Viscosity measurements of liquid ethene plus ethane binary mixtures at temperatures from 173.150 K to 243.150 K and pressures up to 5.5 MPa

Liquid viscosity for the binary systems of {xC2H4 + (1 -x)C2H6} was measured by a vibrating-wire viscometer with three different mole fractions of x = 0.273, 0.521, and 0.757. Measurements were operated at eight iso-therms at temperatures from 173.150 K to 243.150 K and pressures up to 5.5 MPa. The combined relative standard uncertainty of the measured viscosity was about 2.6 %. The relative deviation from the experimental data and the calculations of the extended corresponding state (ECS) model implemented in REFPROP 10.0 was mainly within 5 % with the 10 % maximum. In addition, the Assael and Dymond scheme based on the hard -sphere theory was used to correlate the measured results, and the model is in good consistency with the experimental data with the relative deviations within 0.8 %.