Degradation of cellulose in dilute aqueous solutions of acidic ionic liquid 1 - (1 - Propylsulfonic) - 3 - methylimidazolium chloride, and p - toluenesulfonic acid at moderate temperatures and pressures / Ananda S. Amarasekara in Industrial & engineering chemistry research, Vol. 50 N° 21 (Novembre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 12276-12280 Titre : Degradation of cellulose in dilute aqueous solutions of acidic ionic liquid 1 - (1 - Propylsulfonic) - 3 - methylimidazolium chloride, and p - toluenesulfonic acid at moderate temperatures and pressures Type de document : texte imprimé Auteurs : Ananda S. Amarasekara, Auteur ; Bernard Wiredu, Auteur Année de publication : 2011 Article en page(s) : pp. 12276-12280 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ionic liquid Aqueous solution Résumé : Dilute aqueous solutions of 1-(1-propylsulfonic)-3-methylimidazolium chloride and p-toluenesulfonic acid are shown to be better catalysts than aqueous sulfuric acid of the same H+ ion concentration for the degradation of cellulose at moderate temperatures and pressures. For example, Sigmacell cellulose (DP ≈ 450) in aqueous solutions of 1-(1-propylsulfonic)-3-methylimidazolium chloride, p-toluenesulfonic acid, and sulfuric acid of the same acid strength (0.0321 mol H+ ion/L) produced total reducing sugar (TRS) yields of 28.5%, 32.6%, and 22.0%, respectively, after heating at 170 °C for 3.0 h. In the same set of experiments, glucose yields of 22.2%, 21.0%, and 16.2% were attained in 1-(1-propylsulfonic)-3-methylimidazolium chloride, p-toluenesulfonc acid, and sulfuric acid mediums, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697547 [article] Degradation of cellulose in dilute aqueous solutions of acidic ionic liquid 1 - (1 - Propylsulfonic) - 3 - methylimidazolium chloride, and p - toluenesulfonic acid at moderate temperatures and pressures [texte imprimé] / Ananda S. Amarasekara, Auteur ; Bernard Wiredu, Auteur . - 2011 . - pp. 12276-12280. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 12276-12280 Mots-clés : Ionic liquid Aqueous solution Résumé : Dilute aqueous solutions of 1-(1-propylsulfonic)-3-methylimidazolium chloride and p-toluenesulfonic acid are shown to be better catalysts than aqueous sulfuric acid of the same H+ ion concentration for the degradation of cellulose at moderate temperatures and pressures. For example, Sigmacell cellulose (DP ≈ 450) in aqueous solutions of 1-(1-propylsulfonic)-3-methylimidazolium chloride, p-toluenesulfonic acid, and sulfuric acid of the same acid strength (0.0321 mol H+ ion/L) produced total reducing sugar (TRS) yields of 28.5%, 32.6%, and 22.0%, respectively, after heating at 170 °C for 3.0 h. In the same set of experiments, glucose yields of 22.2%, 21.0%, and 16.2% were attained in 1-(1-propylsulfonic)-3-methylimidazolium chloride, p-toluenesulfonc acid, and sulfuric acid mediums, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697547

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