Crossover SAFT equation of state and thermodynamic properties of propan-1-ol

In this work we have developed a nea; equation of state (EOS;) for propan-1 -ol on the basis of the crossover modification (CR) of the statistical-asso ciating-fluid-theory (SAFT) EOS recently developed and applied to n-alkanes . The CR SAFT EOS reproduces the nonanalytical scaling laws in the asymptot ic critical region and reduces to the analytical-classical SAFT EOS far av; av from the critical paint. Unlike the previous crossover EOS, the new CR S AFT EOS is based on the parametric sine model for tile universal crossover function and is able to represent analytically connected van der Waals loop s in the metastable fluid region. The CR SAFT EOS contains 10 system-depend ent parameters and allows an accurate representation of the thermodynamic p roperties of propan-1-ol over a wide range thermodynamic states including t he asymptotic singular behavior in the nearest vicinity of the critical pai nt. The EOS was tested against experimental isochoric and isobaric specific heats, speed of sound, PVT, and VLE data in and beyond the critical region . Tn the one-phase region, the CR SAFT equation represents the experimental values of pressure with an average absolute deviation (AAD) of less than 1 % in the critical and supercritical regions and the liquid densities with a n AAD of about 1%. A corresponding states principle is used for the extensi on of the new CR SAFT EOS for propan-1-ol to higher n-alkanols.