Glucose-fructose isomerisation promoted by basic hybrid catalysts - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Catalysis Today Année : 2012

Glucose-fructose isomerisation promoted by basic hybrid catalysts

R. O. L. Souza
  • Fonction : Auteur
D. P. Fabiano
  • Fonction : Auteur
C. Feche
  • Fonction : Auteur
F. Rataboul
D. Cardoso
  • Fonction : Auteur
N. Essayem

Résumé

As-synthesised mesoporous ordered molecular sieves of the M41S family, containing their organic template and used without any pretreatment, were shown to be efficient weak basic catalysts in glucose-fructose isomerisation in water at 100 degrees C. Selectivities higher than 80% were obtained for glucose conversion higher than 20%. By comparison, NaOH catalysed glucose-fructose isomerisation operates at lower temperature, but the selectivity is shown to be more strongly dependent on the duration and on the temperature of the reaction. Interestingly, a more conventional inorganic stronger solid base, such as zirconia promoted with Cs, is less active and requires higher reaction temperature, 150 degrees C, to isomerise glucose into fructose or a pretreatment at high temperature aimed to remove the strongly adsorbed carbonate species. The superiority of the hybrid organic bases compared to the inorganic stronger solid base is correlated to the presence of a high number of weak basic sites intermediate between chemisorption and physisorption, resistant towards irreversible CO2 poisoning. This is demonstrated by calorimetry of CO2 adsorption. (C) 2012 Elsevier B. V. All rights reserved.

Dates et versions

hal-00777519 , version 1 (17-01-2013)

Identifiants

Citer

R. O. L. Souza, D. P. Fabiano, C. Feche, F. Rataboul, D. Cardoso, et al.. Glucose-fructose isomerisation promoted by basic hybrid catalysts. Catalysis Today, 2012, 195, pp.114-119. ⟨10.1016/j.cattod.2012.05.046⟩. ⟨hal-00777519⟩
84 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More