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Kinetic Study of the Isomerization of Glucose into Fructose in the Presence of Anion‐modified Hydrotalcites
Author(s) -
Lecomte Jérôme,
Finiels Annie,
Moreau Claude
Publication year - 2002
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/1521-379x(200202)54:2<75::aid-star75>3.0.co;2-f
Subject(s) - hydrotalcite , isomerization , hydroxide , selectivity , fructose , chemistry , catalysis , carbonate , inorganic chemistry , nuclear chemistry , organic chemistry
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 towards fructose was unchanged.