Química Nova | |
Supercritical CO2 recovery of caffeine from green coffee oil: new experimental solubility data and modeling | |
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
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
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RO202005130062509ZK.pdf | 264KB | download |