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Evaluation and modelling of continuous flow sub-critical water hydrolysis of biomass derived components; lipids and carbohydrates

Baig M.N., Santos R.C.D., King J., Pioch D., Bowra S.. 2013. Chemical Engineering Research and Design, 91 (12) : p. 2663-2670.

Sub-critical water is widely accepted as an environmentally benign solvent, for extraction but also as a catalytic medium therefore has the potential to support processing of multiple components found in biomass. The manuscript demonstrates the versatility of sub-critical water as a generic medium to support hydrolysis of rice bran (carbohydrates) and sunflower oil (lipid substrates), substrates that possess very different physio-chemically properties within a continuous flow process configuration. Response surface methodologies (RSM) were used to assist modelling the multiple process parameters that impact sub-critical water mediate hydrolysis of sunflower oil. Successful validation, of the models illustrate that 100% FFA yield would be achieved at temperature 385 °C; pressure 20 MPa; residence time of 35 min; oil to water ratio 1:1.8 (v/v) represents 65% water. Experiments conducted under these conditions yielded 93.5%, thereby confirming the utility of the RSM as a tool to assist in process development. (Résumé d'auteur)

Mots-clés : riz; son; huile de tournesol; hydrolyse; modèle; lipide; glucide; extraction par solvant; eau; extraction au fluide supercritique; technique analytique; biomasse; son de riz

Thématique : Traitement et conservation des produits alimentaires; Traitement des produits agricoles non alimentaires

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