Supercritical CO2
Top PDF Supercritical CO2:
Solubility of bioinsecticides in supercritical CO2. Experimental measurement and modeling with the GC-EOS.
... Juliana L. Maia, Ana Lúcia M. L. da Mata and Camila G. Pereira EQ-121 - SOLUBILITY OF BIOINSECTICIDES IN SUPERCRITICAL CO2. EXPERIMENTAL MEASUREMENT AND MODELING WITH THE GC-EOS Nicolás Gañán, Hernán ...
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Functionalized adsorbent materials using supercritical CO2
... the supercritical anhydrous process, the water needed to start the hydrolysis comes from moisture adsorbed on the substrate pores and no additional water was added to the ...
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Mathematical simulation of heat and mass transfer during controlled depressurization of supercritical CO2 in extraction vessels
... of supercritical state for a pure fluid (Brunner, ...four-vessel supercritical fluid extraction plant operating in parallel (the color represents the freshness of the material; the darker the color, the ...
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Synthesis of supported catalysts of Co, Ni and Ru using supercritical Co2 for Biomass valorization reactions
... different structure, one mesoporous (MCM-48) and other microporous (activated carbon) has been studied. Both cases have shown good results where the metallic loading in the support increased with the supercritical ...
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Measurement of the equilibrium partition of tomato oleoresin between supercritical CO2 and selected adsorbents using dynamic methods
... Components of a solid matrix have been separated using solvents (solid-liquid extraction or lixiviation) since immemorial times. In this process the solvent dissolves one or more soluble components in the solid matrix ...
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Implementation of a counter current packed column for fractionation of key six carbon apple aromas using supercritical CO2
... In non-aqueous mixtures, there is plenty of information available regarding edible oil components and derivatives (Table 2.1), specifically on fractionation and concentration of sterols, tocopherols, fatty acids, and ...
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Water Extractable Arabinoxylan Aerogels Prepared by Supercritical CO2 Drying
... Water extractable arabinoxylan (WEAX) aerogels were prepared by extracting the solvent from the alcogels (WEAX hydrogels with an alcohol as the solvent) with carbon dioxide under supercritical conditions. WEAX ...
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Development of a simulation tool for the economic optimization of an extraction plant for vegetable substrates using supercritical CO2
... extraction of prepressed rapeseeds (20% residual oil content) by process simulation. This system was selected because a fully predictive mass transfer model exists based on shrinking core hypothesis. The extractions were ...
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Simulation of the supercritical CO2 extraction from natural matrices in packed bed columns: User-friendly simulator tool using Excel
... being supercritical fluids (SCF) the most extended option. Supercritical fluid extraction (SFE) would have two main advantages against the conventional ...
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Viscoelastic behaviour of polystyrene/supercritical CO2 mixtures used for foaming applications
... Finally, given the combination of factors involved in foam extrusion, the identification and isolation of temperature, pressure and concentration effects on viscoelastic properties of po[r] ...
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Numerical simulation on supercritical CO2 fluid dynamics in a hollow fiber membrane contactor
... Researchers have mainly reported on the 2D simulations of the mass transfer and velocity profile [ 1 – 4 ], however, the question of what the fluid dynamic behavior of a supercritical fl[r] ...
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A novel supercritical CO2 recompression Brayton power cycle for power tower concentrating solar plants
... air. Supercritical Brayton power cycle is chosen for the power block because it can surpass 50% e ffi ciency, even when working in dry cooling conditions, and printed circuit heat exchangers are usually recommended ...
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Development of alternatives that avoid caking of microalgae powder during supercritical CO2 extraction
... significantly the astaxanthin yield. The author also noticed that water was co-extracted during the extraction, which eventually dried the paste, becoming a solid type extraction. This undesirable water co-extraction was ...
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Impregnation and functionalization of biodegradable polymers via click chemistry using supercritical CO2
... The use of a catalyst in heterogeneous phase in spite of a catalyst in homogeneous phase in click chemistry was the following study carried out in this doctoral thesis. The use of copper wires make possible to obtain ...
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Equilibrium partition of vegetable extracts between pretreated vegetable substrates and pure or oil modified supercritical CO2
... SC CO2 at 353 K and 90 MPa, this manuscript shows that the initial oil content in the pre- treated seed affects the apparent solubility of the oil, that the partition of the oil between the seed and CO2 ...
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Extraction of alkylresorcinols from wheat bran with supercritical CO2
... Fatty acids are organic compounds formed by a hydrocarbonated Ca?n and a carboxilic group, which normally are bounded with glycerol forming acylglycerides (mono , di or triglycerides) 2 EXTRACTION OF[.] ...
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Diseño de una planta para la obtención de carbón activado a partir de neumáticos de automóvil fuera de uso (NFU's)
... 2.3 Evaluación del comportamiento de los NFU’s en el proceso de activación física con CO2 y H2O 2.3.1 Ensayos de activación física con CO2 a escala de laboratorio en horno tubular 2.3.1.[r] ...
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Lingin depolymerization by supercritical water ultrafast reactions
... and supercritical fluids-assisted ...in supercritical fluids and the depolymerization process proceeds with high ...of supercritical fluids for lignin depolymerization presents a problem related to ...
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MEASURING AND MODELING OF THERMODYNAMIC SOLUBILITY OF BIOACTIVE PHYTOCHEMICALS COMPOUNDS IN SUPERCRITICAL CARBON DIOXIDE: NOBILETIN + CO2 AND MENADIONE + CO2
... There are several technical options to avoid negative feedback of sampling on the state in the equilibrium cell [59]. Using a large equilibrium cell or taking small samples through capillaries or special valves reduces ...
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Understanding biomass fractionation in subcritical & supercritical water
... phenolic compounds from defatted rice bran (residence time = 10 min). Sugars yield from cellulose hydrolysis in hydrothermal medium along. 1457[r] ...
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