Isothermal phase (vapour+liquid) equilibrium data for binary mixtures of propene (R1270) with either 1,1,2,3,3,3-hexafluoro-1-propene (R1216) or 2,2,3-trifluoro-3-(trifluoromethyl)oxirane in the temperature range of (279 to 318)K

Abstract

Isothermal phase (vapour + liquid) equilibrium data for binary mixtures of propene (R1270) with either 1,1,2,3,3,3-hexafluoro-1-propene (R1216) or 2,2,3-trifluoro-3-(trifluoromethyl)oxirane in the temperature range of (279 to 318) K a b s t r a c t Isothermal (vapour + liquid) equilibrium data (P-x-y) are presented for the 1-propene 1,1,2,3,3,3-hexafluoro-1-propene and the 1-propene + 2,2,3-trifluoro-3-(trifluoromethyl)oxirane binary systems. Both binary systems were studied at five temperatures, ranging from (279.36 to 318.09) K, at pressures up to 2 MPa. The experimental (vapour + liquid) equilibrium data were measured using an apparatus based on the ''(static + analytic)'' method incorporating a single movable Rapid On-Line Sampler-Injector to sample the liquid and vapour phases at equilibrium. The expanded uncertainties are approximated on average as T = 0.07 K, 0.008 MPa, and 0.007 and 0.009 for the temperature, pressure, and the liquid and vapour mole fractions, respectively. A homogenous maximum-pressure azeotrope was observed for both binary systems at all temperatures studied. The experimental data were correlated with the Peng-Robinson equation of state using the Mathias-Copeman alpha function, paired with the Wong-Sandler mixing rule and the Non-Random Two Liquid activity coefficient model. The model provided satisfactory representation of the phase equilibrium data measured.

Vapor–Liquid Equilibrium for the Binary Systems 1,1,2,3,3,3-Hexafluoro-1-propene (R1216) + 2,3,3,3-Tetrafluoroprop-1-ene (R1234yf) and 1,1,2,3,3,3-Hexafluoro-1-propene (R1216) + trans-1,3,3,3-Tetrafluoropropene (R1234ze(E))

“…1,1,2,3,3,3-Hexafluoro-1-propene (FO-1216 or R1216), a perfluorocarbon, is eco-friendly (GWP < 1, lifetime ≈ 4.9 days) and nonflammable. The mixtures of R1216 with low molecular weight hydrocarbons were proposed as promising mixed-refrigerants comparable to R22 and R134a, and the VLE characteristics of R1216 + R1270, R1216 + R170, , R1216 + R290, and R1216 + R600, etc., were developed. Also, low-GWP, nonflammable or slightly flammable mixed-refrigerants by mixing R1216 with some HFOs were proposed by Yotsumoto et al, and these mixed-refrigerants had an equal or greater refrigeration capacity and/or coefficient of performance compared to that of R134a, R410A, R123, and R404A.…”