Azevedo, Álvaro Bandeira Antunes deKieckbusch, Theo GuenterTashima, Alexandre KeijiMohamed, Rahoma SadegMazzafera, PauloMelo, Silvio Alexandre Beisl Vieira de2022-04-072022-04-072008AZEVEDO, Á. B. A. et al. Supercritical CO2 recovery of caffeine from green coffee oil: new experimental solubility data and modeling. Química Nova, São Paulo, v. 31, n. 6, p. 1319-1323, 2008.1678-7064https://doi.org/10.1590/S0100-40422008000600009http://www.sbicafe.ufv.br/handle/123456789/13441The 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.pdfenOpen AccessCcaffeine solubilitySupercritical carbon dioxideCoffee oilCafeicultura::Qualidade de bebidaArtigo