Purification of waste cooking oils via supercritical carbon dioxide extraction

Seung Ah Hong; Jaehoon Kim; Jae Duck Kim; Jeong Won Kang; Youn Woo Lee

doi:10.1080/01496391003688480

Purification of waste cooking oils via supercritical carbon dioxide extraction

Seung Ah Hong, Jaehoon Kim, Jae Duck Kim, Jeong Won Kang, Youn Woo Lee

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Purification of waste cooking oils (palm oil and soybean oil) using supercritical carbon dioxide (scCO₂) extraction has been investigated. The purified oils were characterized by their acid value, conjugated diene value, total polar compound measurements, and high-performance size exclusion chromatography. Using optimal extractions conditions of 353.15 K, 20 MPa, and CO₂ flow rate of 40 g/min, 80% of the oil was recovered and the purified oil compositions and properties were very close to those of the fresh oils. At higher pressures or lower temperatures, the separation efficiency of the scCO₂ extraction was significantly reduced.

Original language	English
Pages (from-to)	1139-1146
Number of pages	8
Journal	Separation Science and Technology
Volume	45
Issue number	8
DOIs	https://doi.org/10.1080/01496391003688480
Publication status	Published - 2010 Jan

Keywords

Extraction
Supercritical carbon dioxide
Waste cooking oil

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Process Chemistry and Technology
Filtration and Separation

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10.1080/01496391003688480

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AU - Hong, Seung Ah

AU - Kim, Jaehoon

AU - Kim, Jae Duck

AU - Kang, Jeong Won

AU - Lee, Youn Woo

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AB - Purification of waste cooking oils (palm oil and soybean oil) using supercritical carbon dioxide (scCO2) extraction has been investigated. The purified oils were characterized by their acid value, conjugated diene value, total polar compound measurements, and high-performance size exclusion chromatography. Using optimal extractions conditions of 353.15 K, 20 MPa, and CO2 flow rate of 40 g/min, 80% of the oil was recovered and the purified oil compositions and properties were very close to those of the fresh oils. At higher pressures or lower temperatures, the separation efficiency of the scCO2 extraction was significantly reduced.

KW - Extraction

KW - Supercritical carbon dioxide

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