期刊
CHEMICAL ENGINEERING JOURNAL
卷 299, 期 -, 页码 112-119出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.04.009
关键词
Hierarchical Beta zeolite; Carbon-silica composite monolith; Reversed crystal-growth route; Fructose conversion
资金
- National Natural Science Foundation of China [91545103, 21273071]
- Science and Technology Commission of Shanghai Municipality [13JC1401902, 10dz2220500]
A direct synthetic route for hierarchical Beta zeolite has been developed via steam-assisted crystallization (SAC) of carbon-silica composite monolith. SEM and TEM observations show that Hier-Beta zeolites are rough spheres (diameter: 500-600 nm), composed of connected nanoparticles and have single crystallinity. Deep investigation shows that the growth of the zeolite spheres undergo a reverse crystal growth route - surface-to-core crystallization. Such materials demonstrate the greatly enhanced catalytic activity in the dehydration of fructose into 5-hydroxymethylfurfural (HMF), because of the intracrystalline mesoporous structure and efficient diffusion of reactant/product molecules. (C) 2016 Elsevier B.V. All rights reserved.
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