Excess enthalpies for pseudobinary mixtures containing vegetable oils at the temperatures 298.15 K, 353.15 K and 383.15 K

Abstract

This paper presents excess enthalpies for the following systems containing refined vegetable oils: soybean oil+methanol (at 353.15K/722kPa), soybean oil+ethanol (at 353.15K/687kPa and 383.15K/653kPa), soybean oil+n-hexane (at 353.15K/722kPa and 383.15K/756kPa), soybean oil+propan-2-ol (at 298.15K/998kPa), sunflower oil+methanol (at 353.15K/791kPa), sunflower oil+ethanol (at 353.15K/894kPa and 383.15K/860kPa), sunflower oil+n-hexane (at 353.15K/756kPa and 383.15K/894kPa), sunflower oil+propan-2-ol (at 298.15K/929kPa), rapeseed oil+methanol (at 353.15K/963kPa), rapeseed oil+ethanol (at 353.15K/998kPa and 383.15K/1136kPa), and rapeseed oil+n-hexane (at 353.15K/894kPa and 383.15K/1136kPa). The measurements were carried out with a commercially available isothermal flow calorimeter. The experimental HE values have been correlated using the Redlich-Kister polynomial equation. The results for systems with propan-2-ol and some values of partial molar excess enthalpies at infinite dilution, HiE,∞, obtained in this study have been compared to those available in the literature. The results were also discussed in terms of molecular interactions.