Saccharification of Natural Lignocellulose Biomass and Polysaccharides by Highly Negatively Charged Heteropolyacids in Concentrated Aqueous Solution

Ogasawara, Yasushi; Itagaki, Shintaro; Yamaguchi, Kazuya; Mizuno, Noritaka

doi:10.1002/cssc.201100025

Cited by 124 publications

(70 citation statements)

References 47 publications

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“…29 workers also utilised heteropolyacids for this reaction, and 54% yield of sorbitol was obtained at a low temperature (333 K) and hydrogen pressure (0.7 MPa). 34 Heteropolyacids are recoverable by recrystallisation or extraction. 35 Moreover, Sels et al reported that highly-diluted HCl (0.0177 wt%, pH=2.3) accelerates the 60 hydrolysis step, and 60% yield of sugar alcohols and 33% of sorbitan are obtained.…”

Section: Optimisation Of the Catalytic Systemmentioning

confidence: 99%

Conversion of lignocellulose into renewable chemicals by heterogeneous catalysis

Kobayashi

Ohta

Fukuoka

2012

Catal. Sci. Technol.

186

121

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Conversion of lignocellulose into renewable chemicals and fuels has received great attention for building up the sustainable societies. However, the utilisation of lignocellulose in the chemical industry has almost been limited for paper manufacturing because of the complicated chemical structure and persistent property of lignocellulose. Heterogeneous catalysis has the potential to selectively convert lignocellulosic biomasses into various useful chemicals, and this methodology has rapidly progressed in the last several 10 years. In this perspective article, we outline our recent approaches on the heterogeneous catalysis for this challenging subject with related literatures. Lignocellulose as a renewable resourceConversion of biomass to renewable fuels and chemicals has attracted significant attention as a key technology for the 15 sustainable societies.1 Lignocellulose is the most abundant biomass resource, produced together with sugars and starch from carbon dioxide and water via the photosynthesis using sunlight and successive metabolism in plants. Lignocellulose is not digestible for human beings, which is an advantage over sugars 20 and starch since the use of edible carbohydrates for the synthesis of bioethanol fuel has competed with the food production, giving us a consensus that we should use non-food biomass as a feedstock to fuels and chemicals. Therefore, lignocellulose is one of the most attractive biomass resources in nature. 25Lignocellulose in woods consists of cellulose (40-50%), hemicellulose (20-40%) and lignin (20-30%).2 Cellulose is a water-insoluble polymer composed of glucose linked by -1,4-glycosidic bonds ( Fig. 1(a)) and forms robust crystal structures with inter-and intra-molecular hydrogen bonds, possessing high 30 chemical stability. 3 Hemicellulose is also a polysaccharide, but

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Section: Optimisation Of the Catalytic Systemmentioning

confidence: 99%

Conversion of lignocellulose into renewable chemicals by heterogeneous catalysis

Kobayashi

Ohta

Fukuoka

2012

Catal. Sci. Technol.

186

121

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“…Natural biomass contains a mixture of sugars like arabinose, galactose, xylose, and many other mono-and disaccharides. 48,49 For example, rhamnose is commonly bound to other sugars in nature, 50 therefore it is necessary to develop a method for the conversion of rhamnose to MF in the presence of other sugars, therefore conversion of a mixture of sugars was also carried out and it was observed that this method is applicable for the formation of different furans in a single pot.…”

mentioning

confidence: 99%

One-Pot Synthesis of Furans from Various Saccharides Using a Combination of Solid Acid and Base Catalysts

