Química Nova | |
Supercritical CO2 recovery of caffeine from green coffee oil: new experimental solubility data and modeling | |
Universidade Federal da Bahia, Salvador, Brasil1  Mazzafera, Paulo1  Tashima, Alexandre Keiji1  Melo, Silvio Alexandre Beisl Vieira de1  Universidade Estadual de Campinas, Campinas, Brasil1  Azevedo, Álvaro Bandeira Antunes de1  Kieckbusch, Theo Guenter1  Mohamed, Rahoma Sadeg1  | |
关键词: caffeine solubility; coffee oil; supercritical carbon dioxide.; | |
DOI : 10.1590/S0100-40422008000600009 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 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】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050594230ZK.pdf | 264KB | download |