Kinetic study of the isomerization of glucose into fructose in the presence of anion-modified hydrotalcites
Isomerization of glucose to fructose was performed in a batch mode at 363 K in the presence of a commercial hydrotalcite catalyst, namely DHT-4A2 from Kyowa, in its carbonate, hydroxide or mixed carbonate-hydroxide form. Catalysts in their total or partial hydroxide form were found to be both more active and slightly more selective for fructose than in the carbonate form. However, in all cases, the high selectivity observed (=? 90%) tends to drop relatively rapidly after 15% of glucose conversion. Nevertheless, in contrast to cation-exchanged zeolites, no lixiviation phenomenon was observed. The recycled catalyst was as active as a fresh sample and the selectivity to-wards fructose was unchanged.
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| Main Authors: | , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | Q04 - Composition des produits alimentaires, fructose, glucose, isomérisation, http://aims.fao.org/aos/agrovoc/c_3118, http://aims.fao.org/aos/agrovoc/c_3287, http://aims.fao.org/aos/agrovoc/c_27561, |
| Online Access: | http://agritrop.cirad.fr/530772/ http://agritrop.cirad.fr/530772/1/ID530772.pdf |
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