Optimization of Supercritical CO2 Extraction of Safflower Seed Oil Using Response Surface Methodology.pdf (original) (raw)
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Extraction of safflower seed oil by supercritical CO 2
Journal of Food Engineering, 2009
Safflower seed oil extraction with supercritical CO 2 at series operational parameters of pressure, temperature, flow rate and particle size was investigated in a bench scale apparatus. The results show that the extraction yields plotted as a function of time are significantly affected by the extraction pressure, flow rate and particle size, but extraction yields plotted versus CO 2 used are scarcely affected by flow rate. Extraction temperature has a slight effect on the extraction curves. In order to describe the extraction process, the Sovova's extended Lack's Model (SLM) was used and the experimental data were well fitted by it. The extraction was scaled up to pilot plant and the computed values of SLM are in good agreement with the pilot plant data. Additionally, the quality of safflower seed oil obtained by supercritical CO 2 extraction is superior to that of oil obtained by traditional methods. It is noted that a new method of changing flow rate was proposed to improve the process efficiency and proved to be valuable by experiment.
Critical review of supercritical carbon dioxide extraction of selected oil seeds
Acta periodica technologica, 2010
Supercritical carbon dioxide extraction, as a relatively new separation technique, can be used as a very efficient process in the production of essential oils and oleoresins from many of plant materials. The extracts from these materials are a good basis for the new pharmaceutical products and ingredients in the functional foods. This paper deals with supercritical carbon dioxide extraction of selected oil seeds which are of little interest in classical extraction in the food industry. In this article the process parameters in the supercritical carbon dioxide extraction, such as pressure, temperature, solvent flow rate, diameter of gound materials, and moisture of oil seed were presented for the following seeds: almond fruits, borage seed, corn germ, grape seed, evening primrose, hazelnut, linseed, pumpkin seed, walnut, and wheat germ. The values of investigated parameters in supercritical extraction were: pressure from 100 to 600 bar, temperature from 10 to 70oC, diameter of grindi...
Journal of Supercritical Fluids, 2010
Supercritical carbon dioxide (SC-CO2) was employed to extract oil rich in omega-3 fatty acids (FAs) from chia seeds, and the physicochemical properties of the oil were determined. A central composite rotatable design was used to analyze the impact of temperature (40 °C, 60 °C and 80 °C), pressure (250 bar, 350 bar and 450 bar) and time (60 min, 150 min and 240 min) on oil extraction yield, and a response surface methodology (RSM) was applied. The extraction time and pressure had the greatest effects on oil. The highest oil yield was 92.8% after 300 min of extraction time at 450 bar. The FA composition varied depending on operating conditions but had a high content of α-linolenic acid (44.4–63.4%) and linoleic acid (19.6–35.0%). The rheological evaluation of the oils indicated a Newtonian behavior. The viscosity of the oil decreased with the increase in temperature following an Arrhenius-type relationship.
Extraction of sunflower oil with supercritical CO2: Experiments and modeling
The Journal of Supercritical Fluids, 2006
Extraction of sunflower oil from sunflower seeds (Heliantus annuus L.) using supercritical CO 2 was studied. The shrinking core model was applied to the modeling of the packed-bed extraction process. The experimental data were obtained for extraction conducted at the pressures of 20, 30, 40, 50 and 60 MPa; the temperatures of 313, 333 and 353 K, the CO 2 flow rates of 1-4, and 6 cm 3 CO 2 min −1 ; the mean particle diameters of 0.23, 0.55, 1.09, 2.18 mm. The supercritical CO 2 extraction process was modeled by a quasi steady state model as a function of extraction time, pressure, temperature, CO 2 flow rate, and particle diameter. The supercritical CO 2 extraction process. The intraparticle diffusion coefficient (effective diffusivity) D e was used as adjustable parameter. The model using the best fit of D e was correlated the data satisfactorily.
