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Catalytic Dehydration of Carbohydrates on In Situ Exfoliatable Layered Niobic Acid in an Aqueous System under Microwave Irradiation
Author(s) -
Wu Qingbin,
Yan Yani,
Zhang Qian,
Lu Jinhua,
Yang Zhijian,
Zhang Yahong,
Tang Yi
Publication year - 2013
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201300004
Subject(s) - catalysis , dehydration , aqueous solution , yield (engineering) , hydrolysis , chemistry , chemical engineering , substrate (aquarium) , materials science , organic chemistry , biochemistry , oceanography , engineering , metallurgy , geology
A simple and efficient microwave‐assisted HNb 3 O 8 catalytic process is proposed for the dehydration of carbohydrates in the aqueous phase. A 5‐hydroxymethylfurfural (HMF) yield of 55.9 % was achieved at a high substrate/catalyst weight ratio of 50 from a 10 wt % fructose solution, which is close to the yield achieved by homogeneous aqueous systems. The critical factor for this performance is the fast in situ exfoliation of layered HNb 3 O 8 with the aid of microwave irradiation, which leads to quasi‐homogeneous catalytic behavior. Importantly, the catalytic system is also applicable for the one‐pot production of HMF from di‐ and polysaccharides, such as inulin, through a consecutive hydrolysis–dehydration reaction. Additionally, the unique restacking feature of the exfoliated HNb 3 O 8 ensures the good reusability of the catalyst.