Application of sPC-SAFT-JC and sPC-SAFT-GV to Phase Equilibria Predictions of Alkane/Alcohol, Alcohol/Alcohol, and Water/Alcohol Binary Systems

This paper reports on the ability of sPC-SAFT extended with the polar terms of Gross and Vrabec (GV) and Jog and Chapman (JC) to predict the phase equilibria of alkane/alcohol, alcohol/alcohol, and water/alcohol binary systems. These non-hydrogen-bonding/hydrogen-bonding and hydrogen-bonding/hydrogen-bonding systems are investigated using the 2B, 3B, and the newly developed 2C association schemes for alcohols and the 4C scheme for water. For these selected binary systems, the GV and JC polar terms deliver similar results when incorporated into sPC-SAFT. Notably, the 2C association scheme offers improved predictions compared to the 2B and 3B association schemes, especially when water/alcohol systems are modeled.