Lignocellulosic biomass pretreatment by deep eutectic solvents on lignin extraction and saccharification enhancement: A review

Wang, Wei; Lee, Dong Hoon

doi:10.1016/j.biortech.2021.125587

Cited by 247 publications

(81 citation statements)

References 115 publications

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“…Recently, DESs have gained attention as alternative solvents for the pretreatment of lignocellulosic biomass. 67,68 However, the use of metal chloride-based DESs in the pretreatment of lignocellulosic biomass has not been studied, but we hypothesize that these DESs have the potential to significantly solubilize biomass. To investigate this hypothesis, the solubility parameters of mDESs were calculated using the MD simulation approach (Table 1).…”

Section: Resultsmentioning

confidence: 98%

“…There are several literature reports on the delignification of biomass using ionic liquids and deep eutectic solvents. 14,38,67,68,70 Therefore, we explored Hansen solubility parameters as a tool to understand the delignification of biomass in ILs/DESs. Recently, Achinivu et al (2021) studied the delignification of sorghum biomass using different molecular solvents such as amines and organic solvents.…”

Section: Resultsmentioning

confidence: 99%

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Prediction of solubility parameters of lignin and ionic liquids using multi-resolution simulation approaches

et al. 2022

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Prediction of solubility parameters of lignin and ionic liquids using multi-resolution simulation approaches

et al. 2022

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“…It is well known that a DES, as a new pretreatment solvent, can effectively isolate various components of biomass, so as to promote the saccharification or fermentation of residues. , In order to confirm the combined action of BL-oil and ChCl for CS composition separation, the single BL-oil/ChCl washing pretreatment and three commercial DES pretreatments (acetic-DES, urea-DED, and phenol-DES) were used as the control groups. Among them, selection of acetic-DES and phenol-DES was attributed to the high content of acetic acid and phenol in BL-oil, while urea-DES was a common and widely studied DES, which was a more commercial representative compared with acetic-DES and phenol-DES.…”

Section: Resultsmentioning

confidence: 99%

Pretreatment Influence of an Imitative Deep Eutectic Solvent Composed of Biomass Light Oil and Choline Chloride on Boosting Selective Saccharification during Corn Stalk Pyrolysis

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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As a novel pretreatment method, a deepeutectic solvent (DES) can effectively deconstruct lignocellulose to promote its selective saccharification. In this research, biomass light oil (BL-oil) and choline chloride (ChCl) were employed to prepare a novel, low-cost imitative DES to boost pyrolytic saccharification of corn stalk (CS). The physical−chemical properties of original CS and pretreated samples were investigated. Furthermore, the influence of mass ratio of BL-oil and ChCl as well as pretreated temperature on pyrolytic product distribution was studied. The results showed that the imitative DES had a similar pretreated effect to commercial DESs, which can destroy the structure of CS to facilitate the degradation of hemicellulose and lignin. In addition, the imitative DES was more conducive to removal of alkali metals and alkaline earth metals. The yield of levoglucosan increased from 2.59 to 59.87 mg/g under the optimum imitative DES pretreated condition. The preparation and utilization of a biomass-derived imitative DES broadened the application of biomass pyrolysis oil and realized the "closed-loop" concept of biorefinery.

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“…The reason for such price differences was due to the variations in prices of ChCl (65 USD kg −1 ), urea (20 USD kg −1 ), and LA (0.56 USD kg −1 ). [207] Also, the bioethanol yield was higher for ChCl:LA (0.21 ton ton −1 ) compared to the ChCl:urea (0.17 ton ton −1 ) DES pretreatment, thus indicating ChCl:LA to be optimum and interesting choice for the pretreatment of biomass. Moreover, the MESP was significantly lower for the pretreatment of sugarcane bagasse with phosphoric acid (3250 USD ton −1 ).…”

Section: Economic Analysismentioning

confidence: 93%

Recent Advances in the Valorization of Lignin: A Key Focus on Pretreatment, Characterization, and Catalytic Depolymerization Strategies for Future Biorefineries

Mankar

Modak

Pant

2021

Advanced Sustainable Systems

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In this regard, lignocellulosic biomass (LCB) is an attractive alternative due to its abundant availability, carbon neutral nature, and its ability to produce a wide range of fuels and chemicals. [11,12] LCB mainly consists of cellulose (30% to 50%), hemicellulose (20% to 35%), and lignin (15% to 30%), interlinked with each other via a complex bonding network. [13,14] Currently, most of the biorefineries are focusing on the utilization of carbohydrates (cellulose and hemicellulose) for producing bio-ethanol and other chemicals. Moreover, lignin is the major by-product of pulp and paper industry with an annual production of 50 to 70 million tons. [15] However, lignin is mostly burned as a low-value fuel in the industries. [16] Interestingly, it is the only renewable source of aromatic monomers, thus making it a fascinating candidate to produce wide range of aromatics.Lignin is a highly complex 3D heteropolymer, consisting of methoxylated phenylpropanoid units (S unit, G unit, H unit), for providing structural rigidity to the plants. It consists of several COC (α-O-4, β-O-4, 4-O-5) and CC (β-1, β-β, β-5, 5-5) bonds and is interconnected to the cellulose/hemicellulose, thus making its biological or thermochemical conversion challenging (Figure 1a). [11,17] Therefore, the fractionation of LCB via different pretreatment techniques is crucial (Figure 1b). Majority of the pretreatment methods cleave COC (β-O-4) linkages of the native lignin due to their lower (218 to 314 kJ mol −1 ) bond dissociation energy (BDE) while stable CC bonds with higher (384 kJ mol −1 ) BDE are formed due to the recondensation reactions, thus modifying the lignin structure, which is named as technical lignin. [18][19][20] Lower BDE of COC bonds suggests that these bonds are relatively easier to cleave compared to CC bonds. However, depolymerization of native lignin is reported to give monomer yields of approximately seven times that of modified technical lignin. [18] Therefore, the development of new innovative pretreatment strategies that can preserve the β-O-4 linkages of the native lignin is highly desirable. Moreover, it is essential to get an in-depth knowledge of the structural modifications, occurring after the pretreatment, using the different characterization techniques like 1D/2D/3D nuclear magnetic resonance (NMR), 31 P NMR, solid-state NMR,

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Lignocellulosic biomass pretreatment by deep eutectic solvents on lignin extraction and saccharification enhancement: A review

Cited by 247 publications

References 115 publications

Prediction of solubility parameters of lignin and ionic liquids using multi-resolution simulation approaches

Prediction of solubility parameters of lignin and ionic liquids using multi-resolution simulation approaches

Pretreatment Influence of an Imitative Deep Eutectic Solvent Composed of Biomass Light Oil and Choline Chloride on Boosting Selective Saccharification during Corn Stalk Pyrolysis

Recent Advances in the Valorization of Lignin: A Key Focus on Pretreatment, Characterization, and Catalytic Depolymerization Strategies for Future Biorefineries

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