초임계 이산화탄소를 이용한 캐놀라 오일 추출

In this study, two supercritical extraction systems of different scale, analytical-scale and lab-scale, were employed to investigate the extraction efficiency of canola oil from canola seeds using supercritical carbon dioxide (SCCO 2 ) as an extraction solvent. The effects of various parameters such as extraction temperature (40~80℃), pressure (200~500 bar), particle size, and SCCO 2 flow direction on the extraction rate and yield were examined in detail. Triglycerides and fatty acids in the extracted canola oil were analyzed quantitatively by high-performance liquid chromatography and gas chromatography. The solubility values of canola oil in SCCO 2 could be calculated from the experimental results. Similar extraction yields were obtained from both analytical-scale and lab-scale extraction systems. The extraction rates obtained under solvent SCCO 2 ) upflow conditions were found to be higher than those of solvent downflow extraction. However, the effect of SCCO 2 flow direction on the extraction yield was observed to be relatively insignificant.