Conversion of cellulose to HMF in ionic liquid catalyzed by bifunctional ionic liquids

Zhou, Lilong; Liang, Runjuan; Ma, Zhanwei; Wu, Tinghua; Wu, Ying

doi:10.1016/j.biortech.2012.11.015

Cited by 142 publications

(80 citation statements)

References 25 publications

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“…With this type of IL, it is possible to integrate pretreatment, fractionation, hydrolysis, and conversion in a one‐pot reaction, which is a key advantage over conventional technologies for biomass processing . Several acidic ILs have been used as integrated solvents and catalysts for biomass pretreatment to directly produce monosaccharides, furans, and organic acids as the main products. For instance, acidic ILs functionalized with SO 3 H groups greatly increase the reaction rate of cellulose hydrolysis to produce glucose .…”

Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

et al. 2015

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Lignocellulosic materials, such as forest, agriculture, and agroindustrial residues, are among the most important resources for biorefineries to provide fuels, chemicals, and materials in such a way to substitute for, at least in part, the role of petrochemistry in modern society. Most of these sustainable biorefinery products can be produced from plant polysaccharides (glucans, hemicelluloses, starch, and pectic materials) and lignin. In this scenario, cellulosic ethanol has been considered for decades as one of the most promising alternatives to mitigate fossil fuel dependence and carbon dioxide accumulation in the atmosphere. However, a pretreatment method is required to overcome the physical and chemical barriers that exist in the lignin–carbohydrate composite and to render most, if not all, of the plant cell wall components easily available for conversion into valuable products, including the fuel ethanol. Hence, pretreatment is a key step for an economically viable biorefinery. Successful pretreatment method must lead to partial or total separation of the lignocellulosic components, increasing the accessibility of holocellulose to enzymatic hydrolysis with the least inhibitory compounds being released for subsequent steps of enzymatic hydrolysis and fermentation. Each pretreatment technology has a different specificity against both carbohydrates and lignin and may or may not be efficient for different types of biomasses. Furthermore, it is also desirable to develop pretreatment methods with chemicals that are greener and effluent streams that have a lower impact on the environment. This paper provides an overview of the most important pretreatment methods available, including those that are based on the use of green solvents (supercritical fluids and ionic liquids).

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Section: Pretreatment Of Lignocellulosic Biomassmentioning

confidence: 99%

Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

et al. 2015

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“…Acidic ionic liquids have large potentials in replacing conventional acidic catalysts for they are flexible, recyclable, and could be used as dual solvents and catalysts (Cole et al, 2002). Applications of acidic ionic liquids as catalysts for cellulose conversion have been reported with 62% (Amarasekara & Owereh, 2009) and 99% (Liu, Xiao, Xia, & Ma, 2013) yields towards total reducing sugar (TRS) product; 37% (Tao, Song, Yang, & Chou, 2011), 53% (Zhou, Liang, Ma, Wu, & Wu, 2013), 66.5% (Shi et al, 2013), and 69.7% (Ding et al, 2012) yields towards HMF product, in the presence of metal chloride as co-catalyst or IL as solvent. Recently, we employed SO 3 H-functionalized acidic ionic liquids in the direct conversion of cellulose to LA under microwave irradiation, whereas 55% of LA has been obtained (Ren, Zhou, & Liu, 2013).…”

Section: Introductionmentioning

confidence: 98%

Selective and recyclable depolymerization of cellulose to levulinic acid catalyzed by acidic ionic liquid

Ren

Girisuta

Zhou

et al. 2015

Carbohydrate Polymers

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“…have been widely studied as renewable resources for catalytic conversion to produce HMF. Although the highly efficient conversion of monosaccharide‐to‐HMF has been reported by various groups using mild methods, the utilization of such carbohydrates would significantly impact the food supply. Accordingly the utilization of abundant inedible cellulose for the HMF production would be of more significance and value .…”

Section: Introductionmentioning

confidence: 99%

Combination of Brønsted and Lewis Polymeric Catalysts for Efficient Conversion of Cellulose into 5‐Hydroxymethylfurfural (HMF) in Ionic Liquids

et al. 2015

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Stable oil‐in‐water high internal phase emulsions (HIPEs) with an internal phase volume fraction of 85 % were stabilized using Tween 85. The prepared poly(HIPEs) were first investigated as adsorbents to treat water polluted with CrIII, and then the catalysts with Lewis acidic sites was synthesized. The catalysts with Brønsted acidic sites were obtained by ion‐exchanging. The as‐prepared HIPEs–CrIII (PEs–CrIII) and HIPEs–SO3H (PEs–SO3H) possess open‐cell structure, interconnecting pores, and strong acidity, they are utilized as highly efficient catalysts for the conversion of biomass to 5‐hydroxymethylfurfural (HMF). These results showed maximum production yields for cellulose, glucose, and fructose of 37.0 %, 58.0 %, and 80.8 %, respectively. PEs–CrIII and PEs–SO3H can be very easily recycled at least four times without significant loss of activity. Herein, a new method is presented to transform cellulose by using two catalysts in a one‐pot process for meeting the varying demands involved at different reaction stages.

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Conversion of cellulose to HMF in ionic liquid catalyzed by bifunctional ionic liquids

Cited by 142 publications

References 25 publications

Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries

Selective and recyclable depolymerization of cellulose to levulinic acid catalyzed by acidic ionic liquid

Combination of Brønsted and Lewis Polymeric Catalysts for Efficient Conversion of Cellulose into 5‐Hydroxymethylfurfural (HMF) in Ionic Liquids

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