Oil removal from spent bleaching earth of vegetable oil refinery plant using supercritical carbon dioxide. Issue 10 (October 2022)

• Record Type: Journal Article
• Authors: Machmudah, Siti; Maulana, Nabil Apta; Norman, Andhika Shafian Maindo; Nyoto, Valencia Marchilia; Amrullah, Irji; Wahyudiono, ; Winardi, Sugeng; Wenten, I Gede; Goto, Motonobu
• Is Part Of: Heliyon. Volume 8:Issue 10(2022)
• Publication Date: 2022-10
• Subjects: Spent bleaching earth -- Supercritical CO2 -- Extraction -- Oil recovery -- Vegetable oil; Research -- Periodicals; Medical sciences -- Periodicals; Natural history -- Periodicals; Social sciences -- Periodicals; Earth sciences -- Periodicals; Physical sciences -- Periodicals; 507.2
• DOI: 10.1016/j.heliyon.2022.e10826
• Languages: English
• ISSNs: 2405-8440

Abstract

Abstract: The oil in the spent bleaching earth (SBE) matrix was successfully removed by applying the supercritical carbon dioxide (SCCO2 ) extraction technique in a semi-continuous flow–type system. The SCCO2 extraction process was conducted at 40–80 °C and 20–30 MPa with extraction time of ∼180 min. The color of SBE matrix changes from the dark to dark-pale color after the SCCO2 extraction treatment exhibiting the substances including oil in the SBE matrix were successfully removed. The extracted oil yield was around 95% when the SCCO2 extraction process was performed at 40 °C and 30 MPa with 10% ethanol addition as a co–solvent. The GC analysis showed that the prominent fatty acid constituents in the extracted oil are palmitic and oleic acids, furthermore it can be fed as a feedstock to produce biodiesel fuel. Next, it can be proposed that SCCO2 extraction system is a viable way to extract oil from the SBE matrix. Abstract : Spent bleaching earth; Supercritical CO2 ; Extraction; Oil recovery; Vegetable oil