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KMID : 1007519950040020122
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Food Science and Biotechnology
1995 Volume.4 No. 2 p.122 ~ p.127
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Performance of Packed Columns for Continuous Countercurrent Supercritical CO₂ Processing of Anhydrous Milk Fat
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Lim Sangbin
Syed S. H. Rizvi
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Abstract
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Performance of packed columns for continuous countercurrent supercritical fluid processing of anhydrous milk fat (AMF) was investigated. The extraction column was operated as a stripping column with the supercritical carbon dioxide (SC-CO₂) as the continuous phase and the AMF as the dispersed phase. Mass transfer efficiencies of a spray column and two packed columns were calculated by utilizing three approaches: the
Kremser equation, the McCabe-Thiele method and a modified version of the Riccati difference equation. The last approach was found to adequately describe the case in which the solvent-tefeed ratio varies inside a column. The packed columns showed mass transfer efficiencies five times greater than the spray column. Mass transfer efficiencies increased with a decrease in the superficial velocity of the dispersed phase and an increase in the superficial velocity of the continuous phase.
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