Extraction of parsley seed oil by supercritical CO2 (original) (raw)

Supercritical CO 2 extraction of nutmeg oil: Experiments and modeling

Journal of Supercritical Fluids, 2006

Nutmeg oil was extracted from nutmeg seed at pressures of 15-20 MPa and temperatures of 313-323 K with supercritical CO 2 . The effects of separation parameters such as temperature, pressure, CO 2 flow rate and particle size on the extraction rate of nutmeg oil were observed. Broken and intact cells (BIC) model combined with discontinuous phase equilibrium between fluid phase and solid phase, and shrinking core model were selected to describe the extraction process. For BIC model, the initial fraction solute in broken cell to total solute in the ground particle f, dimensionless transition concentration X c and partition coefficient K were used as fitting parameters. For shrinking core model, two effective diffusivities D e were used as fitting parameters. The best fitting of D e1 was from 4.33 × 10 −9 to 7.69 × 10 −8 m 2 /s and D e2 was from 1.90 × 10 −9 to 3.20 × 10 −8 m 2 /s. From comparison of experimental data and models calculation, the shrinking core model could describe the experimental data well for all extraction conditions, while the BIC model could only describe the data at lower extraction yields well.

Supercritical CO2 extraction of hiprose seed oil: experiments and mathematical modelling

Chemical Engineering Science, 2000

Hiprose seed oil has been extracted by supercritical CO operating at pressures of 1500, 3000, 6000 and 10 000 psi, temperatures of 40, 50 and 703C, CO #ow rates of 1, 2, 4 and 6 g/min using mean particle sizes of 0.42, 0.79 and 1.03 mm. The obtained oil yield data has been used to validate a mathematical model of the extraction process, based in part on the information obtained from the microscopic structure of the hiprose seed particles. The di!erential mass balances forming the model have been numerically integrated. The best "t between model curves and data has been obtained when a linearly variable internal mass transfer coe$cient was adopted, with an initial value of 1.9;10\ m/s.

Extraction of Oil from Canola Seeds With Supercritical Carbon Dioxide: Experimental and Modeling

In this work extraction oil from canola (Brassica Napus) seeds with supercritical CO 2 extraction at pressure of 1500 to 2750 Psi, temperature of 308 to 333 k, and particles size 0.08 to 0.2 mm in flow rate 5 Lit/hr was investigated in a bench scale apparatus. The extraction was modeled by the sovova extended lack's model. The fluid phase mass transfer coefficient (k f ), solid phase mass transfer coefficient (ks), and hardly accessible solute (x k ) were just able parameter of Models. The broken and intact cells model fit the experimental data, quite well, showing the applicability of the model to the supercritical extraction system studied here.

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.

Mathematical modelling of supercritical CO2 extraction of volatile oils from aromatic plants

Chemical Engineering Science, 2010

The modelling of the experimental data of the extraction of the volatile oil from six aromatic plants (coriander, fennel, savoury, winter savoury, cotton lavender and thyme) was performed using five mathematical models, based on differential mass balances. In all cases the extraction was internal diffusion controlled and the internal mass transfer coefficient (k s ) have been found to change with pressure, temperature and particle size. For fennel, savoury and cotton lavender, the external mass transfer and the equilibrium phase also influenced the second extraction period, since k s changed with the tested flow rates.

Pressure effect in supercritical CO2 extraction of plant seeds

The Journal of Supercritical Fluids, 2008

Effect of pressure on supercritical carbon dioxide extraction from various seeds was studied. Three kinds of seeds (rosehip, loquat and physic nut) were used as materials. Extraction was conducted at constant temperature (40, 60 and 80 • C), at CO 2 flow rate of 3 ml/min and at various pressures (15-9 MPa). Recovery of extract was compared with soxhlet extraction recovery using hexane as solvent. Based on results at constant temperature, the recovery of rosehip seed oil increased with increasing pressure at short extraction time, but decreased as extraction time progressed. Compared with soxhlet extraction, SC-CO 2 extraction could extract more rosehip oil higher than soxhlet extraction using hexane. In the extraction of rosehip seed oil, the cross-over region was observed. The recovery of loquat seed oil increased with decreasing pressure at 60 and 80 • C, but at 40 • C, extraction recovery was independent of the pressure. For physic nut, increasing pressure allowed high extraction recovery from 83.7 to 88.7% at constant temperature. However, the SC-CO 2 extraction could not completely extract oil from physic nut seeds compared with soxhlet extraction using hexane. The experimental results could be described using two simple models, the partitioning K D model and a two-site kinetic model. The two-site kinetic model applied well at higher pressure compared whereas the K D model failed to correlate the data at high pressure.

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...