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KMID : 1024420130170010084
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Food Engineering Progress
2013 Volume.17 No. 1 p.84 ~ p.90
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Optimization of Yield of Extracting Oil Components from Soy bean Powder using Supercritical Carbon Dioxide Fluid and High Pressure Process
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Uhm Joo-Tae
Kim Nam-Gyun
Lee Youn-Ju
Yoon Won-byung
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Abstract
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Response surface methodology (RSM) was applied to determine the optimum operating conditions to maximize the yield of oil components from the soy bean powders using a novel combined process of a supercritical CO2 fluid extraction (SCFE) with a high pressure process (HPP) as a pretreatment. The optimization of the combined process was conducted with two steps: 1) determining the optimum conditions for maximizing the yield under the SCFE, and 2) determining the optimum conditions for HPP at the optimum operating conditions of SCFE determined from the step 1. Central composite design was applied for both steps of optimization. The process variables for SCFE were ranged from 200-400 bar, 40-70oC, and 20-40 g/min) for the pressure of extraction vessel, temperature, and mass flow rate, respectively. In addition the process variables for HPP were the applied pressure (100-400 MPa) and the applied time (5-25 min). The maximum yield from SCFE was 25.88% at 468.18 bar, 80.23oC, and 46.82 g/min. The optimum operating conditions of HPP in the combined process was predicted to be 462.13 MPa and 1 min. for 24.91% of yield. The yield of the combined process was lower than that of SCFE. It might be because of the increase of particle size due to the agglomeration after applying HPP.
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KEYWORD
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optimization, soybean powder, supercritical fluid extraction, high pressure processing, agglomeration
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