Isobaric Vapor–Liquid Equilibria for the Formic Acid–N-methyl-2-pyrrolidone Binary System at 50, 20, and 10 kPa and Modeling Using the NRTL-HOC and PC-SAFT Models

Isobaric vapor–liquid equilibrium (VLE) data for a binary system of formic acid and N-methyl-2-pyrrolidone were measured at 50, 20, and 10 kPa in a dynamic equilibrium cell. The VLE data were validated for their thermodynamic consistency by applying the Redlich–Kister area tests. Furthermore, the density data were determined using a densimeter over the entire concentration range. The experimental VLE data were then correlated using the nonrandom...