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Fractionating pentosans and hexosans in hybrid poplar / Chunhui Zhang in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 133-139 Titre : Fractionating pentosans and hexosans in hybrid poplar Type de document : texte imprimé Auteurs : Chunhui Zhang, Auteur ; Troy Runge, Auteur Année de publication : 2012 Article en page(s) : pp. 133-139 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pentosans  Hexosans Résumé : In this paper, a study on the fractionation of pentosans and hexosans from poplar chips was performed using a circulation reactor. The study's methodology created kinetic models of both pentosan and hexosan hydrolysis/degradation to predict the fractionation yield of both substances. The conditions were varied to include a temperature range of 140―170 °C, a sulfuric acid concentration range of 0.1-0.9 wt %, and a constant liquor-to-wood ratio of 6:1. The yields of both substances were favored at high acid concentration and temperature, with pentosan being considerably more reactive. Under optimal conditions, 91% of pentosan (as monomers, oligmers, and degradation products) could be recovered, with more than 93% of hexosan retained in the solids. This study demonstrates that pentosans and hexosans may be fractionated from this biomass using acid hydrolysis, which will enable further processing of relatively homogeneous saccharide streams to create fuels or chemicals. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476455 [article] Fractionating pentosans and hexosans in hybrid poplar [texte imprimé] / Chunhui Zhang, Auteur ; Troy Runge, Auteur . - 2012 . - pp. 133-139. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 133-139 Mots-clés : Pentosans  Hexosans Résumé : In this paper, a study on the fractionation of pentosans and hexosans from poplar chips was performed using a circulation reactor. The study's methodology created kinetic models of both pentosan and hexosan hydrolysis/degradation to predict the fractionation yield of both substances. The conditions were varied to include a temperature range of 140―170 °C, a sulfuric acid concentration range of 0.1-0.9 wt %, and a constant liquor-to-wood ratio of 6:1. The yields of both substances were favored at high acid concentration and temperature, with pentosan being considerably more reactive. Under optimal conditions, 91% of pentosan (as monomers, oligmers, and degradation products) could be recovered, with more than 93% of hexosan retained in the solids. This study demonstrates that pentosans and hexosans may be fractionated from this biomass using acid hydrolysis, which will enable further processing of relatively homogeneous saccharide streams to create fuels or chemicals. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476455