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DatoValore
TitleConversion of fructose into 5-HMF: a study on the behaviour of heterogeneous cerium-based catalysts and their stability in aqueous media under mild conditions
AbstractIn this paper, we present the results of a study on 5-HMF production from fructose by means of heterogeneous catalysts in aqueous media. Mild conditions were used, setting the temperature between 393 K and 443 K. Cerium(IV) phosphates, different from other metal(IV)-phosphates, such as titanium and zirconium, have been characterized only recently. Ce-phosphates are quite complex structures as they show several arrangements. They undergo leaching of the phosphate group as phosphoric acid with consequent slow de-activation of the catalysts. The leaching rate depends on the nature and on the temperature of the calcination of the original phosphates. This opened the question whether the conversion was driven by the heterogeneous catalysts or by the soluble phosphoric acid. A specific test has demonstrated that the solid catalysts are responsible for the conversion of fructose into 5-HMF, more than the liquid phase. We have also demonstrated that the leached phosphate is substituted by fructose on the solid catalyst. A best yield of 52% with selectivity of 93% in batch and 24% in a flow reactor at 443 K (single pass) with a selectivity also > 95% were obtained.
SourceRSC advances 5 (34), pp. 26941–26948
KeywordsHMFFructoseBiomass ValorizationGlucoseCerium Phosphate
JournalRSC advances
EditorRSC Publishing, Cambridge, Regno Unito
Year2015
TypeArticolo in rivista
DOI10.1039/c5ra03358f
AuthorsDibenedetto, Angela; Aresta, Michele; Pastore, Carlo; di Bitonto, Luigi; Angelini, Antonella; Quaranta, Eugenio
Text359845 2015 10.1039/c5ra03358f ISI Web of Science WOS 000351556800063 HMF Fructose Biomass Valorization Glucose Cerium Phosphate Conversion of fructose into 5 HMF a study on the behaviour of heterogeneous cerium based catalysts and their stability in aqueous media under mild conditions Dibenedetto, Angela; Aresta, Michele; Pastore, Carlo; di Bitonto, Luigi; Angelini, Antonella; Quaranta, Eugenio Univ Bari; CIRCC; CNR IRSA In this paper, we present the results of a study on 5 HMF production from fructose by means of heterogeneous catalysts in aqueous media. Mild conditions were used, setting the temperature between 393 K and 443 K. Cerium IV phosphates, different from other metal IV phosphates, such as titanium and zirconium, have been characterized only recently. Ce phosphates are quite complex structures as they show several arrangements. They undergo leaching of the phosphate group as phosphoric acid with consequent slow de activation of the catalysts. The leaching rate depends on the nature and on the temperature of the calcination of the original phosphates. This opened the question whether the conversion was driven by the heterogeneous catalysts or by the soluble phosphoric acid. A specific test has demonstrated that the solid catalysts are responsible for the conversion of fructose into 5 HMF, more than the liquid phase. We have also demonstrated that the leached phosphate is substituted by fructose on the solid catalyst. A best yield of 52% with selectivity of 93% in batch and 24% in a flow reactor at 443 K single pass with a selectivity also > 95% were obtained. 5 Published version Articolo in rivista RSC Publishing 2046 2069 RSC advances RSC advances RSC advances Royal Society of Chemistry advances carlo.pastore PASTORE CARLO TA.P07.001.005 Recupero di risorse da rifiuti e biomasse