Contribution to the production and use of biomass-derived solvents – a review

Kochepka, Débora Merediane; Dill, Laís Pastre; Fockink, Douglas H.; Bogel‐Łukasik, Rafał

doi:10.32933/actainnovations.35.3

Cited by 21 publications

(18 citation statements)

References 145 publications

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“…The selection of the pre-treatment method depends on the biomass type as well as the desired product, e.g., the delivery of upgradable sugars or lignin-derived commodities. Several pre-treatment technologies are currently employed to overcome the recalcitrance of lignocellulose, to increase hydrolysis efficiency and to improve the yields to monomeric sugars [8][9][10][11]. Among them are mostly chemical methods, e.g., with acids or alkali.…”

Section: Introductionmentioning

confidence: 99%

Imidazole Processing of Wheat Straw and Eucalyptus Residues—Comparison of Pre-Treatment Conditions and Their Influence on Enzymatic Hydrolysis

Pereira¹,

Bernardo²,

Roseiro³

et al. 2021

Molecules

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Biomass pre-treatment is a key step in achieving the economic competitiveness of biomass conversion. In the present work, an imidazole pre-treatment process was performed and evaluated using wheat straw and eucalyptus residues as model feedstocks for agriculture and forest-origin biomasses, respectively. Results showed that imidazole is an efficient pre-treatment agent; however, better results were obtained for wheat straw due to the recalcitrant behavior of eucalyptus residues. The temperature had a stronger effect than time on wheat straw pre-treatment but at 160 °C and 4 h, similar results were obtained for cellulose and hemicellulose content from both biomasses (ca. 54% and 24%, respectively). Lignin content in the pre-treated solid was higher for eucalyptus residues (16% vs. 4%), as expected. Enzymatic hydrolysis, applied to both biomasses after different pre-treatments, revealed that results improved with increasing temperature/time for wheat straw. However, these conditions had no influence on the results for eucalyptus residues, with very low glucan to glucose enzymatic hydrolysis yield (93% for wheat straw vs. 40% for eucalyptus residues). Imidazole can therefore be considered as a suitable solvent for herbaceous biomass pre-treatment.

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Section: Introductionmentioning

confidence: 99%

Imidazole Processing of Wheat Straw and Eucalyptus Residues—Comparison of Pre-Treatment Conditions and Their Influence on Enzymatic Hydrolysis

Pereira¹,

Bernardo²,

Roseiro³

et al. 2021

Molecules

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“…[6][7][8][9][10] Therefore, it is of great significance to develop an environment-friendly lignin dissolving solvent. [11] Room temperature ionic liquids (ILs), which are considered as ideal green solvents, due totheir advantages such as width of liquid range, excellent dissolution ability, free from the influence of vapor pressure and easy recovery. Due to these, the use of ionic liquid to substitute volatile organic compounds in many processes including biomass dissolution, pre-treatment, extraction, fractionation and catalysis.…”

Section: Introductionmentioning

confidence: 99%

“…Lignin has attracted more and more attention due to its increasing use in the production of bulk, fine and functional aromatic compounds, as well as aliphatic cyclic alcohols, aviation fuels and aliphatic hydrocarbons [6–10] . Therefore, it is of great significance to develop an environment‐friendly lignin dissolving solvent [11] …”

Section: Introductionmentioning

confidence: 99%

Rheological Characterization of Mixed Aqueous Solutions of Enzymatic Hydrolysis Lignin and Ionic Liquid

Zheng

et al. 2022

ChemistrySelect

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Here we present a rheological study of enzymatic hydrolysis lignin (EH lignin) in 1-butyl-3-methylimidazolium chloride ([C 4 min]Cl) aqueous solutions. The effects of ionic liquid mass fraction, shear rate and temperature on the viscosity and macromolecular chain configuration of EH lignin / C 4 min] Cl aqueous solution were studied. The results showed that the viscosity of the aqueous solutions increased with the increase of lignin content. The mass percentages of overlapping and winding, responding to divisions of lignin macromolecules existence state, were varied with changing in the temperature and mass percentages of ionic liquid. Increasing the mass of ionic liquid will significantly change the viscosity of lignin solution. Most of the lignin solutions had shear thinning behavior, suggesting that macromolecular chains of lignin moved with orientation to the fluid, and disentangled under the shear force. The viscosity of lignin solution decreased with the increase of temperature, and the viscosity activation energy increased with the increase of lignin or ionic liquid mass fraction.

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“…The condensed lignin is less reactive and, therefore, less amenable to high value utilization through further processing. Despite recent efforts in using fractionation and membrane separation technologies to upgrade technical lignin (Gillet et al, 2017) along with novel fractionation processes to produce less condensed lignin (Kochepka et al, 2020; Morais et al, 2015), commercial viability, and success of these efforts yet need to be seen.…”

Section: Introductionmentioning

confidence: 99%

Maleic acid hydrotropic fractionation of wheat straw to facilitate value‐added multi‐product biorefinery at atmospheric pressure

et al. 2021

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Wheat straw was rapidly fractionated using maleic acid (MA) as an acid hydrotrope at atmospheric pressure under a range of conditions. MA hydrotropic fractionation (MAHF) was very selective in dissolving lignin and hemicelluloses resulting in a cellulose‐rich water insoluble solids (WIS), which was evaluated for producing fibers through bleaching and cellulosic nanofibrils by fibrillation, as well as glucose through enzymatic saccharification. The residual lignin (RL) within the WIS has a low degree of condensation, which eased bleaching. The RL was also carboxylated through MAHF, which facilitated nanofibrillation to produce lignin‐containing cellulose nanofibrils. The carboxylation also aided enzymatic saccharification of WIS by decreasing nonproductive cellulase binding to RL through electrostatic repulsion between carboxylated (charged) RL and the cellulase at elevated pH (>cellulase isoelectric point). The dissolved lignin (DL) from MAHF also has a low degree of condensation, making it favorable for further catalytic conversion. Carboxylation improved DL antioxidant capability. MA is an FDA‐approved indirect food additive (21CFR175‐177) and is much less corrosive than other acids typically used for cellulosic fractionation. It is also less soluble which is a distinct and very promising advantage for acid recovery. Therefore, MAHF has notable advantages and significant potential for sustainable biorefinery.

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Contribution to the production and use of biomass-derived solvents – a review

Cited by 21 publications

References 145 publications

Imidazole Processing of Wheat Straw and Eucalyptus Residues—Comparison of Pre-Treatment Conditions and Their Influence on Enzymatic Hydrolysis

Imidazole Processing of Wheat Straw and Eucalyptus Residues—Comparison of Pre-Treatment Conditions and Their Influence on Enzymatic Hydrolysis

Rheological Characterization of Mixed Aqueous Solutions of Enzymatic Hydrolysis Lignin and Ionic Liquid

Maleic acid hydrotropic fractionation of wheat straw to facilitate value‐added multi‐product biorefinery at atmospheric pressure

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