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The Study of Parameters in Supercritical Carbon Dioxide Extraction of Oil by Response Surface Methodology

., Fareeda Chemat (2012) The Study of Parameters in Supercritical Carbon Dioxide Extraction of Oil by Response Surface Methodology. UNIVERSITI TEKNOLOGI PETRONAS, UNIVERSITI TEKNOLOGI PETRONAS. (Unpublished)

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Abstract

Response surface methodology was applied in this study to optimize the operating parameters of supercritical carbon dioxide (SC-CO2) extraction of wheat bran oil (WBO) and rice bran oil (RBO). The effect of operating temperature, pressure and carbon dioxide (CO2) mass on the oil yield were studied. First, the design was carried out following a Box-Behnken design of experiment for the WBO, the independent variables were the temperature (40, 50 and 60 oC), pressure (10, 20 and 30 MPa) and CO2 mass (400, 1825 and 3250 g). Second, 3-level factorial design for RBO, the independent variables were the temperature (45, 65 and 85 oC) and pressure (20, 27.5 and 35 MPa). The study showed that the second-order polynomial model was sufficient to be used and best fit of the data. The optimal conditions predicted within these experimental ranges were at 29.4 oC, 60 MPa and 3250 g, the maximum oil yield was 2.97 g/12g of wheat bran for the WBO. The operating temperature, pressure and CO2 mass proved significant effect in increasing the yield of WBO while these parameters increased. For the RBO, optimal conditions were at 45 oC and 35 MPa, the maximum oil yield predicted was 0.23 kg/kg of rice bran for RBO. The operating temperature increase effect in decreasing the yield of RBO while the pressure has the significant effect in increasing the RBO yield. From the result, the extraction process has not been optimized yet because the optimal operating conditions were predicted at the maximum value of each parameter. However, the suggestion is to further conduct the additional experiments in a wider range of parameters in order to get the best result and more accurate optimum value of parameters. Lastly the economic feasibility study was conducted for the supercritical carbon dioxide extraction of RBO plant and it is economically justified.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Separation Process
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Sharifah Fahimah Saiyed Yoep
Date Deposited: 01 Apr 2013 11:33
Last Modified: 25 Jan 2017 09:39
URI: http://utpedia.utp.edu.my/id/eprint/6166

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