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Advisor(s)
Abstract(s)
New viscosity measurements of compressed liquid diethylene glycol (DiEG), triethylene glycol (TriEG) and tetraethylene glycol (TeEG) have been performed using a vibrating wire instrument operated in the forced oscillation mode. The measurements have been carried out in a range of pressures up to 70 MPa and temperatures from (293-363) K, covering a total range of viscosities from (3.46-1.15 x 10(2)) mPa.s.
Complementary experimental density data were obtained for the same glycols using an Anton Paar vibrating U-tube densimeter. These measurements have been performed in a range of temperatures from about (283-363) K and at pressures up to about 70 MPa.
The viscosity results were correlated with density, using a modified hard-spheres scheme. The experimental density data were correlated, as a function of temperature and pressure, with a modified Tait-type equation.
The expanded uncertainty of the present viscosity results at a 95% confidence level is estimated to be less than +/- 2.0% for viscosities up to 68 mPa s and less than +/- 2.6% for higher viscosities. The densities have an expanded uncertainty of +/- 0.2% at a 95% confidence level. (C) 2018 Published by Elsevier B.V.
Description
Keywords
Ethylene glycol Viscosity Vibrating wire High pressure Viscosidade Fio de vibração Alta pressão
Citation
PEREIRA, Marta F. V.; [et al] – Viscosity of liquid diethylene, triethylene and tetraethylene glycols at moderately high pressures using a vibrating wire instrument. Fluid Phase Equilibria. ISSN 0378-3812. Vol. 480 (2019), pp. 87-97
Publisher
Elsevier