTf2], 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [HMim] [NTf2], 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, [BMpyr] [NTf2], 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate, [BMpyr][TFO], 1-butyl-3-methylimidazolium trifluoromethanesulfonate, [BMim][TFO], 1-hexyl-3-methylimidazolium trifluoromethanesulfonate, [HMim][TFO], 1-butyl-3-methylimidazolium dicyanamide, [BMim] [N(CN)(2)], and 1-hexyl-3-methylimidazolium dicyanamide, [HMirn][N(CN)(2)] were measured as a function of temperature at atmospheric pressure. The density, speed of sound, and refractive index data were properly fitted to a linear equation, while viscosity data were fitted to Arrhenius-like law, Vogel-Fulcher-Tamrnan (VET), a modified VFT, Litovitz, and fluidity equations. Besides, from the experimental density values, the thermal expansion coefficient, a, was calculated. Moreover, the experimental data were used to analyze the effect of temperature, the role of the alky chain length of the cation, and the influence of the nature of the ions (cation and anion) on the physical properties. Finally, an exhaustive comparison with available literature data of the studied ionic liquids was also carried out.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13