Volumetric properties for {(1 –x)CO2+xCH4},{(1 −x)CO2+xN2}, and {(1 −x)CH4+xN2} at the preessures (19.94, 29.94, 39.94, 59.93, 79.93, and 99.93) MPa and the temperature 673.15 K

Abstract Densities ρ of pure CO 2 , CH 4 , and {(1 − x )CO 2 + x CH 4 }, {(1 − x )CO 2 + x N 2 } and {(1 − x )CH 4 + x N 2 } were measured at the pressures (19.94, 29.94, 39.94, 59.93, 79.93, and 99.93) MPa and T = 673.15 K. The measurements were made with a custom-designed, high-pressure, high-temperature vibrating-tube densimeter. For each binary system, results were obtained at mole fraction intervals of 0.1· x from x = 0 to x = 1. Excess molar volumes V m E were calculated from the measured densities for the end members and mixtures.