Gas assisted mechanical expression of oilseeds: Influence of process parameters on oil yield

P. Willems, N.J.M. Kuipers, A.B. de Haan

Research output: Contribution to journalArticleAcademic

34 Citations (Scopus)

Abstract

Gas assisted mechanical expression (GAME) utilizes the solubility of supercritical CO2 in vegetable oils to enhance the oil yields of mechanical expression of oil seeds. The general applicability of GAME was demonstrated with experiments with sesame, linseed, rapeseed, palm kernel and jatropha (hulled and dehulled) at 40 °C and varying mechanical pressures (10–70 MPa). Furthermore, the influence of moisture content, temperature and CO2-pressure on oil yield and rate of seedbed compaction was investigated. Yields obtained with GAME were up to 30 wt.% higher than conventional expression at the same effective mechanical pressure and temperature. GAME yields for hulled and dehulled seeds were very similar, despite the lower yields for hulled seeds in conventional expression. Up to 10 MPa CO2 yield increased significantly with CO2-pressure. The displacement of oil by dissolved CO2 was identified as the major cause of increased oil yields for both hulled and dehulled seeds. The entrainment of oil during CO2 depressurization is another major cause of increasing oil yield for hulled seeds.
Original languageUndefined
Pages (from-to)298-305
JournalJournal of supercritical fluids
Volume45
Issue number3
DOIs
Publication statusPublished - 2008

Keywords

  • Vegetable oils
  • Supercritical carbon dioxide
  • Gas assisted mechanical expression
  • IR-78888
  • Hydraulic pressing
  • Oil seeds

Cite this

Willems, P. ; Kuipers, N.J.M. ; de Haan, A.B. / Gas assisted mechanical expression of oilseeds: Influence of process parameters on oil yield. In: Journal of supercritical fluids. 2008 ; Vol. 45, No. 3. pp. 298-305.
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abstract = "Gas assisted mechanical expression (GAME) utilizes the solubility of supercritical CO2 in vegetable oils to enhance the oil yields of mechanical expression of oil seeds. The general applicability of GAME was demonstrated with experiments with sesame, linseed, rapeseed, palm kernel and jatropha (hulled and dehulled) at 40 °C and varying mechanical pressures (10–70 MPa). Furthermore, the influence of moisture content, temperature and CO2-pressure on oil yield and rate of seedbed compaction was investigated. Yields obtained with GAME were up to 30 wt.{\%} higher than conventional expression at the same effective mechanical pressure and temperature. GAME yields for hulled and dehulled seeds were very similar, despite the lower yields for hulled seeds in conventional expression. Up to 10 MPa CO2 yield increased significantly with CO2-pressure. The displacement of oil by dissolved CO2 was identified as the major cause of increased oil yields for both hulled and dehulled seeds. The entrainment of oil during CO2 depressurization is another major cause of increasing oil yield for hulled seeds.",
keywords = "Vegetable oils, Supercritical carbon dioxide, Gas assisted mechanical expression, IR-78888, Hydraulic pressing, Oil seeds",
author = "P. Willems and N.J.M. Kuipers and {de Haan}, A.B.",
year = "2008",
doi = "10.1016/j.supflu.2008.01.010",
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journal = "Journal of supercritical fluids",
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Gas assisted mechanical expression of oilseeds: Influence of process parameters on oil yield. / Willems, P.; Kuipers, N.J.M.; de Haan, A.B.

In: Journal of supercritical fluids, Vol. 45, No. 3, 2008, p. 298-305.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - Gas assisted mechanical expression of oilseeds: Influence of process parameters on oil yield

AU - Willems, P.

AU - Kuipers, N.J.M.

AU - de Haan, A.B.

PY - 2008

Y1 - 2008

N2 - Gas assisted mechanical expression (GAME) utilizes the solubility of supercritical CO2 in vegetable oils to enhance the oil yields of mechanical expression of oil seeds. The general applicability of GAME was demonstrated with experiments with sesame, linseed, rapeseed, palm kernel and jatropha (hulled and dehulled) at 40 °C and varying mechanical pressures (10–70 MPa). Furthermore, the influence of moisture content, temperature and CO2-pressure on oil yield and rate of seedbed compaction was investigated. Yields obtained with GAME were up to 30 wt.% higher than conventional expression at the same effective mechanical pressure and temperature. GAME yields for hulled and dehulled seeds were very similar, despite the lower yields for hulled seeds in conventional expression. Up to 10 MPa CO2 yield increased significantly with CO2-pressure. The displacement of oil by dissolved CO2 was identified as the major cause of increased oil yields for both hulled and dehulled seeds. The entrainment of oil during CO2 depressurization is another major cause of increasing oil yield for hulled seeds.

AB - Gas assisted mechanical expression (GAME) utilizes the solubility of supercritical CO2 in vegetable oils to enhance the oil yields of mechanical expression of oil seeds. The general applicability of GAME was demonstrated with experiments with sesame, linseed, rapeseed, palm kernel and jatropha (hulled and dehulled) at 40 °C and varying mechanical pressures (10–70 MPa). Furthermore, the influence of moisture content, temperature and CO2-pressure on oil yield and rate of seedbed compaction was investigated. Yields obtained with GAME were up to 30 wt.% higher than conventional expression at the same effective mechanical pressure and temperature. GAME yields for hulled and dehulled seeds were very similar, despite the lower yields for hulled seeds in conventional expression. Up to 10 MPa CO2 yield increased significantly with CO2-pressure. The displacement of oil by dissolved CO2 was identified as the major cause of increased oil yields for both hulled and dehulled seeds. The entrainment of oil during CO2 depressurization is another major cause of increasing oil yield for hulled seeds.

KW - Vegetable oils

KW - Supercritical carbon dioxide

KW - Gas assisted mechanical expression

KW - IR-78888

KW - Hydraulic pressing

KW - Oil seeds

U2 - 10.1016/j.supflu.2008.01.010

DO - 10.1016/j.supflu.2008.01.010

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JF - Journal of supercritical fluids

SN - 0896-8446

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