Selective saccharides dehydration to 5-hydroxymethyl-2-furaldehyde by heterogeneous niobium catalysts

Carlini, Carlo; Giuttari, Mario; Galletti, Anna Maria Raspolli; Sbrana, Glauco; Armaroli, Tiziana; Busca, Guido

doi:10.1016/s0926-860x(99)00064-2

Cited by 187 publications

(105 citation statements)

References 27 publications

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“…As such, it is an attractive biopolymer for the synthesis of HMF. A number of studies have been reported on the synthesis of HMF from inulin in water [40][41][42][43][44]. The highest HMF yields reported so far in a monophasic system are from Wu et al [40], who reported a 53% HMF yield when performing the reaction in water in the presence of CO2 (11 MPa) at 200 °C.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Modeling Studies on the Conversion of Inulin to 5-Hydroxymethylfurfural Using Metal Salts in Water

2015

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Inulin, a plant polysaccharide consisting of mainly D-fructose units, is considered an interesting feed for 5-hydroxymethylfurfural (HMF), a top 12 bio-based chemical. We here report an exploratory experimental study on the use of a wide range of homogeneous metal salts as catalysts for the conversion of inulin to HMF in water. Best results were obtained using CuCl2. Activity-pH relations indicate that the catalyst activity of CuCl2 is likely related to Lewis acidity and not to Brönsted acidity. The effects of process conditions on HMF yield for CuCl2 were systematically investigated and quantified using a central composite design (160-180 °C, an inulin loading between 0.05 and 0.15 g/mL, CuCl2 concentration in range of 0.005-0.015 M, and a reaction time between 10 and 120 min). The highest experimental HMF yield in the process window was 30.3 wt. % (39 mol %, 180 °C, 0.05 g/mL inulin, 0.005 M CuCl2 and a reaction time of 10 min). The HMF yields were modelled using non-linear, multi variable regression and good agreement between experimental data and model were obtained.

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Section: Introductionmentioning

confidence: 99%

Experimental and Modeling Studies on the Conversion of Inulin to 5-Hydroxymethylfurfural Using Metal Salts in Water

2015

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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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“…The dehydration of fructose to 5-hydroxymethylfurfural was studied by Carlini et al using niobium, titanium, zirconium and vanadyl phosphates as catalysts, with one of the best results observed for cubic zirconium pyrophosphate that gave 99.8% furfural selectivity at ca. 44% fructose conversion, in aqueous solution at 100°C [5][6][7]. Recently, some of us reported that sulphonic acid-functionalised ordered mesoporous silicas are also effective catalysts for the dehydration of D-xylose to furfural [8].…”

Section: Introductionmentioning

confidence: 99%

Liquid-phase Dehydration of d-xylose over Microporous and Mesoporous Niobium Silicates

et al. 2006

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Microporous AM-11 crystalline niobium silicates were studied as solid acid catalysts for the dehydration of xylose in a watertoluene solvent mixture at 140-180°C. After 6 h at 160°C, xylose conversions of up to 90% and furfural yields of up to 50% were achieved, and the catalysts could be reused without loss of activity or selectivity. The calcined AM-11 catalysts gave higher furfural yields than HY zeolite and mordenite, under identical reaction conditions. Ordered mesoporous MCM-41-type niobium silicates with Si/Nb molar ratios of either 25 or 50 were also found to be recyclable catalysts for xylose dehydration, and gave furfural yields consistently in the range of 34-39% (after 6 h reaction at 160°C).

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Selective saccharides dehydration to 5-hydroxymethyl-2-furaldehyde by heterogeneous niobium catalysts

Cited by 187 publications

References 27 publications

Experimental and Modeling Studies on the Conversion of Inulin to 5-Hydroxymethylfurfural Using Metal Salts in Water

Experimental and Modeling Studies on the Conversion of Inulin to 5-Hydroxymethylfurfural Using Metal Salts in Water

Conversion of biomass into 5-hydroxymethylfurfural using solid acid catalyst

Liquid-phase Dehydration of d-xylose over Microporous and Mesoporous Niobium Silicates

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