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Kayıt Tarihi: 2021-13-Ocak
Aktif Durum: Pasif
Gönderilenler: 30
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| Gönderen: 2021-22-Ocak Saat 05:37 | Kayıtlı IP
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Synthesis of 5-hydroxymethylfurfural from highly
concentrated aqueous fructose solutions using activated
carbon
An efficient and environmentally friendly system for
producing 5-hydroxymethylfurfural (5-HMF) from fructose
has been proposed. Substrate concentration is an
important factor for practical application of the
process;
www.yrdcarbon.com
however, use of a high concentration of fructose has
rarely been tested in the reaction because the conditions
accelerate intermolecular side reactions to form adhesive
humins. Humin byproducts stuck on reactor surfaces can
make the production of 5-HMF on an industrial scale
difficult. Therefore, developing a catalytic reaction
system that can promote the synthesis of 5-HMF from
highly concentrated fructose without causing adhesion of
humins to reactors is needed. The present study
demonstrated that activated carbons are promising
materials for this system. Activated carbon catalyzed the
conversion of fructose to 5-HMF without adhesion of
humins to reactor vessels under practical conditions of
high substrate concentration up to 73.2%. The catalytic
activity was determined not only by the amount of surface
weakly acidic oxygenated groups but also by the
adsorption of
fructose-carbon/">activated carbon pellets bulk . In
addition, strong adsorption of 5-HMF led to low
selectivity of 5-HMF and the formation of adhesive
humins. This is the first report to describe the
synthesis of 5-HMF from solutions containing a fructose
concentration greater than 70%.
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Konu: Using activated carbon
