Solubilities of sulfuryl fluoride in propylene carbonate, tributyl phosphate and N-methylpyrrolidone

The solubilities of sulfuryl fluoride (SO2F2) in propylene carbonate (PC), tributyl phosphate (TBP) and N-methylpyrrolidone (NMP) was measured by isochoric saturation method at the pressure of up to 600 kPa and temperatures ranging from (293.15 to 313.15) K. Results showed that SO2F2 solubility increased with increasing pressure and decreased with increasing temperature in the three solvents, and the dissolution of SO2F2 in the solvents was a physical process. Moreover, Henry's law constants and thermodynamic properties such as standard Gibbs free energy, enthalpy, and entropy changes of SO2F2 solvation were further calculated according to the experimental solubility data. The solubility of SO2F2 in these three solvents followed the order of TBP > PC > NMP. The results illustrated that TBP possessed the potentiality to capture SO2F2 among the present absorbents due to the relatively large solubility and low absorption enthalpy for SO2F2.