Recent advances in catalytic production of sugar alcohols and their applications

Zada, Bakht; Chen, Mengyuan; Chen, Chubai; Liang, Yan; Xu, Qing; Li, Wenzhi; Guo, Qing‐Xiang; Fu, Yao

doi:10.1007/s11426-017-9067-1

Cited by 73 publications

(52 citation statements)

References 129 publications

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“…Obviously, xylitol was derived from hemicellulose, whereas glycerol can be product of both hemicellulose and cellulose. [31][32][33] In addition, two smaller hydrolysis products were detected, i.e., formic acid and acetic acid, with yield of 1-5 wt%. Therefore, though carboxylic acids are mostly reported as oxidized products in the aerobic alkaline hydrolysis of cellulose, [34,35] hemicellulose and lignin, [13,36] formic and acetic acid can also be generated in the absence of oxygen.…”

Section: Lignocellulose Hydrolysis/conversion To Monosaccharides Alcmentioning

confidence: 99%

Revisiting Alkaline Pretreatment of Lignocellulose: Understanding the Structural Evolution of Three Components

Zhu

Liu

et al. 2020

Advanced Sustainable Systems

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chemicals (for instance, monophenols) is difficult because of its structural heterogeneity and bio-recalcitrance nature. [3] Therefore, valorization of lignocellulose is mostly started with its fractionation into three components, which is of great importance for the exploration of the maximum potential value of lignocellulose. To date, many methods have been used to fractionate or/and convert lignocellulose, such as acidic pretreatment, [4] alkaline pretreatment, [5-9] reductive catalytic fractionation (RCF), [10-12] oxidative catalytic fractionation (OCF), [13] organosolv pretreatment, [14] ionic liquids pretreatment, [15,16] and deep eutectic solvent extraction (DES). [17,18] Wherein, alkaline pretreatment is one of the most used and efficient pretreatment, which has been widely employed in pulping industry and researches. [5] Nowadays, many alkaline pretreatment technologies have been developed, such as ammonia pretreatment, lime (Ca(OH) 2) pretreatment, sodium hydroxide (NaOH) and sodium carbonate (Na 2 CO 3) pretreatments. By using these methods, hemicellulose and lignin can be dissolved in the alkaline solution, while cellulose can be obtained as solid residue. In general, the fractionation rate of the lignin increases accordingly with the hydroxyl ions concentration. [5,19] Therefore, strong base, i.e., NaOH pretreatment has the highest efficiency on delignification, and so as the hemicellulose dissolution, when compared to other alkaline pretreatments. Thus, NaOH pretreatment has been drawing increasing attention for over hundred years by researchers and is widely used in industrial production. [5-9] However, the products in the downstream are complicated and unknown in the NaOH pretreatment. In recent years, conversion of lignin has been drawing increasing attentions and lignin is reported to be converted into many value-added chemicals that have variety of applications, by up-to-date technologies. [12,20-22] To extract more value from lignocellulose, not only conversion of carbohydrate, but also valorization of lignin should be taken into account. Before their valorization, chemical characters of carbohydrate and lignin should be clear. However, most of the researches aimed to obtain carbohydrates and to enzymatic hydrolysis of carbohydrates. [6-8] Chemical structure of three components after NaOH pretreatment, especially lignin, remains unclear. In this work, pine (softwood), comprising mainly of G-type

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Section: Lignocellulose Hydrolysis/conversion To Monosaccharides Alcmentioning

confidence: 99%

Revisiting Alkaline Pretreatment of Lignocellulose: Understanding the Structural Evolution of Three Components

Zhu

Liu

et al. 2020

Advanced Sustainable Systems

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“…The conversion of resource-abundant, renewable, and nonedible cellulosic biomass to high-value chemicals is beneficial to the development of a sustainable society. In particular, the direct catalytic conversion of cellulose to polyols is an important part of biorefinery, which has attracted extensive interest to meet the world's energy needs [236][237][238][239][240][241][242]. In this section, we focus on the recent developments in the chemical catalytic conversion of cellulosic biomass into ethylene glycol (EG) and sorbitol, which are widely used in the food industry, pharmaceutical production, cosmetics, and so on.…”

Section: Direct Catalytic Conversion Of Cellulose Into Key Platform Mmentioning

confidence: 99%

Chemocatalytic Conversion of Cellulose into Key Platform Chemicals

Liu

et al. 2018

International Journal of Polymer Science

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Chemocatalytic transformation of lignocellulosic biomass to value-added chemicals has attracted global interest in order to build up sustainable societies. Cellulose, the first most abundant constituent of lignocellulosic biomass, has received extensive attention for its comprehensive utilization of resource, such as its catalytic conversion into high value-added chemicals and fuels (e.g., HMF, DMF, and isosorbide). However, the low reactivity of cellulose has prevented its use in chemical industry due to stable chemical structure and poor solubility in common solvents over the cellulose. Recently, homogeneous or heterogeneous catalysis for the conversion of cellulose has been expected to overcome this issue, because various types of pretreatment and homogeneous or heterogeneous catalysts can be designed and applied in a wide range of reaction conditions. In this review, we show the present situation and perspective of homogeneous or heterogeneous catalysis for the direct conversion of cellulose into useful platform chemicals.

