Phase Equilibrium Measurements and Modeling of 1-propanethiol + 1-butanethiol + CH4 in Methane + Water Ternary Systems at 303, 336, and 365 K and Pressure Up to 9 MPa

Abstract : New vapor-liquid equilibrium (VLE) data for 1-propanethiol + 1-butanethiol + CH4 ternary system is reported. Measurements were performed at three different temperatures (303, 336 and 368 K), while the pressure was ranged from1 to 9 MPa. The total system pressure was maintained by CH4. The inlet mole fraction of 1-propanethiol (x = 5.43  10-1) and 1n-butanethiol (x = 4.56  10-1) in the liquid phase were same in all experiments. A static analytic method was used for performing phase equilibrium measurements. The new VLE data have been modeled successfully with Cubic-Plus-Association (CPA) EoS.