Extraction of homogeneous lignin oligomers by ozonation of Miscanthus giganteus and vine shoots in a pilot scale reactor
2024
Ebrahimi, M. | Acha, V. | Hoang, L. | Martínez-Abad, Antonio | López-Rubio, Amparo | Rhazi, L. | Aussenac, T. | Région Hauts-de-France | Ebrahimi, M. [0000-0001-5399-2929] | Acha, V. [0000-0002-8094-4049] | Hoang, L. [0009-0002-2688-3078] | Martínez-Abad, Antonio [0000-0002-6656-2917] | López-Rubio, Amparo [0000-0001-6469-9402] | Aussenac, T. [0000-0002-2584-5347] | Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
Lignin, a complex phenolic polymer crucial for plant structure, is mostly used as fuel but it can be harnessed for environmentally friendly applications. This article explores ozonation as a green method for lignin extraction from lignocellulosic biomass, aiming to uncover the benefits of the extracted lignin. A pilot-scale ozonation reactor was employed to extract lignin from Miscanthus giganteus (a grass variety) and vine shoots (a woody biomass). The study examined the lignin extraction and modification of the fractions and identified the generation of phenolic and organic acids. About 48 % of lignin was successfully extracted from both biomass types. Phenolic monomers were produced, vine shoots yielding fewer monomers than Miscanthus giganteus. Ozonation generated homogeneous lignin oligomers, although their molecular weight decreased during ozonation, with vine shoot oligomers exhibiting greater resistance to ozone. Extracted fractions were stable at 200 °C, despite the low molecular weight, outlining the potential of these phenolic fractions.
显示更多 [+] 显示较少 [-]The authors are grateful for the financial support of Hauts-de-France region and UniLaSalle, France, and also the SO and Vine Box projects, Spain. Benoit Lerzy and Annaëlle Buchou are acknowledged for their valuable contributions in technical assistance.
显示更多 [+] 显示较少 [-]Peer reviewed
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