Furfural production from Eucalyptus wood using an Acidic Ionic Liquid

Peleteiro, Susana; Santos, Valentín; Garrote, Gil; Parajó, Juan Carlos

doi:10.1016/j.carbpol.2016.03.049

Cited by 69 publications

(32 citation statements)

References 23 publications

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“…[bmim]HSO 4 has been used to produce furfural from C5 saccharides [23,24], evidencing that the acidic character of [bmim]HSO 4 enabled a double role as a catalyst and as a solvent, a behavior potentially useful for achieving the delignification of lignocellulosic materials. In comparison, [TEA]HSO 4 is a low cost ionic liquid that shows comparative advantages respect to other ILs in terms of dissolution ability and thermal stability [25].…”

Section: Ionic Liquid (Il) Delignification: Lignin Removal and Recoverymentioning

confidence: 99%

Characterization of Eucalyptus nitens Lignins Obtained by Biorefinery Methods Based on Ionic Liquids

et al. 2020

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Eucalyptus nitens wood samples were subjected to consecutive stages of hydrothermal processing for hemicellulose solubilization and delignification with an ionic liquid, i.e., either 1-butyl-3-methylimidazolium hydrogen sulfate or triethylammonium hydrogen sulfate. Delignification experiments were carried out a 170 °C for 10–50 min. The solid phases from treatments, i.e., cellulose-enriched solids, were recovered by centrifugation, and lignin was separated from the ionic liquid by water precipitation. The best delignification conditions were identified on the basis of the results determined for delignification percentage, lignin recovery yield, and cellulose recovery in solid phase. The lignins obtained under selected conditions were characterized in deep by 31P-NMR, 13C-NMR, HSQC, and gel permeation chromatography. The major structural features of the lignins were discussed in comparison with the results determined for a model Ionosolv lignin.

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Section: Ionic Liquid (Il) Delignification: Lignin Removal and Recoverymentioning

confidence: 99%

Characterization of Eucalyptus nitens Lignins Obtained by Biorefinery Methods Based on Ionic Liquids

et al. 2020

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“…Liquid samples from the diverse reaction media were analyzed by HPAEC-PAD using an ICS3000 instrument (Dionex, Sunnyvale, CA, USA) equipped with a CarboPac PA-1 and a CarboPac PA guard column [28].…”

Section: Additional Characterization Of the Reaction Productsmentioning

confidence: 99%

Autocatalytic Fractionation of Wood Hemicelluloses: Modeling of Multistage Operation

2020

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Eucalyptus globulus wood samples were treated with hot, compressed water (autohydrolysis) in consecutive stages under non-isothermal conditions in order to convert the hemicellulose fraction into soluble compounds through reactions catalyzed by in situ generated acids. The first stage was a conventional autohydrolysis, and liquid phase obtained under conditions leading to an optimal recovery of soluble saccharides was employed in a new reaction (second crossflow stage) using a fresh wood lot, in order to increase the concentrations of soluble saccharides. In the third crossflow stage, the best liquid phase from the second stage was employed to solubilize the hemicelluloses from a fresh wood lot. The concentration profiles determined for the soluble saccharides, acids, and furans present in the liquid phases from the diverse crossflow stages were employed for kinetic modeling, based on pseudohomogeneous reactions and Arrhenius-type dependence of the kinetic coefficients on temperature. Additional characterization of the reaction products by High Pressure Size Exclusion Chromatography, High Performance Anion Exchange Chromatography with Pulsed Amperometric Detection, and Matrix Assisted Laser Desorption/Ionization Time of Flight Mass Spectrometry provided further insight on the properties of the soluble saccharides present in the various reaction media.

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“…One possible reason was that furfural underwent condensation reactions with xylose or xylulose to form byproducts like humins. 33,34 The furfural yield ranking catalyzed by the 4 different ionic liquids at 90 min from high to low was as follows: IL2 > IL3>IL4 > IL1. Sun [36][37][38] Therefore, appropriate χ(FeCl 3 ) should be chosen to achieve fast formation of furfural and inhibited occurrence of side reactions.…”

Section: Effects Of Catalyst Composition On Xylose Conversion and Fmentioning

confidence: 99%

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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Furfural production from Eucalyptus wood using an Acidic Ionic Liquid

Cited by 69 publications

References 23 publications

Characterization of Eucalyptus nitens Lignins Obtained by Biorefinery Methods Based on Ionic Liquids

Characterization of Eucalyptus nitens Lignins Obtained by Biorefinery Methods Based on Ionic Liquids

Autocatalytic Fractionation of Wood Hemicelluloses: Modeling of Multistage Operation

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

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