Proceedings

Supercritical CO2 Mediated Continuous Countercurrent Fractionation of Valuable Components from Citrus Processing Bi-products

Yasumoto, S. – Kumamoto University, Japan

(free)

Supercritical carbon dioxide (SCCO2) fractionation of d-limonene and canola oil mixture as a model of valuable components (i.e. essential oil and seed oil, respectively) from citrus processing residues was carried out in continuous countercurrent column. The effect of temperature and pressure on the recovery of d-limonene from top of the extraction column was investigated. Temperature gradient along the column was also applied to achieve effective separation. At isobaric condition (10 MPa), the highest enrichment of d-limonene in the extract could be obtained at 60oC. However, the highest recovery of the extract was found at 30oC. Evaluation of the separation
performance of this proposed process was carried out by calculation of mass transfer correlation coefficient, theoretical number of separation stages and solubility of the components in SCCO2.

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