Vapour–liquid equilibrium measurements and correlation of the difluoromethane (R32) + propane (R290) + 1,1,1,2,3,3,3-heptafluoropropane (R227ea) ternary mixture at temperatures from 269.85 to 328.35 K

Vapour–liquid equilibrium (VLE) data of the ternary mixture composed of difluoromethane (R32), propane (R290) and 1,1,1,2,3,3,3-heptafluoropropane (R227ea) have been measured for three compositions at temperatures between 269.85 and 328.35 K. The experimental method is a synthetic one with a variable volume cell. Our results about each of the three corresponding binary systems are compared to literature data using a Soave–Redlich–Kwong (SRK) equation of state with MHV1 mixing rules involving the NRTL model.