Reference Correlation for the Viscosity of Ethanol from the Triple Point to 620 K and Pressures up to 102 MPa

Abstract

We present a wide-ranging correlation expressed in terms of temperature and density for the viscosity of ethanol based on critically evaluated experimental data. The correlation is designed to be used with an existing equation of state from the triple point (159 K) to 620 K and at pressures up to 102 MPa. Comparisons with experimental data indicate the estimated uncertainty of the correlation is 4.2 % (at the 95% confidence level) for the liquid and supercritical phase at pressures up to 102 MPa, and 2% in the gas phase. Furthermore, for calculating viscosity values at 0.1 MPa, an additional correlation is proposed, valid from the triple point to the boiling point with an estimated uncertainty of 2.3 % (at the 95% confidence level).