Supercritical CO2 recovery of caffeine from green coffee oil: new experimental solubility data and modeling

Please use this identifier to cite or link to this item: https://repositorio.ufba.br/handle/ri/3826

metadata.dc.type:	Artigo de Periódico
Title:	Supercritical CO2 recovery of caffeine from green coffee oil: new experimental solubility data and modeling
Other Titles:	Química Nova
Authors:	Azevedo, Álvaro Bandeira Antunes de Kieckbusch, Theo Guenter Tashima, Alexandre Keiji Mohamed, Rahoma Sadeg Mazzafera, Paulo Melo, Silvio Alexandre Beisl Vieira de
metadata.dc.creator:	Azevedo, Álvaro Bandeira Antunes de Kieckbusch, Theo Guenter Tashima, Alexandre Keiji Mohamed, Rahoma Sadeg Mazzafera, Paulo Melo, Silvio Alexandre Beisl Vieira de
Abstract:	The caffeine solubility in supercritical CO2 was studied by assessing the effects of pressure and temperature on the extraction of green coffee oil (GCO). The Peng-Robinson1 equation of state was used to correlate the solubility of caffeine with a thermodynamic model and two mixing rules were evaluated: the classical mixing rule of van der Waals with two adjustable parameters (PR-VDW) and a density dependent one, proposed by Mohamed and Holder2 with two (PR-MH, two parameters adjusted to the attractive term) and three (PR-MH3 two parameters adjusted to the attractive and one to the repulsive term) adjustable parameters. The best results were obtained with the mixing rule of Mohamed and Holder2 with three parameters.
Keywords:	Caffeine solubility Coffee oil Supercritical carbon dioxide
URI:	http://www.repositorio.ufba.br/ri/handle/ri/3826
Issue Date:	2008
Appears in Collections:	Artigo Publicado em Periódico (Química)

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