Journal
CATALYSIS COMMUNICATIONS
Volume 156, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2021.106324
Keywords
Glucose isomerization; HY zeolite; Lewis acid; Fixed bed reactor; Fructose
Categories
Funding
- National Key R&D Program of China [2018YFB1501602]
- National Natural Science Foundation of China [21875276]
- Shanxi Science and Technology Innovation Team of Biofuels & Chemicals, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, P R China
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The isomerization of glucose using HZSM-5, H beta, HY, and USY zeolites showed excellent selectivity towards fructose, with HY zeolite exhibiting high Lewis acid density and large porous structure that facilitate the reaction.
HZSM-5, H beta, HY and USY zeolites were applied to the isomerization of glucose. An excellent selectivity (96%) of fructose was achieved, catalyzed by HY zeolite in gamma-butyrolactone/H2O over the fixed bed reactor. Moreover, the glucose isomerization could be carried out for over 480 h under the optimal conditions. High density of Lewis acid (0.27 mmol.g(-1)) over HY facilitates the intramolecular C-2 -> C-1 H-shift reaction over the glucopyranose ring, which is the rate-determining step during Lewis acid-catalyzed steps of the glucose isomerization. Besides, large porous structure of HY zeolite (7.4 angstrom) facilitates the isomerization of glucose.
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