Volumetric properties of 2,5-dimethylfuran in mixtures with octane or dodecane from 293 K to 393 K and pressures up to 70 MPa

Abstract

We report isothermal volumetric properties for two binary systems constituted by 2,5-dimethylfuran (x)+a linear alkane (1−x); octane and dodecane are the representative alkanes. Compressed liquid densities were obtained via oscillating period measurements in two commercial vibrating U-shaped tube densimeters. The experiments were performed within the pressure and temperature intervals from 0.1MPa to 70MPa and from 293K to 393K, respectively. Properties for these binary systems were measured at x=(0.1154, 0.2999, 0.4967, 0.6962, 0.8924) for 2,5-dimethylfuran+octane mixtures; whereas, compositions measured for 2,5-dimethylfuran+dodecane mixtures were x=(0.1995, 0.4067, 0.4972, 0.6053, 0.8045). Experimental density data were correlated by using the Tammann-Tait equation. Thermodynamic derived properties were calculated from the same equation, and their dependence on pressure, temperature and composition was discussed. These properties were isobaric thermal expansivity, isothermal compressibility, thermal pressure coefficient, internal pressure and mixing molar volume.