The Viscosity of Carbon‐Monoxide and its Mixtures with Other Gases in the Temperature Range 25 – 200°C

The paper reports new, absolute measurements of the viscosity of carbon monoxide, nitrogen, of two of their binary mixtures, and of mixtures of carbon monoxide with helium, neon and argon. The measurements have been carried out in an oscillating disk viscometer at a pressure of 0.1 MPa in the temperature range 25 – 200°C. The accuracy of the absolute viscosities reported is estimated to lie between ±0.1 and ±0.2%. The measurements have been conducted in such a way that the ratios of the viscosity of carbon‐monoxide and its mixtures with nitrogen to that of pure nitrogen were determined directly with an uncertainty of no more than ±0.1%. The viscosity ratios are found to depart from unity by no more than this uncertainty over the entire temperature range studied. – The viscosity data for all of the systems studied have been correlated, within their experimental error, by means of the extended law of corresponding states. The experimental results have been employed to derive binary diffusion coefficients of the gas mixtures. In the particular cases of CO – He and CO – Ar, the experimental data have also been used to examine the kinetic theory description of the results of recent measurements of the thermal conductivity at low and moderate density and near room temperature.