Numerical modeling and evaluation of solid-liquid extraction with pressurized hot water extraction applied to Robinia Pseudoacacia wood

Sangare Diakaridia, Caré Flore, Buron Frédéric, Lafite Pierre, Bostyn Stéphane. 2024. Numerical modeling and evaluation of solid-liquid extraction with pressurized hot water extraction applied to Robinia Pseudoacacia wood. Chemical Engineering and Processing, 195:109605, 14 p.

Résumé : Computational Fluid Dynamics (CFD) simulation was used to study the solid-liquid extraction of Robinia Pseudoacacia wood by pressurized hot water extraction (PHWE). The proposed model couples momentum and mass transfer, including the extraction kinetics. The model is based on transport species and flow in a porous medium. The results show that the extraction of the two main flavonoids, Dihydrorobinetin (DHR) and Robinetin (Rob), increased with increasing temperature up to 120 °C, with values of 46.85±1.44 and 6.84±0.42 mg/gdB, respectively. However, at higher temperatures, these flavonoids degraded. Additionally, the exhaustive extraction cycle, ranging from 80 to 160 °C, was found to be less effective when compared to extraction at 120 °C.The kinetic parameters were included in the CFD simulation. As a result, a good agreement between the results of CFD simulation and experimental data was found with R2 > 0.97. The model predicts the temperature distribution inside the reactor during the pre-heating period, the evolution of the DHR and Rob concentrations at the reactor outlet, and the effect of degradation at high extraction temperatures.

Mots-clés Agrovoc : modèle de simulation, modèle mathématique, bois, température, propriété physicochimique, Robinia pseudoacacia, dynamique des fluides, Robinia, extraction par pression

Mots-clés libres : Robinia pseudoacacia, PHWE, Robinetin, Dihydrorobinetin, Finite element method, CFD modeling

Classification Agris : K50 - Technologie des produits forestiers
U10 - Informatique, mathématiques et statistiques

Champ stratégique Cirad : CTS 7 (2019-) - Hors champs stratégiques

Agences de financement hors UE : Conseil Régional du Centre-Val de Loire

Projets sur financement : (FRA) Procédés Intégrés Eco-Responsables pour des ingrédients Cosmétiques

Auteurs et affiliations

• Sangare Diakaridia, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0002-6643-5512 - auteur correspondant
• Caré Flore, Université d'Orléans (FRA)
• Buron Frédéric, Université d'Orléans (FRA)
• Lafite Pierre, Université d'Orléans (FRA)
• Bostyn Stéphane, CNRS (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/607941/)

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