Direct transformation of xylan-type hemicelluloses to furfural via SnCl4 catalysts in aqueous and biphasic systems

Wang, Wenju; Ren, Junli; Li, Huiling; Deng, Aojie; Sun, Run‐Cang

doi:10.1016/j.biortech.2015.02.068

Cited by 118 publications

(57 citation statements)

References 33 publications

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“…The F yields from various substrates were 75% (xylose), 64% (xylan), 55% (corn stover), 38% (pine wood), 56% (switch grass), and 64% (poplar wood). Wang et al (2015) obtained 78.1% F yield from xylan-type hemicelluloses with SnCl 4 as catalyst in a biphasic system made up of 2-methyl-THF and water.…”

Section: Optimization Of Furfural Production From Autohydrolysis Liqumentioning

confidence: 99%

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Furfural production from birch hemicelluloses by two-step processing: a potential technology for biorefineries

et al. 2016

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Birch samples were subjected to non-isothermal autohydrolysis to obtain a solution of hemicellulosic saccharides and a solid phase mainly made up of cellulose and lignin. Based on kinetic modeling, operational conditions were identified which give rise to soluble saccharides and furfural derived from xylan in a yield of 80.5%. The soluble mixture was supplemented with 1% sulfuric acid and heated (directly or in the presence of methyl isobutyl ketone, MIBK) for furfural production. MIBK is used as an extraction agent to limit furfural consumption by side reactions. Operating in single phase at 170°C, up to 44.8% of the potential substrates were converted into furfural. In experiments performed in biphasic media, the effects of MIBK were assessed by empirical modeling and about 75% of the potential substrates were converted under selected conditions.

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Section: Optimization Of Furfural Production From Autohydrolysis Liqumentioning

confidence: 99%

“…In particular, the utilization of biphasic media, in which an organic solvent plays an important role as an F extraction agent, shows good results (Weingarten et al 2010;Gürbüz et al 2012;Yang et al 2012;Rivas et al 2013;Wang et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Furfural production from birch hemicelluloses by two-step processing: a potential technology for biorefineries

et al. 2016

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“…Metal cations such as Sn 4+ , Cr 3+ , Al 3+ acting as Lewis acids were beneficial for the conversion of xylose to xylulose, and our group found that SnCl4 was the most effective catalyst for the furfural production, compared with other metal chlorides [9]. However, the chromium ion is toxic and these homogeneous catalysts are unable to recycle, thus a desirable heterogeneous catalyst containing Sn 4+ need to be designed.…”

Section: Introductionmentioning

confidence: 99%

SO42−/Sn-MMT Solid Acid Catalyst for Xylose and Xylan Conversion into Furfural in the Biphasic System

Lin

Wang

et al. 2017

Catalysts

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Abstract:A sulphated tin ion-exchanged montmorillonite (SO 4 2− /Sn-MMT) was successfully prepared by the ion exchange method of montmorillonite (MMT) with SnCl 4 , followed by the sulphation. This catalysis was applied as a solid acid catalyst for the heterogeneous catalytic transformations of xylose and xylan into furfural in the bio-based 2-methyltetrahydrofuran/H 2 O biphasic system. These prepared catalysts were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), temperature programmed desorption of ammonia (NH 3 -TPD), pyridine adsorbed Fourier transform infrared spectroscopy (Py-FTIR), element analysis (EA) and Brunauer-Emmett-Teller (BET) method. Their catalytic performance for xylose and xylan into furfural was also investigated. The reaction parameters such as the initial xylose and xylan concentration, the amounts of catalyst, the organic-to-aqueous phase volume ratio, the reaction temperature and time were studied to optimize the reaction conditions. Results displayed that SO 4 2− /Sn-MMT contained both Brønsted acid and Lewis acid sites, and SO 4 2− ions were contributive to the formation of stronger Brønsted acid sites, which could improve the reaction efficiency. Reaction parameters had significant influence on the furfural production. The substitution of water by the saturated NaCl solution in the aqueous phase also had an important effect on the xylose and xylan conversion. The highest furfural yields were achieved up to 79.64% from xylose and 77.35% from xylan under the optimized reaction conditions (160 • C, 120 min; 160 • C, 90 min). Moreover, the prepared catalyst was stable and was reused five times with a slight decrease (10.0%) of the furfural yield.

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“…Lately, studies focusing in the conversion of xylans to bioenergy, chemicals and biomaterials have received a lot of attention in the context of biorefineries. Among the products which can be obtained from pentoses, there is furfural, which is a promising alternative, since it is a versatile compound that can be used in the synthesis of several important chemicals, such as furan and furfuryl alcohol, and it is vastly used in several applications in refining oil, plastics production, pharmaceutical and agrochemical industries [35].…”

Section: Furfural Productionmentioning

confidence: 99%

“…Besides improving reaction system, it has been studied the use of catalysts which do no harm so much the environment as the mineral acids. One of the possible substitutes to mineral acids are metallic chlorides, which have shown improvement in furfural rate of formation, and it was proved that both chloride ions and metallic cations are responsible for furfural production [35] [43].…”

Section: Furfural Productionmentioning

confidence: 99%

Literature Review on Furfural Production from Lignocellulosic Biomass

Machado¹,

Leon²,

Santos³

et al. 2016

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The use of renewable sources for obtainment of chemicals, biofuels, materials and energy has become each time larger due to environmental, political and economical problems of non-renewable energies utilization. Among several products that can be obtained from lignocellulosic biomass, which is a renewable source, there is furfural, a chemical from which many other value added chemical products can be obtained. The main route for furfural production consists of an acid hydrolysis of hemicelluloses present in lignocellulosic biomass to obtain xylose, which goes through a dehydration reaction to produce furfural. Due to the presence of an aldehyde group and a conjugated system of double bounds, furfural can go through several reactions, allowing the production of a range of value added products. In this sense, this article performs a review about mechanisms of furfural production from lignocellulosic biomass, highlighting its chemical properties which enable its utilization in different industrial applications of economic interest.

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Direct transformation of xylan-type hemicelluloses to furfural via SnCl4 catalysts in aqueous and biphasic systems

Cited by 118 publications

References 33 publications

Furfural production from birch hemicelluloses by two-step processing: a potential technology for biorefineries

Furfural production from birch hemicelluloses by two-step processing: a potential technology for biorefineries

SO42−/Sn-MMT Solid Acid Catalyst for Xylose and Xylan Conversion into Furfural in the Biphasic System

Literature Review on Furfural Production from Lignocellulosic Biomass

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