Afficher la notice abrégée

Anthraquinone polymer catalysts for alkaline delignification and action on a phenolic beta-O-4 lignin model in kraft pulping conditions

dc.rights.licenseopen
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
dc.contributor.authorCAZEILS, Emmanuel
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
dc.contributor.authorMEGIATTO, Jackson D., Jr.
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
dc.contributor.authorGARDRAT, Christian
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 2 LCPO : Biopolymers & Bio-sourced Polymers
dc.contributor.authorHAM-PICHAVANT, Frédérique
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 2 LCPO : Biopolymers & Bio-sourced Polymers
dc.contributor.authorGRELIER, Stéphane
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 2 LCPO : Biopolymers & Bio-sourced Polymers
dc.contributor.authorCASTELLAN, Alain
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2012
dc.identifier.issn0018-3830
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/20483
dc.description.abstractEnThe delignification action of four new anthraquinone (AQ) polystyrene catalysts - three of them linear (CP-A, CP-B, CP-C) and one cross-linked (CP-3D) - were investigated on softwood (Pinus pinaster) chips under kraft pulping conditions, and their catalytic efficiency gains (EGs) were compared to that of AQ, with EG(AQ) = 100. The catalytic EG of the hydrophobic polymers CP-B and CP-3D was 96%, while the inherent hydrophilic catalyst CP-C showed an EG of 30%. Interpretation: hydrogen sulfide anions presented in the kraft pulp liquor might participate in the delignification mechanisms as redox active mediators in the case of the hydrophobic polymers. Moreover, the latter could be recovered after pulping, and delignification tests with the recovered materials revealed that they preserved their catalytic properties. Mechanistic studies were carried out with a phenolic beta-O-4 lignin model compound in the presence or absence of glucose (mimicking the carbohydrate end groups) and/or NaSH. It was shown that the cross-linked CP-3D polymer reacted with the lignin model through electron transfer reactions, a process most likely mediated by glucose and HS- redox active species. The concept of grafting AQ into polymeric substrates is discussed in terms of reusable delignification catalysts for large-scale pulping processes under kraft conditions.
dc.language.isoen
dc.publisherDe Gruyter
dc.subject.enpulping catalysts
dc.subject.enpolystyrene copolymers
dc.subject.enelectron transfer reactions
dc.subject.enkraft pulping
dc.subject.enlignin model
dc.subject.enanthraquinone
dc.title.enAnthraquinone polymer catalysts for alkaline delignification and action on a phenolic beta-O-4 lignin model in kraft pulping conditions
dc.typeArticle de revue
dc.identifier.doi10.1515/hf-2011-0255
dc.subject.halChimie/Polymères
bordeaux.journalHolzforschung
bordeaux.page699-704
bordeaux.volume66
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.issue6
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-00747645
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00747645v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Holzforschung&rft.date=2012&rft.volume=66&rft.issue=6&rft.spage=699-704&rft.epage=699-704&rft.eissn=0018-3830&rft.issn=0018-3830&rft.au=CAZEILS,%20Emmanuel&MEGIATTO,%20Jackson%20D.,%20Jr.&GARDRAT,%20Christian&HAM-PICHAVANT,%20Fr%C3%A9d%C3%A9rique&GRELIER,%20St%C3%A9phane&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée