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

• Autor(a) principal: Steffani,E.
• Data de Publicação: 2006
• Outros Autores: Atti-Santos,A. C., Atti-Serafini,L., Pinto,L. T.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Chemical Engineering
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000200014
• topic: Supercritical extraction; Essential oil; Ho-sho; Mathematical modeling

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.