Tuteja

Nishimura

Ebitani

2012

Bulletin of the Chemical Society of Japan

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One-pot synthesis of furans from various saccharides such as arabinose, rhamnose, and lactose were performed over solid acid and base catalysts. The combination of Amberlyst-15 and hydrotalcite catalysts showed successful activity for corresponding furans formation such as 2-furaldehyde (furfural), 5-hydroxymethyl-2-furaldehyde (HMF), and 5-methyl-2-furaldehyde (MF) via one-pot synthesis including isomerization and dehydration reactions. Moreover, the acidbase pair catalysts were also found to display excellent activity for the transformation from mixed-sources of sugars to furans. It was indicated that the isomerization of saccharides and successive dehydration in the one-pot synthesis of furans will be a great approach in a biorefinery.Biorefineries have gained much attention due to the potential to serve as a source of carbon-based fuels and chemicals in a carbon-neutral fashion, 13 the CO 2 released during energy conversion is consumed during subsequent biomass regrowth. Lignocellulosic biomass encompassing municipal and animal wastes, forestry residues, and others is a special interest resource on account of being the most abundant, inedible, and inexpensive biomass. The challenge for effective utilization is to develop cost-effective processes for transformation of huge built carbohydrates into value-added chemical compounds. Furan derivatives such as 2-furaldehyde (furfural), 5-hydroxymethyl-2-furaldehyde (HMF), and 5-methyl-2-furaldehyde (MF) have the potential to be substitutes of building blocks derived from petrochemicals in the production of fine chemicals, pharmaceuticals, and polymers. 48 For instance, HMF can be converted to 2,5-diformylfuran, 2,5-furandicarboxylic acid, 2,5-dimethylfuran, and levulinic acid. 4,913 MF is a useful intermediate for the production of agricultural chemicals (pesticides) and fragrances, and is a common flavoring component in the food industry and is considered a potential antitumor agent.1417 Industrial solvents like 1,5-pentanediol, 1,4-butanediol, and building blocks such as succinic acid, maleic acid are the main products derived from furfural. 1821Recently, Lam et al. 22 and Binder et al. 23 have reported the synthesis of furfural from xylose in good yield using Nafion 117 and chromium halide with ionic liquid, respectively. Dehydration of xylose to furfural is investigated using various solid acid catalysts like sulfonic acid appended porous silicas, 24 metal oxide nanosheets, 25 ion-exchange resins, 26 and zeolites. 27Besides, the inorganic acids with subcritical water at 403 K, 28 organic acids such as oxalic, levulinic, and p-toluenesulfonic acids 2932 were also examined for dehydration of D-fructose. From the view point of reaction system activation, dehydration in watermethyl isobutyl ketone or watertoluene biphasic systems were also investigated with H-mordenite and Hfaujasite by Moreau et al. 33 Although the yield obtained is significant in the above-mentioned processes most of them involve use of high temperature, severe reaction conditions, and difficu...

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“…Shimizu et al [29] found that for the conversion of cellulose or cellobiose, the yield of glucose in aqueous medium at 423 K increased in the order of H 3 [30]. Our studies revealed that heteropolyacids could also catalyze the conversion of cellulose in methanol or ethanol to methyl or ethyl glucosides [31,32].…”

Section: Introductionmentioning

confidence: 59%

Development of Bifunctional Catalysts for the Conversions of Cellulose or Cellobiose into Polyols and Organic Acids in Water

et al. 2012

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The efficient utilization of renewable lignocellulosic biomass has attracted much attention in recent years. One of the most desirable routes for the transformation of cellulose, the main component of lignocellulosic biomass, is to convert cellulose under mild conditions selectively into a value-added chemical or into a platform compound, which can be easily converted to versatile chemicals or fuels in the subsequent step. The activation of cellulose, typically starting by the cleavage of its glycosidic bonds, under mild conditions and the selective formation of a particular molecule are critical challenges. Bifunctional catalysts coupling the acid sites for the activation of the glycosidic bonds via hydrolysis and the metal nanoparticles for the hydrogenation or oxidation of glucose intermediate have shown promising performances for the conversion of cellulose or cellobiose into hexitols or gluconic acid in water under mild conditions. This short review has summarized some recent studies on the development of such bifunctional catalysts or catalytic systems. The following two kinds of bifunctional catalysts or catalytic systems have mainly been discussed: (1) a liquid acid in combination with a supported metal catalyst, (2) solid acid-supported metal nanoparticles. Emphases have been laid on the conversions of cellulose or cellobiose into sorbitol and gluconic acid catalyzed respectively by ruthenium and gold nanoparticles loaded on carbon nanotubes bearing acid sites.National Natural Science Foundation of China [21173172, 21103143, 21033006]; Research Fund for the Doctoral Program of High Education [20090121110007]; National Basic Research Program of China [2010CB732303]; Key Scientific Project of Fujian Province [2009HZ0002-1]; Program for Changjiang Scholars and Innovative Research Team in University [IRT1036

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Saccharification of Natural Lignocellulose Biomass and Polysaccharides by Highly Negatively Charged Heteropolyacids in Concentrated Aqueous Solution

Cited by 124 publications

References 47 publications

Conversion of lignocellulose into renewable chemicals by heterogeneous catalysis

Conversion of lignocellulose into renewable chemicals by heterogeneous catalysis

One-Pot Synthesis of Furans from Various Saccharides Using a Combination of Solid Acid and Base Catalysts

Development of Bifunctional Catalysts for the Conversions of Cellulose or Cellobiose into Polyols and Organic Acids in Water

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