Extraction of ho-sho (Cinnamomum camphora nees and eberm var. Linaloolifera fujita) essential oil with supercritical CO2: experiments and modeling

AUTOR(ES)

Steffani, E., Atti-Santos, A. C., Atti-Serafini, L., Pinto, L. T.

FONTE

Brazilian Journal of Chemical Engineering

DATA DE PUBLICAÇÃO

2006-06

RESUMO

Supercritical CO2 extraction of essential oil from the leaves of a variety of camphor tree known as Ho-Sho was studied. Experiments were carried out within the following ranges: CO2 flow rate (1 - 4 mL/min); pressure (80 - 100 bar); temperature (40 - 60 ºC) and particle size (0.37 - 1.0 mm). The equipment used was an HP 8670 T extractor module with an extraction cell volume of 7 mL. Two mathematical models of the process were proposed. Model 1 was a modified version of the traditional shrinking core model with effective diffusivity and the external mass transfer coefficient as the fitting parameters. Model 2 used an additional kinetic parameter based on an Arrhenius-like expression. Both models took into account the cell pressurization step. The best fit between the extraction model curves and the experimental data was obtained using model 2.

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