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Assessing the enzyme activity of different plant extracts of biomasses from Sub-Saharan Africa for ethyl biodiesel production

Moussavou Mounguengui Rédéo Wilfried, Brunschwig Christel, Baréa Bruno, Villeneuve Pierre, Blin Joël. 2016. Assessing the enzyme activity of different plant extracts of biomasses from Sub-Saharan Africa for ethyl biodiesel production. Energy and Fuels, 30 (3) : pp. 2356-2364.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : ENGINEERING, CHEMICAL / Quartile : Q2, Sujet : ENERGY & FUELS

Abstract : This work focused on identifying plant biomasses as potential sources of lipases and their use as biocatalysts for ethyl biodiesel production. To that end, plant extracts prepared from dormant and germinated seeds of eight local (Burkina Faso) oil-bearing biomasses were tested as a biocatalyst for the hydrolysis and ethanol transesterification of sunflower oil. The optimum transesterification conditions with the most active extracts were then determined. The results of the hydrolysis and transesterification tests showed that the plant extracts from germinated Jatropha curcas (JG) and Moringa oleifera (MG) seeds contained lipases whose catalytic activity could be utilized without prior purification. The highest hydrolysis yield obtained was 88% using the JG extracts and 62% with the MG extracts after 24 h of reaction at 40 °C and at pH 7. For transesterification, the highest ethyl ester yield obtained was 94% with the JG extracts and 48% with the MG extracts after 144 h at 37 °C, following two successive transesterification reactions. Using the plant extracts in transesterification called for the stepwise addition of ethanol in a TAG:ethanol molar ratio of 1:0.3 at 6 h intervals to overcome the inhibiting effect of high ethanol concentrations on the catalytic activity of the plant extracts. In addition, a study on the influence of the reaction conditions showed that water had a negligible effect on transesterification yield when its content in the ethanol was lower than or equal to 5% (v/v) and that adding silica to the reaction medium led to an increase in transesterification yield. (Résumé d'auteur)

Mots-clés Agrovoc : Lipase, Extrait d'origine végétale, Bioénergie, Biodiésel, Activité enzymatique, Azadirachta indica, Vitellaria paradoxa, Mangifera indica, Jatropha curcas, Moringa oleifera, Arachis hypogaea, Anacardium occidentale, Balanites aegyptiaca, Huile de tournesol, Production énergétique, Biomasse, Estérification, Hydrolyse enzymatique

Mots-clés géographiques Agrovoc : Afrique au sud du Sahara, Burkina Faso

Mots-clés complémentaires : Transestérification

Classification Agris : Q60 - Processing of non-food or non-feed agricultural products
P06 - Renewable energy resources

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

  • Moussavou Mounguengui Rédéo Wilfried, 2IE (BFA)
  • Brunschwig Christel, 2IE (BFA)
  • Baréa Bruno, CIRAD-PERSYST-UMR IATE (FRA)
  • Villeneuve Pierre, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0000-0003-1685-1494
  • Blin Joël, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0001-6715-2453

Source : Cirad-Agritrop (https://agritrop.cirad.fr/579873/)

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