Engenharia Química
URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/25
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3 resultados
Resultados da Pesquisa
- Thermodynamic and spectroscopic properties of binary mixtures of n-butylammonium butanoate ionic liquid with alcohols at T = (293.15–313.15) K(2017) Bittencourt S.S.; Hoga H.E.; Torres R.B.; d'Angelo J.V.H.© 2016 Elsevier LtdIn this work, density and speed of sound of binary mixtures of {n-butylammonium butanoate ionic liquid (N4Bu) + alcohols (methanol, ethanol, 1-propanol, 1-butanol and 1-pentanol)} have been measured as a function of composition at T = (293.15–313.15) K and atmospheric pressure. The results were used to calculate the excess molar volume, VmE, and deviation in isentropic compressibility, ΔκS, and correlated to the Redlich-Kister polynomial equation. N4Bu was synthesized by the method of acid-base neutralization reaction using n-butylamine and butanoic acid, and characterized using 1H NMR, 13C NMR and FTIR spectroscopy techniques. For all systems studied, the values of excess molar volumes and deviations in isentropic compressibility were negative over the entire composition range. The results obtained were discussed in terms of structural effects and intermolecular interactions between like and unlike molecules.
- Volumetric and viscometric properties of binary mixtures of {methyl tert-butyl ether (MTBE) + alcohol} at several temperatures and p = 0.1 MPa: Experimental results and application of the ERAS model(2011) Hoga H.E.; Torres R.B.Densities and viscosities of binary mixtures of {methyl tert-butyl ether (MTBE) + methanol, or +ethanol, or +1-propanol, or +2-propanol, or +1-butanol, or +1-pentanol, or +1-hexanol} have been determined as a function of composition at several temperatures and atmospheric pressure. The temperatures studied were (293.15, 298.15, 303.15, and 308.15) K. The experimental results have been used to calculate the excess molar volume (VmE) and viscosity deviation (Δη). Both VmE and Δη values were negative over the entire range of mole fraction for all temperatures and systems studied. Moreover, the VmE values have been used to test the applicability of the Extended Real Associated Solution (ERAS) model. © 2011 Elsevier Ltd. All rights reserved.
- Thermodynamic and spectroscopic study of binary mixtures of n-butylammonium oleate ionic liquid + alcohol at T = 288.15–308.15 K(2018) Olivieri G.V.; da Cunha C.S.; dos Santos Martins L.; Paegle P.A.M.; Nuncio S.D.; de Araujo Morandim-Giannetti A.; Torres R.B.© 2017, Akadémiai Kiadó, Budapest, Hungary.In this study, experimental data of density and speed of sound have been measured for binary liquid mixtures containing {n-butylammonium oleate (N4Ol) ionic liquid + 1-propanol, or + 1-butanol, or + 1-pentanol, or + 1-hexanol}, over the entire range of composition at temperatures from T = 288.15–308.15 K and atmospheric pressure. Excess molar volume, VmE, and deviation in isentropic compressibility, Δκ, were calculated using the experimental data and were fit to a Redlich–Kister type polynomial. In order to elucidate possible intermolecular interactions between the chemical species present in solution, FT-IR and 1H-NMR spectroscopic analyses were carried out. The results for all systems studied suggest that structural effects and dispersion-type interactions must predominate other possible effects.