Artículo
Liquid-liquid-supercritical fluid equilibria for systems containing carbon dioxide, propane, and triglycerides
Hegel, Pablo Ezequiel
; Mabe, Guillermo Domingo
; Zabaloy, Marcelo Santiago
; Pereda, Selva
; Brignole, Esteban Alberto
Fecha de publicación:
07/2009
Editorial:
American Chemical Society
Revista:
Journal of Chemical and Engineering Data
ISSN:
0021-9568
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The use of mixed near-critical solvents such as CO2 + propane, for vegetable oil extraction processes, has the advantage of the good solvent capacity of propane together with a nonflammable vapor phase due to the CO2 content. The modeling of phase equilibria of these near-critical solvents with triglycerides using the GCEOS model has been studied in several works; however, this model is not able to predict correctly the liquid-liquid-vapor region for mixtures of carbon dioxide and propane with triglycerides using the available group binary interaction parameters. In this work, new experimental phase equilibria data on the binary and ternary systems including CO2, propane, and triacetin are presented. These data are useful to properly assess the interaction parameters of CO2 and propane with the triester group (TG) of the oil molecule. Liquid CO2 is completely miscible with triacetin, and the addition of propane increases the liquid immiscibility of this ternary mixture. This is the opposite behavior presented by mixtures with long-chain triglycerides, in which addition of CO2 increases liquid immiscibility.
Palabras clave:
Phase Equilibria
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Identificadores
Colecciones
Articulos(PLAPIQUI)
Articulos de PLANTA PILOTO DE INGENIERIA QUIMICA (I)
Articulos de PLANTA PILOTO DE INGENIERIA QUIMICA (I)
Citación
Hegel, Pablo Ezequiel; Mabe, Guillermo Domingo; Zabaloy, Marcelo Santiago; Pereda, Selva; Brignole, Esteban Alberto; Liquid-liquid-supercritical fluid equilibria for systems containing carbon dioxide, propane, and triglycerides; American Chemical Society; Journal of Chemical and Engineering Data; 54; 7; 7-2009; 2085-2089
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