Solubility of HFC32, HFC125, HFC134a, HFC143a, and HFC152a in a pentaerythritol tetrapentanoate ester

Solubilities of five different hydrofluorocarbons (HFCs) in a pentaerythrit ol tetrapentanoate ester (958 purity) have been measured at temperatures be tween 303.15 and 363.15 K and pressures between 0.05 and 1.9 MPa. Henry's c onstant and the activity coefficient for HFCs at infinite dilution were der ived for measurements below 0.26 MPa. The measurements were made with an is ochoric method with an uncertainty of less than 2% for Henry's constant and less than 3% at high pressure. Within the investigated temperature range, solubilities for HFCs decrease in the following order: HFC152a > HFC134a > HFC32 > HFC125 > HFC143a. The experimental data have been correlated with a Flory-Huggins model with an extended temperature dependence, which is able to describe the data with a deviation from measured data of less than 2%.