(Vapour + liquid) equilibrium measurements and correlations of the refrigerant mixture {dimethyl ether (RE170) + 1,1,1,3,3,3-hexafluoropropane (R236fa)} at the temperatures (303.68 and 323.75) K

✍ Scribed by Sergio Bobbo; Roberto Camporese; Roman Stryjek

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 135 KB
• Volume: 30
• Category: Article
• ISSN: 0021-9614
• DOI: 10.1006/jcht.1998.0369

✦ Synopsis

Vapour q liquid equilibrium VLE data were measured for the refrigerant mixture Ä Ž . Ž . 4 dimethyl ether RE170 q 1,1,1,3,3,3-hexafluoropropane R236fa at the temperatures Ž . 303.68 and 323.75 K. The VLE data were obtained using forced recirculation of the vapour through the liquid by means of a magnetic pump. The composition of both phases was determined by gas chromatography. The experimental VLE data are regressed using the Carnahan᎐Starling᎐De Santis equation of state, which was chosen for its ability to represent the volumetric properties along bubble and dew point curves. The experimental data show negative deviations from Raoult's law that can be attributed to hydrogen bonding between Ž . Ž oxygen in RE170 proton acceptor and hydrogen evidently a proton donor, judging from our . measurements in R236fa. VLE data of the studied system are not available elsewhere in the literature.