Autor(es): Carrera, Gonçalo V. S. M. ; Visak, Zoran P. ; Lukasik, Rafal M. ; Ponte, Manuel Nunes
Data: 2018
Identificador Persistente: http://hdl.handle.net/10400.9/3123
Origem: Repositório do LNEG
Assunto(s): Supercritical carbon dioxide; Glycerol; Liquid-liquid equilibrium
ABSTRACT: The phase behaviour of the system CO2+methanol+glycerol has been studied at low concentrations of this trialcohol. The synthetic method was implemented in a visual sapphire cell. New phase diagrams were obtained at temperatures of 313.15 and 333.15 K. Different methanol/glycerol molar ratios of 113, 50 and 30 were considered and its influence on phase behaviour accounted for. Pressures were varied from 6.03 to 11.44 MPa. A specific experiment is reported, starting from an initial volume of 4 mL of liquid mixture methanol+glycerol (methanol/glycerol molar ratio 30), where, with a stepwise addition of CO2, diverse fluid phase phenomena were detected, such as VLE, Critical Point, VLLE, VLLLE, LLE and LE.
