Thermophysical Properties of Mixtures Containing Cholinium l-Alaninate and Water, Ethanol, or Propan-1-ol

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

Velho, P (Autor) Outra; Berta Nogueiro Estevinho (Autor) FEUP; Maria Eugénia Macedo (Autor) FEUP

Revista

Título: Journal of Chemical & Engineering Data

ISSN: 0021-9568

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 3 Citações

Outras Informações

ID Authenticus: P-00Y-WY5

DOI: 10.1021/acs.jced.3c00247

Abstract (EN): Choline amino acid ionic liquids (CAAILs) provide a greeneralternativeto classical ionic liquids, such as the ones based on imidazoliumcations, since they can be obtained from natural sources with largerbiodegradability. Given that most industrial extractions are performedin either aqueous or alcoholic media, the thermophysical characterizationof binary mixtures containing these solvents is very important forprocess design. In this work, the influences of the mole fractionof ionic liquid and of temperature on the thermophysical propertiesof binary mixtures containing water, ethanol, or propan-1-ol and cholinium l-alaninate ([Ch][Ala]), a well-known CAAIL, were studied. Dynamicviscosity, shear stress, torque (T = 288.15 -308.15 K), electrical conductivity (T = 298.15 K),and density (T = 293.15, 298.15, 303.15 K) were measuredat 0.1 MPa, and the corresponding excess volumes were calculated andfitted to a Redlich-Kister (RK) equation. Moreover, the effectof temperature on density (T = 288.15 - 323.15K), dynamic viscosity (T = 288.15 - 323.15K), and refractive index (T = 288.15 - 343.15K) of the synthesized [Ch][Ala] was also evaluated and compared withliterature. Dynamic viscosities of the pure components were determinedand fitted using the Vogel-Fulcher-Tammann-Hesse(VFTH) equation.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10