Isothermal vaporliquid equilibria (VLE) for the binary systems of difluoro-methane (HFC-32)+1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and penta-fluoroethane (HFC-125)+1,1,1,2,3,3-hexafluoropropane (HFC-236ea) were measured at 288.6, 303.2, and 318.2 K using an apparatus in which the vapor phase was recirculated through the liquid. The phase composition at equilibrium was measured by gas chromatography, based on calibration using gravimetrically prepared mixtures. Both systems show a slight deviation from Raoult's law. The uncertainties in pressure, temperature, and vapor- and liquid-phase composition measurements were estimated to be no more than +/-1 kPa, +/-0.02 K, and +/-0.002 mol fraction, respectively. The data were analyzed using the CarnahanStarlingDeSantis equation of state.

Vapor + liquid equilibrium measurements and correlation of the refrigerant mixtures Difluoromethane (HFC-32) +, and Pentafluoroethane (HFC-125) + 1,1,1,2,3,3-Hexafluoropropane (HFC-236ea) at 288.6, 303.2 and 318.2 K

S Bobbo;L Fedele;M Scattolini;R Camporese
2000

Abstract

Isothermal vaporliquid equilibria (VLE) for the binary systems of difluoro-methane (HFC-32)+1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and penta-fluoroethane (HFC-125)+1,1,1,2,3,3-hexafluoropropane (HFC-236ea) were measured at 288.6, 303.2, and 318.2 K using an apparatus in which the vapor phase was recirculated through the liquid. The phase composition at equilibrium was measured by gas chromatography, based on calibration using gravimetrically prepared mixtures. Both systems show a slight deviation from Raoult's law. The uncertainties in pressure, temperature, and vapor- and liquid-phase composition measurements were estimated to be no more than +/-1 kPa, +/-0.02 K, and +/-0.002 mol fraction, respectively. The data were analyzed using the CarnahanStarlingDeSantis equation of state.
2000
Carnahan-Starling-DeSantis equation of state
HFC-125+HFC-236ea
HFC-32+HFC-236ea
isothermal vapor liquid equilibrium
vapor pressures
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/200114
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