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http://acervodigital.unesp.br/handle/11449/111469
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DC Field | Value | Language |
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dc.contributor.author | Ventorim, Gustavo | - |
dc.contributor.author | Alves, Ericka F. | - |
dc.contributor.author | Penna, Lais S. | - |
dc.contributor.author | Francis, Raymond C. | - |
dc.date.accessioned | 2014-12-03T13:08:41Z | - |
dc.date.accessioned | 2016-10-25T20:08:38Z | - |
dc.date.available | 2014-12-03T13:08:41Z | - |
dc.date.available | 2016-10-25T20:08:38Z | - |
dc.date.issued | 2014-03-01 | - |
dc.identifier | http://www.cellulosechemtechnol.ro/pdf/CCT3-4%282014%29/p.365-373.pdf | - |
dc.identifier.citation | Cellulose Chemistry and Technology. Bucuresti: Editura Acad Romane, v. 48, n. 3-4, p. 365-373, 2014. | - |
dc.identifier.issn | 0576-9787 | - |
dc.identifier.uri | http://hdl.handle.net/11449/111469 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/111469 | - |
dc.description.abstract | The effect of syringyl:guaiacyl (S/G) ratio on kraft pulping and kraft pulping followed by O-2 delignification was investigated with six poplars grown on the same site. The results showed an improvement in the ease of delignification (EOD) when the S/G ratio was increased from a low to a moderately high value. However, above that moderately high value there was no further improvement in EOD with increasing S/G ratio. Kraft pulping followed by elemental chlorine-free (ECF) bleaching was then investigated with three Brazilian eucalypti with S/G ratio of 2.69, 2.46 and 2.41. The chips with S/G = 2.69 had superior EOD compared to the chips with S/G = 2.41. However, pulps from the S/G = 2.69 chips also contained less lignin-carbohydrate complexes (LCC) than corresponding pulps from the chips with S/G = 2.41. LCC are known to retard delignification in both alkaline pulping and ECF bleaching. The S/G ratio of eucalyptus pulp lignins was estimated by nitrobenzene oxidation (NBO) of the pulps and H-1 NMR or their isolated lignins. The S/G ratio decreased from a value of >= 2.46 for the lignin in two eucalyptus chip samples to <= 1.21 for the lignin in their kraft pulps. In general, S units appear to solubilize at a much higher rate than G units during kraft pulping. | en |
dc.description.sponsorship | NSF | - |
dc.description.sponsorship | Andritz Inc. | - |
dc.description.sponsorship | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | - |
dc.format.extent | 365-373 | - |
dc.language.iso | eng | - |
dc.publisher | Editura Acad Romane | - |
dc.source | Web of Science | - |
dc.subject | Hardwood | en |
dc.subject | S/G ratio | en |
dc.subject | lignin-carbohydrate complexes | en |
dc.subject | kraft pulping | en |
dc.subject | ECF bleaching | en |
dc.title | Effect of s/g ratio on kraft pulping and ecf bleaching of some poplars and eucalyptus | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | SUNY Coll Environm Sci & Forestry SUNY ESF | - |
dc.contributor.institution | Universidade Federal de Viçosa (UFV) | - |
dc.contributor.institution | Sci Consultant | - |
dc.description.affiliation | Univ Estadual Paulista, UNESP, Sao Paulo, Brazil | - |
dc.description.affiliation | SUNY Coll Environm Sci & Forestry SUNY ESF, Dept Paper & Bioproc Engn PBE, Syracuse, NY 13210 USA | - |
dc.description.affiliation | Univ Fed Vicosa, Dept Chem Engn, BR-36570000 Vicosa, MG, Brazil | - |
dc.description.affiliation | Sci Consultant, Syracuse, NY 13210 USA | - |
dc.description.affiliationUnesp | Univ Estadual Paulista, UNESP, Sao Paulo, Brazil | - |
dc.description.sponsorshipId | NSFCHE 1105726 | - |
dc.identifier.wos | WOS:000339139600020 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Cellulose Chemistry And Technology | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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