A novel technique for rapid liquid—vapour equilibrium measurement and modelling

✍ Scribed by Ph. Verneau; J. Lieto; A. Boudehen; J. Bousquet

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 553 KB
• Volume: 49
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(94)80058-8

✦ Synopsis

Abatsct

-The principles of an automated ebulliometer for fast binary vapour-liquid equilibrium data measurement are presented. The system is made of a thermostated 0.5 1 tank equipped wth a hollow shaft and a self-inducing turbine to ensure fast equilibration, sampling and analysis systems, and a microcomputer for commanding the different valves and sensors, recording and analysing experimental data. The automated feed system allows one to introduce successively in the tank, mixtures with known global compositions. A given mixture is subjected to a temperature program consisting of symmetrical upward and downward temperature paths. With a parameter estimation minimising a pressure criterion, the (P, 7', x) technique associated with a mass balance leads to liquid-vapour equilibrium modelling. The tests were performed with acetone-methanol and isopropanol-methanol mixtures. Good equilibrium data over the full range of composition in broad P and T domains can be gathered in a short period of time. JNTRODUCTION