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PVT Property Measurements for Ethyl Propionate, Ethyl Butyrate, and Ethyl Penta...
Costa, Henrique F.; Gardas, Ramesh L.; Johnson, Irudayaraj; Fonseca, Isabel M. A.; Ferreira, Abel G. M.The results of PVT measurements of the liquid phase within the temperature range (298 to 393) K and up to 35 MPa are presented for some aliphatic esters. Measurements were made by means of a vibrating tube densimeter, model DMA 512P from Anton Parr. The calibration of the densimeter was performed with water and n-heptane as reference fluids. The experimental PVT data have been correlated by a Tait equation. Thi...
Densities and Derived Thermodynamic Properties of Imidazolium-, Pyridinium-, Py...
Gardas, Ramesh L.; Costa, Henrique F.; Freire, Mara G.; Carvalho, Pedro J.; Marrucho, Isabel M.; Fonseca, Isabel M. A.; Ferreira, Abel G. M.In the present work, experimental density measurements are reported along with the derived thermodynamic properties, such as the isothermal compressibility (κT), the isobaric expansivity (αp), and the thermal pressure coefficient (γv) for imidazolium-, pyridinium-, pyrrolidinium-, and piperidinium-based ionic liquids (ILs), namely, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate [C2mim][CF3SO3], 3-methyl-...
Measurements and Correlation of High-Pressure Densities of Imidazolium-Based Io...
Tomé, Luciana I. N.; Carvalho, Pedro J.; Freire, Mara G.; Marrucho, Isabel M.; Fonseca, Isabel M. A.; Ferreira, Abel G. M.; Coutinho, João A. P.In the present work, experimental density measurements are reported along with the derived thermodynamic properties, such as the isothermal compressibility (κT), the isobaric expansivity (αp), and the thermal pressure coefficient (γv) for imidazolium-based ionic liquids (ILs), namely, 1-ethyl-3-methylimidazolium methylsulfate [C2mim][MeSO4], 1-ethyl-3-methylimidazolium ethylsulfate [C2mim][EtSO4], 1,3-diethylim...
High-Pressure Densities and Derived Thermodynamic Properties of Imidazolium-Bas...
Gardas, Ramesh L.; Freire, Mara G.; Carvalho, Pedro J.; Marrucho, Isabel M.; Fonseca, Isabel M. A.; Ferreira, Abel G. M.; Coutinho, João A. P.This work addresses the experimental measurements of the pressure (0.10 < p/MPa < 10.0) and temperature (293.15 < T/K < 393.15) dependence of the density and derived thermodynamic properties, such as the isothermal compressibility, the isobaric expansivity, the thermal pressure coefficient, and the pressure dependence of the heat capacity of several imidazolium-based ionic liquids (ILs), namely, 1-butyl-3-methy...
Viscosity and Density of Water + Ethyl Acetate + Ethanol Mixtures at 298.15 and...
Pires, Rui M.; Costa, Henrique F.; Ferreira, Abel G. M.; Fonseca, Isabel M. A.The viscosities and densities of the ternary mixtures water + ethyl acetate + ethanol and their constituent binaries have been measured at 298.15 and 318.15 K and atmospheric pressure. The excess molar volumes, , and viscosity deviations, Δη, were calculated from density and viscosity, respectively. A rational function due to Myers and Scott was used to describe the composition dependence of these properties. T...
PρT Measurements of Imidazolium-Based Ionic Liquids
Gardas, Ramesh L.; Freire, Mara G.; Carvalho, Pedro J.; Marrucho, Isabel M.; Fonseca, Isabel M. A.; Ferreira, Abel G. M.; Coutinho, João A. P.Experimental density measurements are reported, and the derived thermodynamic properties, such as the isothermal compressibility, the isobaric expansivity, and the thermal pressure coefficient are presented as Supporting Information for several imidazolium-based ionic liquids (ILs), namely, 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [C2mim][NTf2], 1-heptyl-3-methyl-imidazolium bis(trifluorom...
PVT Property Measurements for Some Aliphatic Esters from (298 to 393) K and up ...
Gardas, Ramesh L.; Johnson, Irudayaraj; Vaz, David M. D.; Fonseca, Isabel M. A.; Ferreira, Abel G. M.The results of PVT measurements of the liquid phase within the temperature range of (298 to 393) K and up to 35 MPa are presented for some aliphatic esters. Measurements were made by means of a vibrating-tube densimeter, model DMA 512P from Anton Parr. The calibration of the densimeter was performed with water and n-heptane as reference fluids. The experimental PVT data have been correlated by a Tait equation. ...
Densities, Viscosities, and Surface and Interfacial Tensions of the Ternary Mix...
Kijevcanin, Mirjana Lj.; Ribeiro, Inês S. A.; Ferreira, Abel G. M.; Fonseca, Isabel M. A.The excess molar volumes, VE, viscosity deviations, Δη, and excess surface tensions were calculated from the measured density, viscosity, and surface tension values, σ, over the whole miscibility composition range for the ternary system water + ethyl butyrate + methanol and their constituent binaries, at 303.15 K and atmospheric pressure. The liquid interfacial tension was measured in the liquid−liquid equilibr...
Phase equilibria from the exactly integrated Clapeyron equation
Lobo, Lélio Q.; Ferreira, Abel G. M.In this work, the exactly integrated form of the Clapeyron equation found by Mosselman et al. has been used in a systematic manner to derive a comprehensive set of equations describing the first-order transition curves of pure substances. The application of each of these equations requires the knowledge of only one (reference) point on the particular equilibrium line, of the corresponding enthalpy of transition...
Solubilities of some new refrigerants in water
Miguel, Alexandre A. F.; Ferreira, Abel G. M.; Fonseca, Isabel M. A.Solubility data for the refrigerants HFC23 (CHF3), HFC32 (CH2F2) and HFC125 (C2HF5) in water have been determined as a function of the temperature in the range of temperatures 288-303 K at atmospheric pressure. These hydrofluorocarbons (HFCs) are good substitutes of the chlorofluorocarbons (CFCs), which have significant impact to stratospheric ozone depletion. ; http://www.sciencedirect.com/science/article/B...
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