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“…It is employed as a low-calorie sweetener, as a humectant in cosmetics and pharmaceutical products, and as an intermediate platform for the production of value-added molecules (e.g., 1,4-sorbitan, isosorbide, glycols, l-ascorbic acid, etc.) [5][6][7]. This versatility led to its inclusion in the top derived value-added chemicals to be converted into high-value bio-based products from biomass [8].…”

Section: Introductionmentioning

confidence: 99%

“…The reaction mechanism consists of the reduction of carbonyl groups of saccharides under hydrogen pressure in the presence of a solid metal catalyst based on Ni, Pd, Pt, or Ru [15,16]. All these catalysts are easily recoverable and display good catalytic activity in terms of sorbitol yield, operating under aqueous-phase solution [6,[17][18][19][20]. In recent years, Raney nickel and ruthenium catalysts made a clean sweep on sorbitol production.…”

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confidence: 99%

Production of Sorbitol via Catalytic Transfer Hydrogenation of Glucose

et al. 2020

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Featured Application: Catalytic transfer hydrogenation from alcohols allow converting under mild reaction conditions glucose into sorbitol.Abstract: Sorbitol production from glucose was studied through catalytic transfer hydrogenation (CTH) over Raney nickel catalysts in alcohol media, used as solvents and hydrogen donors. It was found that alcohol sugars, sorbitol and mannitol, can be derived from two hydrogen transfer pathways, one produced involving the sacrificing alcohol as a hydrogen donor, and a second one involving glucose disproportionation. Comparison between short-chain alcohols evidenced that ethanol was able to reduce glucose in the presence of Raney nickel under neutral conditions. Side reactions include fructose and mannose production via glucose isomerization, which occur even in the absence of the catalyst. Blank reaction tests allowed evaluating the extension of the isomerization pathway. The influence of several operation parameters, like the temperature or the catalyst loading, as well as the use of metal promoters (Mo and Fe-Cr) over Raney nickel, was examined. This strategy opens new possibilities for the sustainable production of sugar alcohols.Sorbitol production was reported to be carried out using cellulose in the presence of noble metals [9] and transition metal-based catalysts [10,11]. However, a most extended alternative is its production starting from glucose. At an industrial scale, sorbitol is produced via glucose hydrogenation [2] as it is the most affordable precursor [12], whose production is liable to be obtained via cellulose hydrolysis [13,14]. The reaction mechanism consists of the reduction of carbonyl groups of saccharides under hydrogen pressure in the presence of a solid metal catalyst based on Ni, Pd, Pt, or Ru [15,16]. All these catalysts are easily recoverable and display good catalytic activity in terms of sorbitol yield, operating under aqueous-phase solution [6,[17][18][19][20]. In recent years, Raney nickel and ruthenium catalysts made a clean sweep on sorbitol production. Ru presents higher activity and selectivity to sorbitol [16,21] than Raney nickel catalysts, but this metal is much more expensive than nickel-based catalysts. In this way, Raney nickel was revealed as the most interesting active phase to be used in the industrial-scale hydrogenation of glucose [21,22], mostly because of its low price [23]. Nevertheless, the lower catalytic activity of nickel as compared to other precious-metal-based conventional hydrogenation catalysts, such as ruthenium, results in the need for high hydrogen pressure and harsh operating conditions. Consequently, a significant energy demand must be satisfied compared to that required when using more active hydrogenation catalysts and, thus, higher environmental impacts are associated with the use of Raney nickel catalysts [24].This work focuses on gaining insights into a developing alternative reaction pathway to the conventional hydrogenation procedure used to transform glucose into sorbitol by exploring the feasibility of car...

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Recent advances in catalytic production of sugar alcohols and their applications

Cited by 73 publications

References 129 publications

Revisiting Alkaline Pretreatment of Lignocellulose: Understanding the Structural Evolution of Three Components

Revisiting Alkaline Pretreatment of Lignocellulose: Understanding the Structural Evolution of Three Components

Chemocatalytic Conversion of Cellulose into Key Platform Chemicals

Production of Sorbitol via Catalytic Transfer Hydrogenation of Glucose

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