Abstract
The high pressure phase behavior of two binary systems involving carbon dioxide and a solid (naphthalene or biphenyl) was experimentally investigated using a static method. The pressure-temperature projection of the three-phase (solid-liquid-gas) coexistence curve was determined by observing the initial appearance of the solid phase (the “first freezing point” method). The equilibrium liquid compositions along the three-phase coexistence curve were also determined. Liquid activity coefficients of naphthelene and biphenyl were estimated using their latent heats of fusion and correlated by means of the van Laar equation.
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