Indonesian Journal of Chemistry, 2018
Until now, the patchouli oil is the largest commodity export of essential oil for Indonesia. But the price of patchouli oil is often unstable due to the quality of oil which fluctuates depending on the components. To improve the performance and quality of patchouli oil had been carried out the purification process using supercritical CO2 fluid extraction method. Optimization conditions of the extraction process using the approach of Response Surface Methodology (RSM) and the influence of independent variables include temperature (35–45 °C), pressure (80–150 atm) and the time of extraction (60–300 min), and then evaluated using a Box-Behnken Design (BBD). Analysis of the components in the extract was carried out by using GC-MS and GC-FID to detect the changes of compositions of the components containing the oil before and after the extraction process. The optimum condition of supercritical extraction within experimental range of the studied variables was at 38 °C, 146.35 atm and 74 m...
Response surface analysis and modeling of flaxseed oil yield in supercritical carbon dioxide
Journal of the American Oil Chemists' Society, 2009
Supercritical fluid extraction of flaxseed oil with carbon dioxide was performed. Effects of particle size, pressure, temperature and the flow rate of supercritical carbon dioxide (SC-CO 2 ) were investigated. Response surface methodology was used to determine the effects of pressure (30-50 MPa), temperature (50-70°C) and SC-CO 2 flow rate (2-4 g/min) on flaxseed oil yield in SC-CO 2 . The oil yield was represented by a second order response surface equation (R 2 = 0.993) using the Box-Behnken design of experiments. The oil yield increased significantly with increasing pressure (p \ 0.01), temperature (p \ 0.05) and SC-CO 2 flow rate (p \ 0.01). The maximum oil yield from the response surface equation was predicted as 0.267 g/g flaxseed for 15 min extraction of 5 g flaxseed particles (particle diameter\0.850 mm) at 50 MPa pressure and 70°C temperature, with 4 g/min solvent flow rate. Total extraction time at these conditions was predicted as 22 min.
Comparison of processes for the supercritical carbon dioxide extraction of oil from soybean seeds
Journal of the American Oil Chemists’ Society, 1994
Three different process alternatives for the production of soybean oil by supercritical carbon dioxide extraction were analyzed. The first two processes were organized according to the classical scheme, based on high-pressure extraction followed by separation induced by pressure reduction. Different techniques were used to recover the solvent in these two schemes, in the liquid and in the gas phases, respectively. The third alternative was based on an isobaric scheme--the oil, extracted at high pressure, was separated by changing the temperature in the separator. In a further improvement, a technique for the heat transfer network integration was added to all the process schemes. The different schemes were used to establish the process configuration that can produce a lower operating cost for soybean oil extraction. Operating costs were considered on an industrial scale to carry out a screening of the different alternatives. The operating cost of these plants were then compared with the hexane extraction process. A substantial reduction in the specific costs was obtained in the case of heat transfer integration, and the operating costs fell in the same range as conventional extraction plants.
Experimental and modelling of supercritical oil extraction from rapeseeds and sunflower seeds
Chemical Engineering Research and Design, 2011
The supercritical oil extraction from oleaginous seeds (sunflower and rapeseeds) is presented here through experimental and modelling results. The experimental setup allows an accurate following of the mass of the oil extracted and to derive the experimental influences of pressure, temperature and supercritical CO 2 flowrate on the extraction curves. These parameters are very sensitive and highlight the necessity of precise optimisation of experimental conditions. In order to complete the behaviour of supercritical fluids extraction, an improved modelling is proposed. The modelling basic equations are based on others modelling published previously. In this work, the determination of several parameters comes from correlations and the other constants are fitted with all the experimental results. Thus the modelling is more representative and predictive as other ones. The modelling results present a good agreement with the experimental results, and hence it can be used for the dimensioning of some extraction autoclaves.
Extraction of sesame seed oil using supercritical CO2 and mathematical modeling
Journal of Food Engineering, 2010
In this work, extraction of sesame oil from sesame seeds using supercritical CO 2 was carried out. The effect of operating parameters such as pressure, temperature, and supercritical CO 2 flow rate and particle size on extraction yield were investigated. An increase in the pressure and the supercritical CO 2 flow rate improved the extraction yield and also shortened the extraction time. The extraction yield increased as the particle size decreased depending on decreasing intraparticle diffusion resistance. The maximum extraction yield obtained was about 85% (relative to Soxhlet extraction by hexane) at 50°C, 350 bar, 2 mL CO 2 /min, 300-600 lm of particle size. Some extraction curves were modeled with two mathematical approaches as shrinking core model and broken and intact core model. The evaluation of model parameters showed that shrinking core model, however, is better than broken and intact cell model.