Acidic depolymerization vs ionic liquid solubilization in lignin extraction from eucalyptus wood using the protic ionic liquid 1-methylimidazolium chloride

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dc.contributor.authorOvejero Pérez, Antonio
dc.contributor.authorRigual Hernández, Victoria De Los Ángeles
dc.contributor.authorDomínguez Toribio, Juan Carlos
dc.contributor.authorAlonso Rubio, María Virginia
dc.contributor.authorOliet Pala, María Mercedes
dc.contributor.authorRodríguez Somolinos, Francisco
dc.date.accessioned2024-01-19T13:31:53Z
dc.date.available2024-01-19T13:31:53Z
dc.date.issued2020
dc.description.abstractProtic ionic liquids have been proposed as effective solvents for the selective extraction of lignin from wood. In this work, the protic ionic liquid 1-methylimidazolium chloride has been used to extract lignin at different biomass loadings, temperatures, and times to understand the influence of treatment severity on the lignin dissolution mechanism. Themaximumlignin recovery (82.35 g lignin/100 g biomass lignin) was achieved at 10% (w/w) biomass loading, 135 °C, and 6 h. An increase in treatment severity leads to an acid cleavage of ether linkages, which increases the average molecular weight and thermal stability of lignins due to C-C repolymerization. HSQC-NMR analysis showed the effect of operating conditions on the predominant mechanismof lignin depolymerization. Atmild conditions, there is a preferential degradation of G units (the typical depolymerization mechanism of ionic liquid treatments); but at the most severe conditions, S units are predominantly removed, as usually occurs in acidic treatments. This work contributes to better understanding the different lignin extraction mechanisms occurring with a protic ionic liquid depending on different operating conditions.
dc.description.departmentDepto. de Ingeniería Química y de Materiales
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.statuspub
dc.identifier.citationOvejero-Pérez, Antonio, et al. «Acidic Depolymerization vs Ionic Liquid Solubilization in Lignin Extraction from Eucalyptus Wood Using the Protic Ionic Liquid 1-Methylimidazolium Chloride». International Journal of Biological Macromolecules, vol. 157, agosto de 2020, pp. 461-69. DOI.org (Crossref), https://doi.org/10.1016/j.ijbiomac.2020.04.194.
dc.identifier.doi10.1016/j.ijbiomac.2020.04.194
dc.identifier.issn0141-8130
dc.identifier.officialurlhttps://doi.org/10.1016/j.ijbiomac.2020.04.194
dc.identifier.urihttps://hdl.handle.net/20.500.14352/94081
dc.issue.number157
dc.language.isoeng
dc.page.final469
dc.page.initial461
dc.relation.hasversionVoC
dc.rights.accessRightsrestricted access
dc.subject.keywordLignin extraction, Lignin characterization, Depolymerization mechanism
dc.subject.ucmCiencias
dc.subject.unesco33 Ciencias Tecnológicas
dc.titleAcidic depolymerization vs ionic liquid solubilization in lignin extraction from eucalyptus wood using the protic ionic liquid 1-methylimidazolium chloride
dc.typejournal article
dspace.entity.typePublication
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relation.isAuthorOfPublication.latestForDiscovery1520a811-1577-442b-8341-fa21a5118580
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