Kinetics of hardwood carbohydrate degradation during kraft pulp cooking / Ricardo B. Santos in Industrial & engineering chemistry research, Vol. 51 N° 38 (Septembre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 38 (Septembre 2012) . - pp. 12192-12198 Titre : Kinetics of hardwood carbohydrate degradation during kraft pulp cooking Type de document : texte imprimé Auteurs : Ricardo B. Santos, Auteur ; Hasan Jameel, Auteur ; Hou-min Chang, Auteur Année de publication : 2012 Article en page(s) : pp. 12192-12198 Note générale : industrial chemistry Langues : Anglais (eng) Mots-clés : Hardwood Kinetics Résumé : Most of the studies on hardwood carbohydrate degradation focus upon the understanding of carbohydrate behavior of a single wood species. These studies tend to determine the activation energies associated with the three different cooking phases and for the different reactions that participate in carbohydrate degradation. In the current study, a variety of hardwood species were comprehensively characterized and the kinetics of carbohydrate degradation was studied. The kinetics of glucan, xylan, and total carbohydrate dissolution during the bulk phase of the kraft pulping process were investigated. A wide range of carbohydrate dissolution rates was obtained and correlated to chemical features and delignification rates for nine different hardwood species. It was determined that carbohydrate dissolution was dependent upon the rate of delignification. Species with high carbohydrate dissolution also presented high lignin removal rates. Our results indicate that the presence of lignin carbohydrate complexes positively influences pulping process selectivity during the bulk reaction phase. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26399668 [article] Kinetics of hardwood carbohydrate degradation during kraft pulp cooking [texte imprimé] / Ricardo B. Santos, Auteur ; Hasan Jameel, Auteur ; Hou-min Chang, Auteur . - 2012 . - pp. 12192-12198. industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 38 (Septembre 2012) . - pp. 12192-12198 Mots-clés : Hardwood Kinetics Résumé : Most of the studies on hardwood carbohydrate degradation focus upon the understanding of carbohydrate behavior of a single wood species. These studies tend to determine the activation energies associated with the three different cooking phases and for the different reactions that participate in carbohydrate degradation. In the current study, a variety of hardwood species were comprehensively characterized and the kinetics of carbohydrate degradation was studied. The kinetics of glucan, xylan, and total carbohydrate dissolution during the bulk phase of the kraft pulping process were investigated. A wide range of carbohydrate dissolution rates was obtained and correlated to chemical features and delignification rates for nine different hardwood species. It was determined that carbohydrate dissolution was dependent upon the rate of delignification. Species with high carbohydrate dissolution also presented high lignin removal rates. Our results indicate that the presence of lignin carbohydrate complexes positively influences pulping process selectivity during the bulk reaction phase. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26399668

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