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Acid hydrolysis of prehydrolysis liquor produced from the kraft-based dissolving pulp production process / Guihua Yang in Industrial & engineering chemistry research, Vol. 51 N° 43 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 13902-13907 Titre : Acid hydrolysis of prehydrolysis liquor produced from the kraft-based dissolving pulp production process Type de document : texte imprimé Auteurs : Guihua Yang, Auteur ; M. Sarwar Jahan, Auteur ; Haitang Liu, Auteur Année de publication : 2013 Article en page(s) : pp. 13902-13907 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Manufacturing  process  Hydrolysis Résumé : Acid hydrolysis is an essential step in converting polysaccharides to monosaccharides for the production of fuels and chemicals. The prehydrolysis liquor (PHL) from the kraft-based dissolving pulp production process contains mainly oligosugars with a minor amount of monosugars. In this study, the influence of process conditions, including the sulfuric acid concentration, temperature, and time on the PHL hydrolysis was thoroughly investigated in order to get maximum monosugar concentration with minimal degradation of sugars. The maximum monosugar concentration was obtained at 130 °C for 20 min when the hydrolysis was carried out with 1.78% H2SO4. A high acid concentration (3.33%) increased furfural formation and decreased the monosugar concentration. Acetic acid is generated from the acetyl groups bound to the dissolved hemicelluloses, resulting in a significant increase in the acetic acid concentration in the PHL. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26593316 [article] Acid hydrolysis of prehydrolysis liquor produced from the kraft-based dissolving pulp production process [texte imprimé] / Guihua Yang, Auteur ; M. Sarwar Jahan, Auteur ; Haitang Liu, Auteur . - 2013 . - pp. 13902-13907. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 13902-13907 Mots-clés : Manufacturing  process  Hydrolysis Résumé : Acid hydrolysis is an essential step in converting polysaccharides to monosaccharides for the production of fuels and chemicals. The prehydrolysis liquor (PHL) from the kraft-based dissolving pulp production process contains mainly oligosugars with a minor amount of monosugars. In this study, the influence of process conditions, including the sulfuric acid concentration, temperature, and time on the PHL hydrolysis was thoroughly investigated in order to get maximum monosugar concentration with minimal degradation of sugars. The maximum monosugar concentration was obtained at 130 °C for 20 min when the hydrolysis was carried out with 1.78% H2SO4. A high acid concentration (3.33%) increased furfural formation and decreased the monosugar concentration. Acetic acid is generated from the acetyl groups bound to the dissolved hemicelluloses, resulting in a significant increase in the acetic acid concentration in the PHL. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26593316