Engenharia Química
URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/25
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4 resultados
Resultados da Pesquisa
- Volumetric behaviour of binary mixtures of (trichloromethane + amines) at temperatures between T = (288.15 and 303.15) K at p = 0.1 MPa(2008) Magalhaes J.G.; Torres R.B.; Volpe P.L.O.In this work, densities of binary mixtures of {trichloromethane (TCM) + n-butylamine (n-BA), or + s-butylamine (s-BA), or + diethylamine (DEA), or + triethylamine (TEA)} have been determined under atmospheric pressure as a function of composition and temperature using a vibrating-tube densimeter. The temperatures studied were T = (288.15, 293.15, 298.15, and 303.15) K. The excess molar volumes (VmE), calculated from density data are negative for all studied systems and the negative deviations follow the sequence: TEA > DEA > s-BA > n-BA. Negative values of VmE for binary mixtures were attributed to the formation of hydrogen bonding and of a charge transfer complex between TCM and amines and to structural effects. The partial molar volumes at infinite dilution of each component (over(V, -)ioo) have been determined using three different methods. © 2008 Elsevier Ltd. All rights reserved.
- Volumetric properties of binary mixtures of dichloromethane and amines at several temperatures and p = 0.1 MPa(2008) Torres R.B.; Hoga H.E.In this work densities of binary mixtures of {dichloromethane (DCM) + n-butylamine (n-BA), or + s-butylamine (s-BA), or + t-butylamine (t-BA), or diethylamine (DEA), or + triethylamine (TEA)}, have been determined under atmospheric pressure as a function of composition and temperature using a vibrating-tube densimeter. The temperatures studied were T = 288.15, 293.15, 298.15 and 303.15 K. The excess molar volumes (VmE), calculated from density data, are negative for the (DCM + t-BA, or + DEA, or + TEA) mixtures and present a sigmoid curve for the (dichloromethane + n-BA, or + s-BA) mixtures. The partial molar volumes at infinite dilution of each component (V{combining overline}i∞) have been determined using three different methods. © 2008 Elsevier B.V. All rights reserved.
- Volumetric properties of binary mixtures of (acetonitrile + amines) at several temperatures with application of the ERAS model(2016) Bittencourt S.S.; Torres R.B.© 2015 Elsevier Ltd. All rights reserved.Densities of binary mixtures of {acetonitrile + n-propylamine, or + n-butylamine, or + di-n-propylamine, or + di-n-butylamine, or + t-butylamine, or + triethylamine} at T = (293.15, 298.15, 303.15 and 308.15) K and atmospheric pressure are reported over the whole composition range. A vibrating-tube densimeter was used to determine the densities. The excess molar volume, VmE, was calculated from these results and correlated to the Redlich-Kister equation. The VmE values were negative for all the studied systems, except for the (acetonitrile + di-n-butylamine) binary mixtures which presented sigmoid behavior with positive values at high acetonitrile concentration. The partial molar volumes at infinite dilution of each component have been determined using three different methods. The VmE experimental results were also used to test the applicability of the Extended Real Association Solution model (ERAS model).
- Volumetric properties of chloroalkanes + amines mixtures: Theoretical analysis using theERAS-Model(2009) Torres R.B.; Hoga H.E.; Magalhaes J.G.; Volpe P.L.O.In this study, experimental data of excess molar volumes of {dichloromethane (DCM), or trichloromethane (TCM) + n-butylamine (n-BA), or +s-butylamine (s-BA), or +t-butylamine (t-BA), or +diethylamine (DEA), or +triethylamine (TEA)} mixtures as a function of composition have been used to test the applicability of the extended real associated solution model (ERAS-Model). The values of the excess molar volume were negative for (DCM + t-BA, or +DEA, or +TEA and TCM + n-BA, or +s-BA, or +DEA, or +TEA) mixtures and present sigmoid curves for (DCM + n-BA, or +s-BA) mixtures over the complete mole-fraction range. The agreement between theoretical and experimental results is discussed in terms of cross-association between the components present in the mixtures. © 2009 Springer Science+Business Media, LLC.