supercritical carbon dioxide
Application of genetic algorithm on model-based optimisation of supercritical carbon dioxide extraction: An overview
... Green supercritical carbon dioxide extraction technology has gained enormous interest especially in the application of extraction of natural ...of carbon dioxide as solvent in the ...
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Modelling of Hyssop-Supercritical Carbon Dioxide Extraction System
... Mathematical modeling using Modified Reverchon - Sesti Osseo equation has been performed for Hyssop. The calculated values of standard error of regression show that the modified equation in general has good fit for ...
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Modeling of Adsorption Compression for Supercritical Carbon Dioxide
... for supercritical carbon dioxide adsorption by One-Kondo model ...for supercritical carbon dioxide on activated carbon Filtrasorb 400 and on zeolite 13X have been ...
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Spin Coating and Photolithography Using Liquid and Supercritical Carbon Dioxide
... Carbon dioxide has several properties that make it an attractive solvent. Carbon dioxide is non-flammable, non-corrosive, non-toxic, inexpensive, renewable, and environmentally ...
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Copolymerization of Vinylidene Fluoride with Hexafluoropropylene in Supercritical Carbon Dioxide
... The molecular weight distribution (MWD) of poly(vinylidene fluoride) synthesized continuously in supercritical carbon dioxide is bimodal under some circumstances. A homogeneous model that can account ...
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Synthesis of polyvinyl pyridine/C60 conjugates in supercritical carbon dioxide*
... on supercritical solvents as reaction ...of supercritical fluids has come into picture, particularly supercritical carbon dioxide (scCO 2 ) has non toxic, non flammable and a cost ...
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Continuous Precipitation Polymerization of Acrylic Acid in Supercritical Carbon Dioxide
... in supercritical carbon dioxide was carried out in a batch reactor at 50 °C and 207 bar with tetraallyl pentaerythritol ether and triallyl pentaerythritol ether as the cross-linkers and 2, 2’-azobis ...
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Micronization of Cetirizine Using Rapid Expansion of Supercritical Carbon Dioxide
... and supercritical carbon dioxide enhances the solubility of cetirizine in ...high-pressure carbon dioxide through the ...the supercritical solution through the nozzle no ...
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Solubility of Camphene and Caryophyllene Oxide in Subcritical and Supercritical Carbon Dioxide
... of carbon dioxide. Density value of supercritical carbon dioxide was obtained from Gupta and Shim [40] works, which employed Span and Wagner (1996) equation of state for the calculation ...
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Chemical composition and in vitroevaluation of the cytotoxic and antioxidant activities of supercritical carbon dioxide extracts of pitaya (dragon fruit) peel
... Column chromatography was performed using silica gel (200–300 meshes) (Qingdao Marine Chemistry Co., Qingdao, China) and Sephadex LH-20 (GE Healthcare Bio-Sciences AB, Uppsala, Sweden). Sodium dodecyl sul- fate (SDS) ...
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Regeneration of Nickel Molybdenum Catalysts DN 3531 and Criterion 514 Used in Kerosene and Gas Oil Hydrotreating by Supercritical Carbon Dioxide Extraction
... temperature of the conventional approach, which is one of the major advantages in terms of energy consumption. At temperatures lower, the catalyst does not deteriorate due to its “sintering”, which can occur at higher ...
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SUPERCRITICAL CARBON DIOXIDE EXTRACTION OF MELATONIN FROM BRASSICA CAMPESTRIS: IN VITRO ANTIOXIDANT, HYPOCHOLESTEROLEMIC AND HYPOGLYCAEMIC ACTIVITIES OF THE EXTRACTS
... Melatonin (N-acetyl-5-methoxy-tryptamine, an indoleamine), the hormone of darkness, is highly significant as a biopharmaceutical molecule, especially as an antioxidant and also possesses significant hypoglycaemic and ...
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The extraction of essential oil from Quercus infectoria (Manjakani) galls using supercritical carbon dioxide pressure swing technique
... In the past few years, a published article highlighted the potential of antioxidant activity from Quercus infectoria galls with an addition of ethno botanical that can act as a stimulant and also can be used in treating ...
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Extraction and decomposition of hiba wood into valuable chemicals using stepwise temperature supercritical carbon dioxide treatment
... chloride was added to the aqueous phase to increase extrac- tion effi ciency, then, the extractives were extracted twice with dichloromethane. The solvent-soluble phase was dried by passing through anhydrous sodium ...
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Blend- and Surface-Assisted Foaming of Polymers with Supercritical Carbon Dioxide
... Foamed samples were dried under vacuum at 50°C for 24 h, fractured in liquid nitrogen and mounted on stubs with carbon tape for Au/Pd sputtering in a Hummer 5 Sputtering System (Anatech LTD, Springfield, VA). The ...
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Heterogeneous Catalytic Hydrogenation of Polymers Facilitated by Supercritical Carbon Dioxide
... continuous reactor that was operated at constant pressure. The hydrogenation process achieved high liquid hourly space velocity (300 h -1 ) and space-time yield (2.5×10 5 kg/h/m 3 ). The reaction medium was a single ...
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Hydrating softwood and hardwood samples using pure and modified supercritical carbon dioxide
... pump. Once the desired temperature (50 °C) and pres- sure (20 MPa) had been achieved the entry valve (MV1) into the oven was opened and the system was held at static pressure for 45 min. The pressure was controlled and ...
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A novel method of acetylation of wood using supercritical carbon dioxide
... defi ned as zero when the internal temperature of the con- tainer reached the target value, i.e., 120° or 130°C (Fig. 5). The results of liquid-phase and vapor-phase acetylation with uncatalyzed acetic anhydride ...
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Extraction of Phytochemicals from Grains of Paradise Using Supercritical Carbon Dioxide
... the carbon dioxide was flowed into the plant materials at high temperatures and/or high pressures due to the change of solvent power that can have a strong influence on extraction process [14, 18, ...
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The Analysis of the Equilibrium Cluster Structure in Supercritical Carbon Dioxide
... constant supercritical tempera- ture T, the fluid passes through the structural transition [7-9] from the gas-like structure to the liquid-like ...the supercritical fluid is a het- erogeneous multiphase ...
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