Experimental pressure-temperature data on three- and four-phase equilibria of fluid, hydrate, and ice phases in the system carbon dioxide-water

Pressure-temperature data of three-phase lines, quadruple points, and critical end points of the binary system carbon dioxide-water were taken in a high-pressure view cell at temperatures between 270 and 305 K and pressures up to 7.4 MPa. The phase equilibria involve both fluid (liquid and vapor) phases and solid phases (hydrate and ice). The present results are in good agreement with most data from the literature. Correlations of the experimental data with Clausius-Clapeyron type equations are given. The literature data are reviewed critically in comparison to the correlations. The global phase behavior of the system carbon dioxide-water is discussed and compared to the phase behavior of similar binary systems.