(204c) Density and Derived Properties of Binary Mixtures Containing {Dimethyl Carbonate (DMC) + 1-Propanol} at T = (288.15 to 308.15) K and at P = (0.1 to 40) Mpa

Excess properties have been a qualitative and quantitative way to predict deviation from ideality of binary liquid solution. Moreover, excess properties have been used to develop models and propose new solution theories. As a continuation of an experimental study and modeling of excess molar properties of binary systems containing alcohols [1-2], in the present work, experimental data of density of binary liquid mixtures containing {dimethyl carbonate (DMC) + 1-propanol have been determined over the entire composition range, at temperatures from (288.15 to 308.15) K and at pressure range between (0.1 and 40) MPa. Density measurements of pure components and their respective solutions were determined by using a vibration-tube densimeter (Model DMA 4500) coupled with a high-pressure cell (DMA HP), both manufactured by Anton Paar. The results of densities were used to calculate excess molar volume and other volumetric properties, such as partial molar volume, excess partial molar volume and respective partial molar volume at infinite dilution, and apparent molar volume of each compound. Density data were also fit to Tait equation and used to determine the isothermal compressibility and the thermal expansion coefficient. The excess molar volume values were positive for the system studied. It was possible to observe that the absolute values of the excess molar volume decrease with increasing in pressure and increase with increasing in temperature. In order to complement the thermodynamic analysis and understand the possible interactions between the components present in the mixtures, Fourier Transformed Infrared (FT-IR) spectroscopy study was realized. The results were interpreted in terms of intermolecular interactions and structural effects between the components present in the systems. The thermodynamic and spectroscopic results suggest that the structural effects and dispersion forces must outweigh other possible effects present in the mixtures studied. For the best of our knowledge, no data of volumetric properties at high-pressure for the systems studied in this work were found in the literature.

References

[1] S.S. Bittencourt, H.E. Hoga R.B. Torres, J.V.H. d´Angelo. Thermodynamic and spectroscopic properties of binary mixtures of n-butylammonium butanoate ionic liquid with alcohols at T = (293.15 to 313.15) K. Journal of Chemical Thermodynamics, 2017. 105: p. 238-252.

[2] H.E. Hoga R.B. Torres. 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. Journal of Chemical Thermodynamics, 2011. 43: p. 1104-1134.