Viscosities and densities of different alcohols (1-propanol, 2-propanol, 1-pentanol and 2-pentanol) at high pressures
Alejandro Moreau, Manuel Sobrino, Johnny Zambrano, José J. Segovia, Miguel A. Villamañán, M. Carmen Martín
Abstract
High pressure viscosity data are necessary to complement fluid characterization, but their accurate determination is always a challenge due to the lack of these data. This work focuses on characterizing four alcohols (1-propanol, 2-propanol, 1-pentanol and 2-pentanol) through viscosity measurements using two different equipment: a falling body viscometer and a vibrating wire viscometer. Both techniques can measure up to 100 MPa, with relative expanded uncertainties (k = 2) of 3.5% and 1.5%, respectively. Since both viscometers need, as an input data, density of the measured compounds, a vibrating tube Anton Paar DMA-HPM densimeter is used to determine their densities in the same ranges of pressure and temperature with an expanded uncertainty (k = 2) of 0.70 kg·m−3. Finally, the experimental data are fitted to Tammann-Tait equation for densities and VFT model for viscosities obtaining standard deviations within the uncertainty of the measurements.