Solubility of Carbohydrates in Ionic Liquids

Zakrzewska, Małgorzata E.; Bogel‐Łukasik, Ewa; Bogel‐Łukasik, Rafał

doi:10.1021/ef901215m

Cited by 481 publications

(334 citation statements)

References 63 publications

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“…27, 28 The application of ionic liquids in carbohydrates (lignocellulosic biomass) chemistry is relatively new and further studies combining these two fields are presented by Zakrzewska et al 29 Additionally, Qi et al also reported promising results when they studied the production of HMF from glucose and fructose catalyzed by TiO 2 and ZrO 2 under microwave irradiation.…”

Section: -23mentioning

confidence: 99%

Kinetics of furfural production by dehydration of xylose in a biphasic reactor with microwave heating

et al. 2010

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In this paper we report a kinetic model for the dehydration of xylose to furfural in a biphasic batch reactor with microwave heating. There are four key steps in our kinetic model: (1) xylose dehydration to form furfural; (2) furfural reaction to form degradation products; (3) furfural reaction with xylose to form degradation products, and (4) mass transfer of furfural from the aqueous phase into the organic phase (methyl isobutyl ketone -MIBK). This kinetic model was used to fit experimental data collected in this study. The apparent activation energy for xylose dehydration is higher than the apparent activation energy for the degradation reactions. The biphasic system does not alter the fundamental kinetics in the aqueous phase. The organic layer, which serves as "storage" for the extracted furfural, is crucial to maximize product yield. Microwave heating does not change the kinetics compared to heating by conventional means. We use our model to describe the optimal reaction conditions for furfural production. These conditions occur in a biphasic regime at higher temperatures (i.e. 170• C) and short reaction times.We estimate that at these conditions furfural yields in a biphasic system can reach 85%. At these same conditions in a monophase system furfural yields are only 30%.

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Section: -23mentioning

confidence: 99%

Kinetics of furfural production by dehydration of xylose in a biphasic reactor with microwave heating

et al. 2010

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“…In all these treatments, the substantial degradation of lignin is accompanied by considerable reduction in fermentable sugar content of the feedstock, resulting in a loss of 20-35% of the mass of lignocellulose (Galbe and Zacchi 2007;Lee et al 2009). In contrast, recent reports give ample evidence that pretreating biomass with ionic liquids can disrupt the interactions between plant cell wall polymers, resulting in significant improvements in enzymatic hydrolysis kinetics while preventing the loss of fermentable sugars and facilitating the fractionation of biomass (Cheng et al 2011;da Costa Lopes et al 2013;Li et al 2010;Li et al 2009;Mora-Pale et al 2011;Singh et al 2009;Zakrzewska et al 2010;Zavrel et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Ionic liquid-tolerant microorganisms and microbial communities for lignocellulose conversion to bioproducts

Simmons

Singer

et al. 2016

Appl Microbiol Biotechnol

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Chemical and physical pretreatment of biomass is a critical step in the conversion of lignocellulose to biofuels and bioproducts. Ionic liquid (IL) pretreatment has attracted significant attention due to the unique ability of certain ILs to solubilize some or all components of the plant cell wall. However, these ILs not only inhibit enzyme activities, but also the growth and productivity of microorganisms used in downstream hydrolysis and fermentation processes.While pretreated biomass can be washed to remove residual IL and reduce inhibition, extensive washing is costly and not feasible in large-scale processes. IL tolerant microorganisms and microbial communities have been discovered from environmental samples and studies begun to elucidate mechanisms of IL tolerance. The discovery of IL tolerance in environmental microbial communities and individual microbes has lead to the proposal of molecular mechanisms of resistance. In this article, we review recent progress on discovering IL tolerant microorganisms, identifying metabolic pathways and mechanisms of tolerance, and engineering microorganisms for IL tolerance. Research in these areas will yield new approaches to overcome inhibition in lignocellulosic biomass bioconversion processes and increase opportunities for the use of ILs in biomass pretreatment.

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“…[9][10][11][12][13][14] Because of the high solvating ability for biomaterials, ILs have been extensively explored for the deconstruction of biomass, particularly lignocellulosic and cellulosic materials. [15][16][17][18][19][20][21] ILs as cellulose dissolving solvents have been critically reviewed in Tom Welton's research group very recently. 22 Apart from cellulosic materials, the dissolution/regeneration of chitin/CH or AG has also been carried out in ILs, and useful materials have been prepared from these polysaccharides [23][24][25][26][27][28][29][30][31] (Note: there are many other biomaterials which have been treated with ILs but not referred to here as the present study intends to focus on AG and CH).…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of agarose–chitosan hybrid materials and nanocomposite ionogels using an ionic liquid via dissolution, regeneration and sol–gel transition

2014

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We report simultaneous dissolution of agarose (AG) and chitosan (CH) in varying proportions in an ionic liquid (IL), 1-butyl-3-methylimidazolium chloride [C 4 mim] [Cl]. Composite materials were constructed from AG-CH-IL solutions using the antisolvent methanol, and IL was recovered from the solutions. Composite materials could be uniformly decorated with silver oxide (Ag 2 O) nanoparticles (Ag NPs) to form nanocomposites in a single step by in situ synthesis of Ag NPs in AG-CH-IL sols, wherein the biopolymer moiety acted as both reducing and stabilizing agent. Cooling of Ag NPs-AG-CH-IL sols to room temperature resulted in high conductivity and high mechanical strength nanocomposite ionogels. The structure, stability and physiochemical properties of composite materials and nanocomposites were characterized by several analytical techniques, such as Fourier transform infrared (FTIR), CD spectroscopy, differential scanning colorimetric (DSC), thermogravimetric analysis (TGA), gel permeation chromatography (GPC), and scanning electron micrography (SEM). The result shows that composite materials have good thermal and conformational stability, compatibility and strong hydrogen bonding interactions between AG-CH complexes. Decoration of Ag NPs in composites and ionogels was confirmed by UV-Vis spectroscopy, SEM, TEM, EDAX and XRD. The mechanical and conducting properties of composite ionogels have been characterized by rheology and current-voltage measurements. Since Ag NPs show good antimicrobial activity, Ag NPs -AG-CH composite materials have the potential to be used in biotechnology and biomedical applications whereas nanocomposite ionogels will be suitable as precursors for applications such as quasi-solid dye sensitized solar cells, actuators, sensors or electrochromic displays.

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Solubility of Carbohydrates in Ionic Liquids

Cited by 481 publications

References 63 publications

Kinetics of furfural production by dehydration of xylose in a biphasic reactor with microwave heating

Kinetics of furfural production by dehydration of xylose in a biphasic reactor with microwave heating

Ionic liquid-tolerant microorganisms and microbial communities for lignocellulose conversion to bioproducts

Facile preparation of agarose–chitosan hybrid materials and nanocomposite ionogels using an ionic liquid via dissolution, regeneration and sol–gel transition

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