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

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
Keywords: Caffeine solubility;Coffee oil;Supercritical carbon dioxide
Issue Date: 2008
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.
Description: p. 1319-1323.
URI: http://www.repositorio.ufba.br/ri/handle/ri/3826
ISSN: 0100-4042
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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