Supercritical extraction of clove bud essential oil: isolation and mathematical modeling

• Published in: Chemical engineering science Vol. 52; no. 20; pp. 3421 - 3428
• Main Authors: Reverchon, E., Marrone, C.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.10.1997; Elsevier
• Subjects: Applied sciences; Chemical industry and chemicals; clove bud; essential oil; Essential oils, perfumes; Exact sciences and technology; modelling; Supercritical extraction; Washing products. Cosmetics and toiletries. Perfumes; Supercritical extraction; clove bud; essential oil; modelling; Chemical analysis; Coupled method; Carbon dioxide; Temperature effect; Modeling; Gas chromatography; Pressure effect; Dicotyledones; Syzygium aromaticum; Angiospermae; Myrtaceae; Supercritical solvent; Spermatophyta; Essential oil; Kinetics; Mathematical model; Supercritical fluid extraction; Mass spectrometry
• ISSN: 0009-2509; 1873-4405
• DOI: 10.1016/S0009-2509(97)00172-3

Clove bud essential oil has been isolated by supercritical CO 2 extraction performed at 90 bar, 50°C plus a fractional separation of the extracts in two separators operated in series. The experiments have been performed at three CO 2 flow rates and at four extraction bed heights. Different models based on the numerical integration of differential mass balances have been tested. The comparison has been performed in terms of the extraction yield and in terms of the concentration in the fluid phase at the exit of the extraction bed. The best fit between the model curves and the experimental data has been obtained using a model in which the deviation from the equilibrium conditions has been attributed to a small external mass transfer resistance.