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Article Dans Une Revue RSC Sustainability Année : 2023

Sequential extraction of high-value added molecules from grape pomaces using supercritical fluids with water as a co-solvent

"Extraction séquentielle de molécules à haute valeur ajoutée à partir de pulpes de raisin en utilisant des fluides supercritiques avec l'eau comme co-solvant

Gayane Hayrapetyan
Karen Trchounian
  • Fonction : Auteur
Laurine Buon
  • Fonction : Collaborateur
Laurence Noret
  • Fonction : Collaborateur
Benoît Pinel
  • Fonction : Collaborateur
Jeremy Lagrue
  • Fonction : Collaborateur

Résumé

Inspired by the concept of organic waste valorisation and heading towards a sustainable economy, a green chemistry extraction technique involving supercritical carbon dioxide (SC-CO2) along with water as a cosolvent was employed for the main winery by-product (grape pomaces). The objective was to selectively extract high-value added molecules, in particular phenolic compounds and polysaccharides. The experimental design involved applying three distinct temperature conditions (40, 60, and 80 °C), and a constant pressure of 400 bar. Phenolic compounds and high-molecular weight isolates (449-478 kDa) containing low methoxyl (% DE = 23) pectic substances were detected in the SC-CO 2 extracts accompanied by water as a co-solvent. The phenolic acids, namely, gallic (GA), protocatechuic (PCA), coumaric (CouA), and caftaric (CTA), and flavonoids, namely, procyanidin B1 (PRC B1), procyanidin B 2 (+) (PRC B 2), (+) catechin (CT), and (−) epicatechin (ECT) were found in all the extracts under the tested experimental conditions. The following study underscores the potential of the pressurized CO 2 /H 2 O medium as an effective solvent with minimal environmental impacts for the comprehensive valorisation of the main winery by-product, specifically targeting polysaccharides and phenolic compounds. Sustainability spotlight This study focuses on the extraction of valuable molecules such as polyphenols and bers from grape pomace, a by-product of wine production, using a green chemistry technique called supercritical uid extraction. These extracted molecules have potential applications as antioxidants in wine production. The research highlights the signicance of specic United Nations sustainable development goals, including affordable and clean energy (SDG 7), industry, innovation, and infrastructure (SDG 9), and climate action (SDG 13).
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Dates et versions

hal-04233673 , version 1 (09-10-2023)

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Gayane Hayrapetyan, Karen Trchounian, Laurine Buon, Laurence Noret, Benoît Pinel, et al.. Sequential extraction of high-value added molecules from grape pomaces using supercritical fluids with water as a co-solvent. RSC Sustainability, 2023, ⟨10.1039/d3su00183k⟩. ⟨hal-04233673⟩

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