Cargando…

Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts

The catalytic dehydration of fructose to 5-hydroxymethylfurfural (HMF) in water was performed in the presence of pristine Nb(2)O(5) and composites containing Nb and Ti, Ce or Zr oxides. In all experiments, fructose was converted to HMF using water as the solvent. The catalysts were characterized by...

Descripción completa

Detalles Bibliográficos
Autores principales: García-López, Elisa I., Pomilla, Francesca Rita, Megna, Bartolomeo, Testa, Maria Luisa, Liotta, Leonarda Francesca, Marcì, Giuseppe
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308375/
https://www.ncbi.nlm.nih.gov/pubmed/34361205
http://dx.doi.org/10.3390/nano11071821
_version_ 1783728265895084032
author García-López, Elisa I.
Pomilla, Francesca Rita
Megna, Bartolomeo
Testa, Maria Luisa
Liotta, Leonarda Francesca
Marcì, Giuseppe
author_facet García-López, Elisa I.
Pomilla, Francesca Rita
Megna, Bartolomeo
Testa, Maria Luisa
Liotta, Leonarda Francesca
Marcì, Giuseppe
author_sort García-López, Elisa I.
collection PubMed
description The catalytic dehydration of fructose to 5-hydroxymethylfurfural (HMF) in water was performed in the presence of pristine Nb(2)O(5) and composites containing Nb and Ti, Ce or Zr oxides. In all experiments, fructose was converted to HMF using water as the solvent. The catalysts were characterized by powder X-ray diffraction, scanning electron microscopy, N(2) physical adsorption, infrared and Raman spectroscopy and temperature-programmed desorption of NH(3). Experimental parameters such as fructose initial concentration, volume of the reacting suspension, operation temperature, reaction time and amount of catalyst were tuned in order to optimize the catalytic reaction process. The highest selectivity to HMF was ca. 80% in the presence of 0.5 g·L(−1) of bare Nb(2)O(5), Nb(2)O(5)-TiO(2) or Nb(2)O(5)-CeO(2) with a maximum fructose conversion of ca. 70%. However, the best compromise between high conversion and high selectivity was reached by using 1 g·L(−1) of pristine Nb(2)O(5). Indeed, the best result was obtained in the presence of Nb(2)O(5), with a fructose conversion of 76% and a selectivity to HMF of 75%, corresponding to the highest HMF yield (57%). This result was obtained at a temperature of 165° in an autoclave after three hours of reaction by using 6 mL of 1 M fructose suspension with a catalyst amount equal to 1 g·L(−1).
format Online
Article
Text
id pubmed-8308375
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-83083752021-07-25 Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts García-López, Elisa I. Pomilla, Francesca Rita Megna, Bartolomeo Testa, Maria Luisa Liotta, Leonarda Francesca Marcì, Giuseppe Nanomaterials (Basel) Article The catalytic dehydration of fructose to 5-hydroxymethylfurfural (HMF) in water was performed in the presence of pristine Nb(2)O(5) and composites containing Nb and Ti, Ce or Zr oxides. In all experiments, fructose was converted to HMF using water as the solvent. The catalysts were characterized by powder X-ray diffraction, scanning electron microscopy, N(2) physical adsorption, infrared and Raman spectroscopy and temperature-programmed desorption of NH(3). Experimental parameters such as fructose initial concentration, volume of the reacting suspension, operation temperature, reaction time and amount of catalyst were tuned in order to optimize the catalytic reaction process. The highest selectivity to HMF was ca. 80% in the presence of 0.5 g·L(−1) of bare Nb(2)O(5), Nb(2)O(5)-TiO(2) or Nb(2)O(5)-CeO(2) with a maximum fructose conversion of ca. 70%. However, the best compromise between high conversion and high selectivity was reached by using 1 g·L(−1) of pristine Nb(2)O(5). Indeed, the best result was obtained in the presence of Nb(2)O(5), with a fructose conversion of 76% and a selectivity to HMF of 75%, corresponding to the highest HMF yield (57%). This result was obtained at a temperature of 165° in an autoclave after three hours of reaction by using 6 mL of 1 M fructose suspension with a catalyst amount equal to 1 g·L(−1). MDPI 2021-07-13 /pmc/articles/PMC8308375/ /pubmed/34361205 http://dx.doi.org/10.3390/nano11071821 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
García-López, Elisa I.
Pomilla, Francesca Rita
Megna, Bartolomeo
Testa, Maria Luisa
Liotta, Leonarda Francesca
Marcì, Giuseppe
Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts
title Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts
title_full Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts
title_fullStr Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts
title_full_unstemmed Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts
title_short Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural in Aqueous Medium over Nb(2)O(5)-Based Catalysts
title_sort catalytic dehydration of fructose to 5-hydroxymethylfurfural in aqueous medium over nb(2)o(5)-based catalysts
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308375/
https://www.ncbi.nlm.nih.gov/pubmed/34361205
http://dx.doi.org/10.3390/nano11071821
work_keys_str_mv AT garcialopezelisai catalyticdehydrationoffructoseto5hydroxymethylfurfuralinaqueousmediumovernb2o5basedcatalysts
AT pomillafrancescarita catalyticdehydrationoffructoseto5hydroxymethylfurfuralinaqueousmediumovernb2o5basedcatalysts
AT megnabartolomeo catalyticdehydrationoffructoseto5hydroxymethylfurfuralinaqueousmediumovernb2o5basedcatalysts
AT testamarialuisa catalyticdehydrationoffructoseto5hydroxymethylfurfuralinaqueousmediumovernb2o5basedcatalysts
AT liottaleonardafrancesca catalyticdehydrationoffructoseto5hydroxymethylfurfuralinaqueousmediumovernb2o5basedcatalysts
AT marcigiuseppe catalyticdehydrationoffructoseto5hydroxymethylfurfuralinaqueousmediumovernb2o5basedcatalysts