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KMID : 1007519950040030174
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Food Science and Biotechnology
1995 Volume.4 No. 3 p.174 ~ p.178
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Mass Transfer for Alcohol Recovery in a Countercurrent Extraction Column using Supercritical CO₂
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Chun, Byung-Soo
Yang, Ji-Young/Wilkinson, Gordon
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Abstract
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The mass transfer and hydraulic characteristics were determined for countercurrent extraction in a spray column with supercritical carbon dioxide solvent. The test used system was alcohol(ethano1, iso-propano1)-water-CO₂ at 25-40℃ and 8.27~13.79 MPa. Results obtained in a 22 mm inside diameter column showed that enhanced extraction efficiencies were achieved at supercritical conditions. Models based on conventional liquid-liquid extraction were modified for supercritical conditions and correlated overall mass transfer coefficient with an average absolute relative deviation (A.A.R.D.) of 11.5%.
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