From humins wastes to highly efficient ...
Document type :
Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès sans actes
Permalink :
Title :
From humins wastes to highly efficient Nb@graphite-like carbon catalysts: An exemplification of the circular economy concept
Author(s) :
El Fergani, Magdi [Auteur]
University of Bucharest [UniBuc]
Candu, Natalia [Auteur]
University of Bucharest [UniBuc]
Tudorache, Madalina [Auteur]
University of Bucharest [UniBuc]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Parvulescu, Vasile I. [Auteur]
University of Bucharest [UniBuc]
Coman, Simona M. [Auteur]
University of Bucharest [UniBuc]
University of Bucharest [UniBuc]
Candu, Natalia [Auteur]
University of Bucharest [UniBuc]
Tudorache, Madalina [Auteur]
University of Bucharest [UniBuc]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Parvulescu, Vasile I. [Auteur]
University of Bucharest [UniBuc]
Coman, Simona M. [Auteur]
University of Bucharest [UniBuc]
Conference title :
Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT9)
City :
Fukuoka
Country :
Japon
Start date of the conference :
2022-07-24
HAL domain(s) :
Chimie
English abstract : [en]
NbOx supported on humins were prepared via the impregnation-deposition of ammonium niobate(V) oxalate hydrate, in an aqueous solution of urea, followed by calcination at 4500C in a nitrogen flow. Characterization of the ...
Show more >NbOx supported on humins were prepared via the impregnation-deposition of ammonium niobate(V) oxalate hydrate, in an aqueous solution of urea, followed by calcination at 4500C in a nitrogen flow. Characterization of the resulted catalysts indicated bi-functional acid-base niobium species anchored onto a highly hydrophobic graphite-like carbon structure. The acid-base functionality was associated to the presence of -Nb-OH, -Nb=O and -NH2 or/and C=N functions of the carbon carrier surface. These catalysts were investigated in the one-pot conversion of glucose to 5-hydroxymethylfurfural (HMF) in a biphasic system consisting of a mixture of a 20wt% NaCl aqueous solution phase and an organic extracting phase (methyl-isobutyl-ketone (MIBK), 2-tert-butylphenol (TBP) or 2-sec-butylphenol (SBP)). The optimization conditions afforded the highest yield to HMF (96%) for the GHNb1.2 catalyst (1.2 is the loading of niobium in mmols, the base/acid sites ratio of 1.76, in biphasic TBP/water system, at 180C after 8h.Show less >
Show more >NbOx supported on humins were prepared via the impregnation-deposition of ammonium niobate(V) oxalate hydrate, in an aqueous solution of urea, followed by calcination at 4500C in a nitrogen flow. Characterization of the resulted catalysts indicated bi-functional acid-base niobium species anchored onto a highly hydrophobic graphite-like carbon structure. The acid-base functionality was associated to the presence of -Nb-OH, -Nb=O and -NH2 or/and C=N functions of the carbon carrier surface. These catalysts were investigated in the one-pot conversion of glucose to 5-hydroxymethylfurfural (HMF) in a biphasic system consisting of a mixture of a 20wt% NaCl aqueous solution phase and an organic extracting phase (methyl-isobutyl-ketone (MIBK), 2-tert-butylphenol (TBP) or 2-sec-butylphenol (SBP)). The optimization conditions afforded the highest yield to HMF (96%) for the GHNb1.2 catalyst (1.2 is the loading of niobium in mmols, the base/acid sites ratio of 1.76, in biphasic TBP/water system, at 180C after 8h.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Research team(s) :
Remédiation et matériaux catalytiques (REMCAT)
Submission date :
2023-07-04T12:15:16Z
2023-11-22T16:26:26Z
2024-01-31T07:22:52Z
2023-11-22T16:26:26Z
2024-01-31T07:22:52Z
Files
- Manuscript_Humins_PG.doc
- Version finale acceptée pour publication (postprint)
- Open access
- Access the document