Sustainable Catalytic Strategies for C5-Sugars and Biomass Hemicellulose Conversion Towards Furfural Production

Lopes, André M. da Costa; Morais, Ana Rita C.; Bogel‐Łukasik, Rafał

doi:10.1007/978-981-10-4172-3_2

Cited by 7 publications

(8 citation statements)

References 108 publications

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“…was tested in this study, and the optimum furfural yield was 62%. So far some researchers have already employed this kind of ionic liquid in the production from C5 carbohydrates, and similar conversion results were achieved like in this work 56,57. However, most of the previous work used ionic liquid as both solvent and catalyst, leading to potential risks…”

supporting

confidence: 79%

“…salts to form ionic liquid catalysts 54,55. So far some researchers have already employed this kind of ionic liquid in the production from C5 carbohydrates, and similar conversion results were achieved like in this work 56. So far some researchers have already employed this kind of ionic liquid in the production from C5 carbohydrates, and similar conversion results were achieved like in this work 56.…”

supporting

confidence: 63%

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Dehydration of xylose to furfural in butanone catalyzed by Brønsted‐Lewis acidic ionic liquids

Zhao

et al. 2019

Energy Science & Engineering

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In this study, the most abundant C5 carbohydrate unit in biomass, namely xylose, was chosen as the feedstock, and its hydrothermal conversion for furfural production was carried out in a green and renewable solvent system composed of water and butanone, in order to study the role of FeCl3 and [bmim]Cl of ionic liquid catalyst in the conversion process of xylose. A key intermediate named xylulose from Lewis acid‐catalyzed xylose isomerization was quantified. It was concluded that appropriate content of FeCl3 and [bmim]Cl favored the isomerization‐dehydration reaction path along which xylose was converted into furfural, while excessive amount of either component would result in side reactions leading to furfural consumption at long reaction times. By comparison between ionic liquid catalysts that had different active metal sites, xylose conversion and furfural yields were found to increase when the Lewis acidity of the metal ions became stronger. Moreover, chlorometallate anions with better catalytic performance than the original neutral salts were formed during catalyst preparation, and in this way, the xylose conversion and furfural formation were further promoted. Finally, the optimized ionic liquid catalyst produced a highest furfural yield of 75% and xylose conversion of 99% at 140°C.

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supporting

confidence: 79%

supporting

confidence: 63%

Dehydration of xylose to furfural in butanone catalyzed by Brønsted‐Lewis acidic ionic liquids

Zhao

et al. 2019

Energy Science & Engineering

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“…Hydronium ion activity is crucial for the hemicellulose hydrolysis step of lignocellulosic biomass and the promotion of xylose release. [28][29][30][31] The addition of NaCl as a secondary catalyst for pure C5 sugar conversion can lead to a significant increase in the furfural yield. 2,[13][14][15][16] The Cl ions improve the transition states of xylose during the dehydration step, thus promoting furfural formation.…”

Section: Furfural Production From Water Hyacinthmentioning

confidence: 99%

Experimental studies of furfural production from water hyacinth (Eichhornia Crassipes)

Poomsawat

Tsalidis

Tsekos

et al. 2019

Energy Science & Engineering

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Furfural is a very promising product of lignocellulosic biomass‐based biorefineries and has the potential to become a useful resource for further conversion and utilization. Aquatic plants show an enormous potential as feedstock since they do not compete for land use, and they require minimal water consumption in a biorefinery concept due to their very high water content. This work is focused on experimental studies of furfural production from water hyacinth (Eichhornia crassipes) by means of aqueous, acid‐catalyzed dehydration. The temperature range of the process, and the acid and seawater presence were chosen based on the previous relevant studies. The aim of the study was to determine whether water hyacinth is suitable for furfural production. The experiments were performed between 160°C and 200°C with a water hyacinth concentration of 2 wt%. The results suggest that the effects of acid catalyst presence on biomass dehydration are similar to the case of pure pentose dehydration. Furthermore, the addition of seawater did not have a positive catalytic effect in terms of the furfural yield. The maximum yield was 53.2 mol% based on the C5 sugar content in the original biomass. The furfural yield of 7.9 wt% of water hyacinth input was comparable to the yield of feedstocks such as corn cob, bagasse, and oat's residue and higher than the cases of rice straw or hulls. Thanks to the comparatively high pentose potential, water hyacinth shows promising results as a candidate feedstock for furfural production. A certain variability of pentosan should be taken into account, as the chemical composition of the plant depends on the source and harvesting seasons.

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“…Furfural is prepared by acid hydrolysis of pentoses that are produced during the process of depolymerization of hemicellulose [1][2][3], but the exact mechanism of its formation is not fully understood. In the literature, several alternative synthetic pathways can be found [3][4][5][6][7][8]. According to the most cited mechanism, the 1,2-ethanediol is formed from pentoses and is further converted to furfural in the presence of protons derived from an acidic catalyst [3].…”

Section: Introductionmentioning

confidence: 99%

“…According to the most cited mechanism, the 1,2-ethanediol is formed from pentoses and is further converted to furfural in the presence of protons derived from an acidic catalyst [3]. In other works, furfural is formed in an acidic medium through an acyclic dehydration of pentoses [4][5][6][7][8]. Nimlos et al [7] attempted to determine the energy levels of transition states for the specified mechanisms through quantum modeling.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Pd-Au/SiO2 Catalysts for Reduction of Furfural in Water

et al. 2020

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Catalytic systems based on bimetallic Pd-Au particles deposited on SiO2 were prepared by ultrasonically assisted water impregnation and used in the hydrogenation of furfural obtained by the acidic hydrolysis of waste biomass (brewery’s spent grain) in aqueous phase. Pd-Au/SiO2 catalysts containing 50 g of Pd and 2–100 g of Au per 1 kg of catalyst were characterized by high activity in the studied process and, depending on the Pd/Au ratio, selectivity to 2-methyloxolan-2-ol. The modification of 5%Pd/SiO2 by Au leads to the formation of dispersed Au-Pd solid solution phases, which was confirmed by XRD, XPS, ToF-SIMS, SEM-EDS, and H2-TPR techniques. The effect of dilution of surface palladium by gold atoms is probably crucial for modification of the reaction mechanism and formation of 2-methyloxolan-2-ol as the main product.

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Sustainable Catalytic Strategies for C5-Sugars and Biomass Hemicellulose Conversion Towards Furfural Production

Cited by 7 publications

References 108 publications

Dehydration of xylose to furfural in butanone catalyzed by Brønsted‐Lewis acidic ionic liquids

Dehydration of xylose to furfural in butanone catalyzed by Brønsted‐Lewis acidic ionic liquids

Experimental studies of furfural production from water hyacinth (Eichhornia Crassipes)

Bimetallic Pd-Au/SiO2 Catalysts for Reduction of Furfural in Water

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