2020
DOI: 10.1016/j.supflu.2020.104825
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Supercritical CO2 extraction of spent coffee grounds. Influence of co-solvents and characterization of the extracts

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Cited by 41 publications
(28 citation statements)
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“…Supercritical fluid extraction (SFE) was carried out in a laboratory apparatus from Applied Separations (model Spe-ed SFE-NP), which allows operation at pressures up to 60.0 MPa and temperatures up to 120 • C, equipped with a 50 cm 3 internal capacity extractor. A detailed description of the SFE apparatus is given elsewhere [38][39][40]. Briefly, liquid CO 2 flowing from a cylinder is compressed to the desired pressure using a circulating pump into the extractor, which is preheated to the desired temperature.…”
Section: Supercritical Fluid Extraction Apparatus and Proceduresmentioning
confidence: 99%
“…Supercritical fluid extraction (SFE) was carried out in a laboratory apparatus from Applied Separations (model Spe-ed SFE-NP), which allows operation at pressures up to 60.0 MPa and temperatures up to 120 • C, equipped with a 50 cm 3 internal capacity extractor. A detailed description of the SFE apparatus is given elsewhere [38][39][40]. Briefly, liquid CO 2 flowing from a cylinder is compressed to the desired pressure using a circulating pump into the extractor, which is preheated to the desired temperature.…”
Section: Supercritical Fluid Extraction Apparatus and Proceduresmentioning
confidence: 99%
“…Among them, SCG are the main by-product remaining after processing coffee in the coffee beverage market, accounting for 50% of the total coffee bean production, and SCG generation is increasing daily with increases in coffee consumption [2]. Extensive attempts have been made to utilize SCG industrially, such as in active substance extraction [3], mushroom cultivation [4], and bioethanol production [1]. Despite these possibilities, the industrial application of SCG is still insufficient.…”
Section: Introductionmentioning
confidence: 99%
“…Indeed, the extraction from grape pomace with the use of supercritical mixtures of CO 2 and water/ethanol (57% v / v ) as co-solvent was shown to give yields of 71.32 mg GAE (Gallic Acid Equivalents) per g of dry weight enriched in flavanols [ 96 ]. The increase of ethanol concentration added within (5–10%) increased the final yield and significantly decreased the extraction time from 100 to 58 min [ 103 ]. However, higher ethanol concentrations could hinder the extraction of the target compounds, since the hydrogen from the ethanol molecule may form hydrogen bonds with the oxygen of other molecules, increasing the required energy to separate ethanol molecules, causing a decrease in the process yield [ 103 ].…”
Section: Green Extraction Process: Synergism Between Solvents and Technologymentioning
confidence: 99%