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

Química Nova

Álvaro Bandeira Antunes De Azevedo²  Theo Guenter Kieckbusch²  Alexandre Keiji Tashima²  Rahoma Sadeg Mohamed²  Paulo Mazzafera¹  Silvio Alexandre Beisl Vieira De Melo¹ 

[1] ,Universidade Estadual de Campinas Faculdade de Engenharia Química Campinas SP ,Brasil

关键词: caffeine solubility;    coffee oil;    supercritical carbon dioxide;   

DOI  :  10.1590/S0100-40422008000600009

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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