Facile pretreatment of lignocellulosic biomass using deep eutectic solvents

Zhang, Chengwu; Xia, Shuqian; Ma, Peisheng

doi:10.1016/j.biortech.2016.07.026

Cited by 386 publications

(173 citation statements)

References 22 publications

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“…For example, ChCl/imidazole can be used to pretreat corncob at a relatively low temperature of 80 °C and the final glucose yield reached 92.3% after the enzymatic hydrolysis (Procentese et al 2015). Due to the diversity of HBDs, researchers have more choice of using different HBDs in conjunction with ChCl for pretreatment; thus, different results are obtained normally, even for the same biomass like corncob (Zhang et al 2016). Considering the relative cheapness of ILs, it is useful to develop more cellulase-compatible DESs, making it possible to omit the separation of DESs from the system.…”

Section: The Application Of Dess In Biocatalysismentioning

confidence: 99%

Recent progress on deep eutectic solvents in biocatalysis

Zheng

Zong

et al. 2017

Bioresour. Bioprocess.

286

161

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Deep eutectic solvents (DESs) are eutectic mixtures of salts and hydrogen bond donors with melting points low enough to be used as solvents. DESs have proved to be a good alternative to traditional organic solvents and ionic liquids (ILs) in many biocatalytic processes. Apart from the benign characteristics similar to those of ILs (e.g., low volatility, low inflammability and low melting point), DESs have their unique merits of easy preparation and low cost owing to their renewable and available raw materials. To better apply such solvents in green and sustainable chemistry, this review firstly describes some basic properties, mainly the toxicity and biodegradability of DESs. Secondly, it presents several valuable applications of DES as solvent/co-solvent in biocatalytic reactions, such as lipase-catalyzed transesterification and ester hydrolysis reactions. The roles, serving as extractive reagent for an enzymatic product and pretreatment solvent of enzymatic biomass hydrolysis, are also discussed. Further understanding how DESs affect biocatalytic reaction will facilitate the design of novel solvents and contribute to the discovery of new reactions in these solvents.

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Section: The Application Of Dess In Biocatalysismentioning

confidence: 99%

Recent progress on deep eutectic solvents in biocatalysis

Zheng

Zong

et al. 2017

Bioresour. Bioprocess.

286

161

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“…However, it is still unsatisfactory in the recovery of the hemicellulose and lignin. Although current studies on pretreatment systems for removing lignin or breaking the biomass recalcitrance has focused on the ionic liquids (ILs) [23][24][25][26][27] and deep eutectic solvents (DESs) pretreatments [28][29][30][31][32], the challenge of the cellulose valorization without compromises of lignin and hemicellulose fractions is still unresolved.…”

Section: Introductionmentioning

confidence: 99%

High Purity and Low Molecular Weight Lignin Nano-Particles Extracted from Acid-Assisted MIBK Pretreatment

Zhang

Guo

et al. 2020

Polymers

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A simple and economical biorefinery method, organosolv methyl isobutyl ketone (MIBK) pretreatment assisted by Lewis acid ferric trichloride hydrolysis, was proposed for fractionating the lignin from extractive-free Eucalyptus powder at the nanoscale, accompanied by another product furfural, derived from hemicellulose. Under the conditions (180 • C, 1 h) optimized based on the best yield of furfural, 40.13% of the acid-insoluble lignin (AIL) could be obtained with a high purity of 100%, a low molecular weight of 767 (M n ) and improved thermostability. The extracted lignin was characterized by its chemical structure, thermostability, homogeneity, molecular weight, and morphology as compared with milled wood lignin (MWL). The results showed significant variations in chemical structures of the extracted lignin during the pretreatment. Specifically, the aryl ether linkage and phenylcoumarans were broken severely while the resinols were more resistant. The G-type lignin was more sensitive to degradation than the S-type, and after the pretreatment, H-type lignin was formed, indicating the occurrence of a demethoxylation reaction at high temperature. Moreover, the lignin nano-particles were identified visually by AFM and TEM images. The dynamic light scattering (DLS) showed that the average diameter of the measured samples was 131.8 nm, with the polydispersity index (PDI) of 0.149. The MIBK-lignin nano-particles prepared in our laboratory exhibit high potentials in producing high functional and valuable materials for the application in wide fields.Author Contributions: Conceptualization, Q.Z.; methodology, H.L. and Z.G.; software, Q.Z.; validation, F.X.; formal analysis, Q.Z., H.L. and Z.G.; investigation, Q.Z.; resources, F.X.; data curation, Q.Z.; writing-original draft preparation, Q.Z.; writing-review and editing, Q.Z. and F.X.; visualization, Q.Z.; supervision, F.X.; project administration, F.X.; funding acquisition, F.X. All authors have read and agreed to the published version of the manuscript.

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“…Zhang et al. tested the effect of three DES on corncob delignification. CC/glycerol (1:2) removed 71.3 % lignin from corncob and after subsequent hydrolysis with the enzyme cellulase, 96.4 % glucose was produced, the highest amongst the DES tested.…”

Section: Promising Solutionsmentioning

confidence: 95%

“…Microwave-assisted DES pretreatment has been reported to significantly reduce pretreatment time to as low as 45 s [35] compared to ordinary DES pretreatment. Zhang et al [36] tested the effect of three DES on corncob delignification. CC/glycerol (1:2) removed 71.3 % lignin from corncob and after subsequent hydrolysis with the enzyme cellulase, 96.4 % glucose was produced, the highest amongst the DES tested.…”

Section: Microwave-assisted Deep Eutectic Solvent Pretreatmentmentioning

confidence: 99%

Lactic Acid Production from Lignocellulose – A Review of Major Challenges and Selected Solutions

et al. 2020

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The industrial application of lactic acid is very broad; hence, the high demand is forecasted to multiply in the future. This review presented the major problems for the efficient production of lactic acid from lignocellulose biomass using lactic acid bacteria (LAB) and further proposes three promising solutions to solve these problems, exposing their potentials and future research needs. Recombinant cellulolytic strategy in LAB promises a significant reduction of lactic acid production costs, however, extensive research on genetic engineering is still needed. Microwave‐assisted deep eutectic solvent pretreatment is extremely fast and produces little to no harmful by‐products, but it has not been investigated for lactic acid production yet. Continuous simultaneous saccharification and fermentation with enzyme and cell recycle is newly proposed by the authors as a process set up that can solve the problems of feedback‐, substrate‐ and end‐product inhibition while resulting in higher lactic acid productivities, yield, and concentration.

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Facile pretreatment of lignocellulosic biomass using deep eutectic solvents

Cited by 386 publications

References 22 publications

Recent progress on deep eutectic solvents in biocatalysis

Recent progress on deep eutectic solvents in biocatalysis

High Purity and Low Molecular Weight Lignin Nano-Particles Extracted from Acid-Assisted MIBK Pretreatment

Lactic Acid Production from Lignocellulose – A Review of Major Challenges and Selected Solutions

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