Niobic acid and niobium phosphate as highly acidic viable catalysts in aqueous medium: Fructose dehydration reaction

Carniti, P.; Gervasini, Antonella; Biella, S.; Auroux, A.

doi:10.1016/j.cattod.2006.07.024

Cited by 200 publications

(152 citation statements)

References 24 publications

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“…The selective dehydration of fructose to HMF is an acid-catalyzed reaction. Brønsted acid sites and, in particular, phosphate groups are known to be active catalysts for this reaction [34][35][36][37]. Actually, correlating the final conversion after 12 h and the P concentration on the surface, as determined by XPS, a clear correlation between activity and amount of P groups (Figure 7) appears.…”

Section: Discussionmentioning

confidence: 88%

“…Indeed, the co-presence of HNO 3 results in the introduction of O-functionalities on the surface, acting as preferential anchoring sites for phosphate groups [31]. As known from the literature, P-containing materials are effective catalysts in the selective dehydration of fructose to 5-hydroxymethylfurfural (HMF) in water [34][35][36][37][38]. Indeed, grafting P groups on the surface allowed to tune the surface acidity and resulted in more selective catalysts compared to other solid acid catalysts [37].…”

Section: Introductionmentioning

confidence: 95%

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Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Campisi

Trujillo

Motta

et al. 2018

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Phosphorylated carbons have been reported to be effective catalysts in dehydration reactions for biomass valorization. The amount and the nature of P groups are a key parameter affecting the catalytic performances of functionalized materials. Herein, we investigate the role of structural and surface properties of carbon-based materials, specifically carbon nanofibers, in determining the amount of P-functionalities. In order to incorporate P groups on carbon surfaces, various carbon nanofibers (CNFs) with different graphitization degrees have been functionalized through treatment with a H 3 PO 4 -HNO 3 mixture at 150 • C. The pristine materials, as well as the functionalization protocol, were properly selected to achieve an effective functionalization without drastically altering the morphology of the samples. Surface and structural properties of the synthesized functionalized materials have been investigated by means of transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The catalytic behavior of phosphorylated carbon nanofibers has been evaluated in the selective dehydration of fructose to hydroxymethylfurfural (HMF) to elucidate structure-activity relationships.

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Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 95%

Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Campisi

Trujillo

Motta

et al. 2018

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“…The low selectivity of glucose conversion without the addition of an extracting solvent may be explained by formation of intermediate products or adsorption of HMF over the catalyst (Carniti et al 2006). Ideally, separation of HMF from single organic solvent and THF-NaCl system would be less energy intensive.…”

Section: Effect Of Volume Ratio Of Thf To H2omentioning

confidence: 99%

Catalysis of Glucose to 5-Hydroxymethylfurfural using Sn-Beta Zeolites and a Brønsted Acid in Biphasic Systems

Yang¹,

Wang²,

Lyu³

et al. 2015

BioResources

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Selective and efficient dehydration of glucose to 5-hydroxymethylfurfural (HMF) has been a widely explored concept recently, especially from the perspective of employing environmentally benign heterogeneous catalysts. However, there has been a relative paucity of data regarding the application of Sn-Beta zeolites, a category of catalysts that are very innocuous, inexpensive, and effective, toward evaluating bio-based conversions. Sn-Beta was shown to possess good Lewis acidity for catalyzing glucose isomerization to fructose in aqueous media at low pH and accelerating dehydration of glucose to HMF in a biphasic system with high yields. Sn-Beta zeolite with NH4F as the mineralizing agent (Sn-Beta-F) was a more effective catalyst for the selective dehydration of glucose to HMF. An optimal HMF yield of 53.0% was obtained over Sn-Beta-F zeolite in an acidic environment (pH 1) after 70 min at 190 °C. The reaction system was also effective for conversion of cellulose to HMF with a yield of 32.2% preliminarily.

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“…Niobic acid treated with 1 M phosphoric acid and calcinated at 573 K (abbreviated as NA-p) has larger surface area and stronger acidic property Kurosaki et al, 1987). Thus in recent years, some attention was paid for niobium compounds as catalysts to produce HMF from varied reactants including monosaccharides and polysaccharides in water, but the HMF yield was not very satisfactory (14-74%) (Carniti et al, 2006;Carlini et al, 1999;Armaroli et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Conversion of biomass into 5-hydroxymethylfurfural using solid acid catalyst

Yang

Liu

et al. 2011

Bioresource Technology

216

111

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Niobic acid and niobium phosphate as highly acidic viable catalysts in aqueous medium: Fructose dehydration reaction

Cited by 200 publications

References 24 publications

Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Catalysis of Glucose to 5-Hydroxymethylfurfural using Sn-Beta Zeolites and a Brønsted Acid in Biphasic Systems

Conversion of biomass into 5-hydroxymethylfurfural using solid acid catalyst

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