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Xylanase treatment of eucalyptus pulps in different chemical bleaching stages
dc.contributor.author | Ariza, María |
dc.contributor.author | Barneto, A. G. |
dc.contributor.author | Vidal Lluciá, Teresa |
dc.contributor.author | Ariza, J. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera |
dc.date.accessioned | 2014-07-10T08:16:17Z |
dc.date.created | 2014 |
dc.date.issued | 2014 |
dc.identifier.citation | Ariza, M. [et al.]. Xylanase treatment of eucalyptus pulps in different chemical bleaching stages. A: European Workshop on Lignocellulosics and Pulp. "Proceedings of the 13th European workshop on Lignocellulosics and pulp". Sevilla: 2014, p. 175-178. |
dc.identifier.isbn | 978-84-616-9842-4 |
dc.identifier.uri | http://hdl.handle.net/2117/23463 |
dc.description.abstract | Xylanase significantly reduces the kappa number but almost not modifies brightness and viscosity in studied pulps. On average, xylanase decreases the kappa number of chemical pulps 25 %. This intense effect on the kappa number can be explained by enzymatic hydrolysis of hemicellulose. We proved that xylanase treatment on P0 pulp (first chlorine dioxide step) yield a kappa number reduction higher than obtained by chemical PO and D1 steps together. On the other hand, thermogravimetric analysis shows that xylanase treatment has influence on the thermal degradation path of pulps. As general rule, control treatment (with TrisHCl buffer but without enzyme) leads broads cellulose degradation peak, shown that chlorhydrate of tris(hydroxymethyl) aminoethane adsorb on cellulose surface increasing paracrystalline cellulose content, that is, not-ordered surface crystalline cellulose. When TrisHCl and xylanase are used together, adsorption is less important. In any case, in xylanase-treated pulps cellulose thermally degrades in broader temperature interval than in initial pulps |
dc.format.extent | 4 p. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera |
dc.subject | Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera::Blanqueig de pastes |
dc.subject.lcsh | Wood-pulp--Bleaching |
dc.title | Xylanase treatment of eucalyptus pulps in different chemical bleaching stages |
dc.type | Conference lecture |
dc.subject.lemac | Pasta de paper -- Blanqueig |
dc.contributor.group | Universitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera |
dc.relation.publisherversion | http://www.irnas.csic.es/users/delrio/Proceedings-13thEWLP.pdf |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 14971117 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Ariza, M.; Barneto, A.; Vidal, T.; Ariza, J. |
local.citation.contributor | European Workshop on Lignocellulosics and Pulp |
local.citation.pubplace | Sevilla |
local.citation.publicationName | Proceedings of the 13th European workshop on Lignocellulosics and pulp |
local.citation.startingPage | 175 |
local.citation.endingPage | 178 |