Authors: I M Abdulagatov A Tekin J Safarov A Shahverdiyev E Hassel
Publish Date: 2008/04/10
Volume: 37, Issue: 6, Pages: 801-833
Abstract
The density of five 002297 008317 026147 049343 075255 mole fraction BMIMPF6 binary methanol + BMIMPF6 1nbutyl3methylimidazolium hexafluorophospate mixtures have been measured with a vibratingtube densimeter Measurements were performed at temperatures from 298 to 398 K and at pressures up to 40 MPa The total uncertainties of the density temperature pressure and concentration mole fractions measurements were estimated to be less than 01 kg⋅m−3 15 mK 5 kPa and 10−4 respectively The uncertainties reported in this paper are expanded uncertainties at the 95 confidence level with a coverage factor of k=2 The measured densities were used to study of the effect of temperature pressure and concentration on the derived volumetric properties such as excess apparent and partial molar volumes It is shown that the values of excess molar volume for methanol + BMIMPF6 mixtures are negative at all measured temperatures and pressures in the whole concentration range The measured densities were used to develop Taittype equations of state for pure components and the mixtures The structural properties such as direct and total correlation function integrals were calculated using the derived partial molar volumes at infinite dilution
Keywords: