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dc.contributor.authorAndreu Terrén, Glòria
dc.contributor.authorVidal Lluciá, Teresa
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera
dc.date.accessioned2014-09-09T11:20:27Z
dc.date.created2014-01-01
dc.date.issued2014-01-01
dc.identifier.citationAndreu, M.; Vidal, T. An improved TCF sequence for biobleaching kenaf pulp: influence of the hexenuronic acid content and the use of xylanase. "Bioresource technology", 01 Gener 2014, vol. 152, p. 253-258.
dc.identifier.issn0960-8524
dc.identifier.urihttp://hdl.handle.net/2117/24020
dc.description.abstractEnzymatic delignification with laccase from Trametes villosa used in combination with chemical mediators (acetosyringone, acetovanillone and 1-hydroxybenzotriazole) to improve the totally chlorine-free (TCF) bleaching of kenaf pulp was studied. The best final pulp properties were obtained by using an L-HBT-QPo sequence developed by incorporating a laccase-mediator stage into an industrial bleaching sequence involving chelation and peroxide stages. The new sequence resulted in increased kenaf pulp delignification (90.4%) and brightness (77.2%ISO) relative to a conventional TCF chemical sequence (74.5% delignification and 74.5% brightness). Also, the sequence provided bleached kenaf fibers with high cellulose content (pulp viscosity of 890 g . mL (1) vs 660 g . mL (1)). Scanning electron micrographs revealed that xylanase altered fiber surfaces and facilitated reagent access as a result. However, the LHBTX (xylanase) stage removed 21% of hexenuronic acids in kenaf pulp. These recalcitrant compounds spent additional bleaching reagents and affected pulp properties after peroxide stage. (C) 2013 Elsevier Ltd. All rights reserved.
dc.format.extent6 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera::Blanqueig de pastes
dc.subjectÀrees temàtiques de la UPC::Enginyeria paperera::Primeres matèries papereres::Fustes papereres
dc.subject.lcshWood-pulp--Bleaching
dc.subject.lcshKenaf--Technological innovation
dc.subject.lcshXylanases--Industrial applications
dc.subject.lcshKraft pulping
dc.subject.otherKenaf
dc.subject.otherTCF bleaching sequence
dc.subject.otherLaccase-mediator system (LMS)
dc.subject.otherHexenuronic acids
dc.subject.otherXylanase
dc.subject.otherNATURAL MEDIATOR SYSTEMS
dc.subject.otherKRAFT PULPS
dc.subject.otherCHEMICAL PULPS
dc.subject.otherIMPACT
dc.subject.otherECF
dc.titleAn improved TCF sequence for biobleaching kenaf pulp: influence of the hexenuronic acid content and the use of xylanase
dc.typeArticle
dc.subject.lemacKenak, fibra de -- Blanqueig
dc.subject.lemacPaper -- Blanqueig
dc.subject.lemacPasta de paper -- Blanqueig
dc.contributor.groupUniversitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera
dc.identifier.doi10.1016/j.biortech.2013.11.014
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac12906865
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorAndreu, M.; Vidal, T.
local.citation.publicationNameBioresource technology
local.citation.volume152
local.citation.startingPage253
local.citation.endingPage258


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