Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

New measurements of compressed liquid density, viscosity, and bubble pressures of mixtures of carbon dioxide and squalane are reported for CO2 mole fractions x = (0.199, 0.299, and 0.519) at temperatures (313, 338, and 363) K, and pressures from bubble points up to about 77 MPa. Density was measured using a `bare-bone' vibrating U-tube driven and scanned in frequency domain with a lock-in amplifier where the resonance peak is acquired in complex form and density is determined with an expanded uncertainty of U()=0.003. Viscosity was measured with a custommade capillary viscometer made of a stainless steel 1/8 inch tube with a length of about 3 m and an internal diameter of about 0.4 mm, where the pressure drop is measured while the fluid mixture is swept through at a constant flowrate. Bubble pressures were determined from the discontinuity of p-V plots recorded during a series of isothermal constant composition expansion processes (CCE) in a variable volume pressure cell. The data reported in previous literature were modeled using Tait-like equations for each single composition, but in this work, equations of state and the