Compressed Liquid Densities of 1-Pentanol and 2-Pentanol from 313 to 363 K at Pressures to 25 MPa

Abstract

Compressed liquid densities of 1-pentanol and 2-pentanol have been measured from 313 to 363 K at pressures to 25 MPa. Measurements have been achieved using a vibrating tube densimeter. Water and nitrogen are the reference fluids to calibrate the densimeter. Measurements uncertainties are estimated to be ±0.03 K for temperatures, ±0.008 MPa for pressures and ±0.20 kg·m −3 for densities. Two volume-explicit equations with five and six parameters and the 11-parameter BWRS equation of state are used to correlate the experimental densities of 1-pentanol and 2-pentanol reported in this work. Statistical values for the evaluation of the correlations are reported. Comparisons with literature data are performed for the temperature and pressure ranges of the measurements.

Liquid density of 1-pentanol at pressures up to 140MPa and from 293.15 to 403.15K

“…The database for thermophysical properties of this compound, at present, is scarce and limited. Notice that in [1] the uncertainty is 0.2 kg m −3 (i.e. around 0.02%) but with narrow pressure interval (up to 25 MPa) and in the recent studies [9,10] the pressure interval is up to around 200 MPa but the uncertainty is only of the order of 0.4% (i.e.…”

“…In a recent article (Zuñiga-Moreno et al, [1]) it has been underlined that accurate PVT properties of pure compounds are required to develop and test Equation of states (EoS). The authors stressed that the evaluation of experimental properties data has become of high importance in the scientific community.…”

“…More particularly, the authors [1] made new measurements concerning densities of 1-pentanol. Nevertheless these new measurements have been restricted to pressure equal to or lower than 25 MPa, in a narrow temperature interval, from 313.1 to 362.5 K. To extend this previous work, in order to give more information about 1-pentanol density we present here results obtained up to 140 MPa from 293.15 to 403.15 K, with an uncertainty of around 0.05% (i.e.…”

“…Liquid densities for 1-pentanol at high pressure have been measured by [1], Bridgman [2], Walsh and Rice [3], Sahli et al [4], Gylmanov et al [5], Zolin et al [6], Altunin and Konikevich [7], Garg et al [8], Wappman et al [9], Sulzner and Luft [10]. The number of data points, range of temperature and pressure, compound purity, and the claimed uncertainty for the data reported by mentioned references are presented in Table 1.…”

“…Notice that Table 1 is similar to the part concerning 1-pentanol of Table 1 in ref. [1], which authors have made a complete bibliographic analysis on the subject (high pressure density of 1-pentanol and 2-pentanol) except the fact that measurements of [1] about 1-pentanol have been added in the last row. As we can see the review of the currently available literature sources reveals that there is still a lack of information on the density of 1-pentanol.…”