CO2+Methanol+Glycerol : multiphase behaviour

• Autor(a) principal: Carrera, Gonçalo V. S. M.
• Data de Publicação: 2018
• Outros Autores: Visak, Zoran P., Lukasik, Rafal M., Ponte, Manuel Nunes
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.9/3123
• topic: 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.