Experimental Investigations of Impurity Impact on CO₂ Mixture Phase Equilibria

A facility designed for precise measurements of phase equilibria of CO₂-rich mixtures relevant for CCS conditioning and transport is demonstrated. The setup aims for high accuracy in pressure, temperature, and composition measurements for pressures between 4 and 200 bar and temperatures between -60 and 150 °C.

In this paper, the test measurement of the N2 / CO₂ system in the vicinity of the critical point for CO₂, have shown the ability to produce measurements with the high accuracy and repeatability in temperature, pressure and composition