Publication
Py-GC/MS(FID) assessed behavior of polysaccharides during kraft delignification of Eucalyptus globulus heartwood and sapwood
| dc.contributor.author | Lourenço, Ana | |
| dc.contributor.author | Gominho, Jorge | |
| dc.contributor.author | V Marques, A | |
| dc.contributor.author | Pereira, Helena | |
| dc.date.accessioned | 2013-10-15T17:45:02Z | |
| dc.date.available | 2013-10-15T17:45:02Z | |
| dc.date.issued | 2013-05 | |
| dc.description.abstract | Eucalyptus globulus heartwood, sapwood and their delignified samples by kraft pulping at 130, 150 and 170 degrees C along time were characterized in respect to total carbohydrates by Py-GC/MS(FID). No significant differences between heartwood and sapwood were found in relation to pyrolysis products and composition. The main wood carbohydrate derived pyrolysis compounds were levoglucosan (25.1%), hydroxyacetaldehyde (12.5%), 2-oxo-propanal (10.3%) and acetic acid (8.7%). Levoglucosan decreased during the early stages of delignification and increased during the bulk and residual phases. Acetic acid decreased hydroxyacetaldehyde and 2-oxo-propanal increased, and 2-furaldehyde and hydroxypropanone remained almost constant during delignification. The C/L ratio was 3.2 in wood and remained rather constant in the first pulping periods until a loss of 15-25% in carbohydrate and 60% in lignin. Afterwards it increased sharply until 44 that correspond to the removal of 25-35% of carbohydrates and 95% of lignin. The pulping reactive selectivity to lignin vs. polysaccharides was the same for sapwood and heartwood. (C) 2013 Elsevier B.V. All rights reserved. | por |
| dc.identifier.citation | Lourenço, Ana; Gominho, Jorge; Marques, Antonio Velez; Pereira, Helena - Py-GC/MS(FID) assessed behavior of polysaccharides during kraft delignification of Eucalyptus globulus heartwood and sapwood. Journal of Analytical and Applied Pyrolysis. ISSN 0165-2370. Vol. 101, (2013), p. 142-149. | por |
| dc.identifier.issn | 0165-2370 | |
| dc.identifier.other | 10.1016/j.jaap.2013.01.018 | |
| dc.identifier.uri | http://hdl.handle.net/10400.21/2729 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier Science BV | por |
| dc.subject | Eucalyptus globulus | por |
| dc.subject | Pyrolysis | por |
| dc.subject | Polysaccharides | por |
| dc.subject | Levoglucosan | por |
| dc.subject | C/L ratio | por |
| dc.title | Py-GC/MS(FID) assessed behavior of polysaccharides during kraft delignification of Eucalyptus globulus heartwood and sapwood | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Amsterdam | por |
| oaire.citation.endPage | 149 | por |
| oaire.citation.startPage | 142 | por |
| oaire.citation.title | Journal of Analytical and Applied Pyrolysis | por |
| oaire.citation.volume | 101 | por |
| person.familyName | Marques | |
| person.givenName | António | |
| person.identifier.orcid | 0000-0001-7421-6363 | |
| person.identifier.scopus-author-id | 7202134785 | |
| rcaap.rights | restrictedAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | b3d0c7ab-dc57-45a9-a86b-6f99a6232f34 | |
| relation.isAuthorOfPublication.latestForDiscovery | b3d0c7ab-dc57-45a9-a86b-6f99a6232f34 |