Rapid quantification and characterization of the pyrolytic lignin fraction of bio-oils by size exclusion chromatography coupled with multi-angle laser light scattering detector (SEC-MALS)

Ruiz Miguel, Valette Jérémy, Broust François, Bonfils Frédéric. 2019. Rapid quantification and characterization of the pyrolytic lignin fraction of bio-oils by size exclusion chromatography coupled with multi-angle laser light scattering detector (SEC-MALS). Journal of Analytical and Applied Pyrolysis, 142:104662, 8 p.

https://doi.org/10.1016/j.jaap.2019.104662

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Quartile : Q1, Sujet : CHEMISTRY, ANALYTICAL / Quartile : Q1, Sujet : ENGINEERING, CHEMICAL / Quartile : Q2, Sujet : ENERGY & FUELS

Résumé : A rapid method was developed to characterize the Pyrolytic Lignin (PL) fraction of flash pyrolysis bio-oils, based on size exclusion chromatography (SEC) coupled to differential refractive index (DRI) and multi-angle laser light scattering (MALS) detectors. Two beech wood bio-oils with different PL content were used in the study. The first was produced with a single-stage condensation system (BO), while the second was an organic fraction collected in the first stage of a two-stage condensation system (F1). PL was isolated from both the BO and F1 bio-oils by the water precipitation method. Our results suggested that quantification of the pyrolytic lignin fraction of bio-oils can be performed by the SEC-MALS-DRI method provided that the specific refractive index increment (dn/dc) is known, and the integration interval is carefully chosen. Average molar mass (Mn) values for the BO and F1 samples were 580 ± 50 Da and 890 ± 50 Da, respectively. Our results indicated that the condensation system and the water precipitation method affect the average molar mass of isolated PL oligomers.

Mots-clés Agrovoc : bioénergie, pyrolyse

Mots-clés complémentaires : Pyrolyse flash

Classification Agris : P06 - Sources d'énergie renouvelable
K50 - Technologie des produits forestiers
U30 - Méthodes de recherche

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

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