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)
2019
Ruiz, Miguel | Valette, Jeremy | Broust, François | Bonfils, Frédéric | BioWooEB (UPR BioWooEB) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM) | Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | ANR CATAPULT project (“Catalyst for the production of chemical and bio-fuels”) | ANR-13-BIME-0005,CATAPULT,CATAlyse en Pyrolyse pour une co-valorisation de bio-hUiLes en chimie et carburanTs(2013)
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Show more [+] Less [-]English. 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 biooils 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.
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