Cold-pressed yuzu oil fractionation using countercurrent supercritical CO2 extraction column

• Published in: Separation and purification technology Vol. 71; no. 1; pp. 107 - 113
• Main Authors: Terada, Akihiro, Kitajima, Nahoko, Machmudah, Siti, Tanaka, Masahiro, Sasaki, Mitsuru, Goto, Motonobu
• Format: Journal Article
• Language: English
• Published: 29.01.2010
• Subjects: Aroma; Carbon dioxide; Composition effects; Enrichment; Extraction; Fractionation; Purification; Separation; Temperature gradient
• ISSN: 1383-5866
• DOI: 10.1016/j.seppur.2009.11.009

Supercritical CO2 fractionation of cold-pressed yuzu oil was carried out in semi-continuous extraction column. The effect of temperature and pressure on the extraction yield, extract fractions composition and recovery factor of aroma components was investigated. Temperature gradient along the column was also applied to achieve the effective separation. At isobaric condition, temperature had no significant effect on the extraction yield. On the other hand, increasing temperature gradient affected to the extraction yield. Sesquiterpene from yuzu oil has been successfully separated in this work. The highest enrichment of sesquiterpene in the residual oil could be obtained at 8.8MPa with temperature gradient of 40-100A degree C. However, the higher yield of extract was found at 20MPa and 40A degree C. In addition, 94% of I-elemene could be recovered from yuzu oil at 8.8MPa and 60A degree C. This result showed that yuzu oil is potential source of I-elemene.