A New Capillary Viscometer for Measurements up to 40 Mpa and 473 K: Preliminary Results for Pure Compounds up to 29 Mpa and 300 K

Abstract

In this work, preliminary results of viscosity for ethanol and CO₂ are presented. The viscosity have been measured with a new capillary viscometer designed and built to operate at pressures up to 40 MPa and temperatures up to 473.15 K. The viscosity was measured at pressures up to 29 MPa and temperatures up to 300 K. The total uncertainties of the viscosity results were estimated to be less than 1%. Experimental improvements of this new apparatus are carrying out in order to have uncertainty in viscosity less than 0.2 %. The experimental viscosities were compared with data, predictions and correlations previously reported in the literature with a maximum deviation of 1%.