Extraction of crude palm oil using supercritical CO2
The effects of changing the operating pressure and temperature on the solvating strength of supercritical carbon dioxide and the solubility of crude palm oil in the solvent were discussed. The operating temperatures and pressures investigated are 40, 50 and 60°C, and 110, 140 and 200 bars. Change...
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| Main Authors: | , , |
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| Format: | Article |
| Published: |
2002
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| Online Access: | http://journalarticle.ukm.my/1387/ http://www.ukm.my/jkukm/index.php/jkukm |
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| Summary: | The effects of changing the operating pressure and temperature on the solvating
strength of supercritical carbon dioxide and the solubility of crude palm oil in the
solvent were discussed. The operating temperatures and pressures investigated are 40,
50 and 60°C, and 110, 140 and 200 bars. Changes in pressure showed a stronger
influence on palm oil solubility in CO2 compared to temperature. The rate of
extraction and the solubility of palm oil increased when the system pressure was
increased (at constant temperature) or when the system temperature was decreased (at
constant pressure). These results are comparable with the reported results of solubility
of other vegetable oils such as soybean and olive oils. The change in the physical
behaviour and the colour of the oil extracts and residues were also observed. It was
discovered that the initial fractions of palm oil extracted were solid like while the
latter fractions were semi-liquid. As the extraction progressed, the orange colour of
the fractions became progressively more intense at 200 bars. At lower pressures of
140 and 110 bars, however the colour intensity was reduced, indicating decreasing
density and solvating strength of the supercritical CO2 |
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