lignocellulose fractionation and lignin depolymerization

Lignocellulose fractionation and lignin depolymerization …

The combined system can fractionate lignocellulosic biomass into cellulosic materials with a lignin content as low as 0.95% and shows a delignification rate of up to 98.0%.,Lignocellulose Fractionation and Lignin Depolymerization … ,Herein, an aqueous glycerol/acidic ionic liquid (AGAIL) process of coir was carried out under atmospheric and autogenerated pressure to investigate the lignocellulose fractionation and understand the main conversion products generated during the process.,Lignin Depolymerisation and Lignocellulose Fractionation … ,We explored the depolymerisation of several lignins in liquid ammonia at relatively high temperatures and pressures (120 °C and 88 bar). Five different lignins were tested: Indulin AT kraft, Protobind 1000 soda, wheat straw organosolv, poplar organosolv and elephant grass-milled wood lignin (EG MWL).

Lignocellulose Fractionation and Lignin Depolymerization …

Request PDF | On Apr 17, 2018, Tulong Ouyang and others published Lignocellulose Fractionation and Lignin Depolymerization Using Glycerol and Acidic Ionic Liquids: Identification of the Main …,Lignocellulose Fractionation and Lignin Depolymerization … ,Difficulties in fractionation and subsequent conversion of lignocellulosic biomass have restricted the development of sustainable biorefineries of lignocellulosic materials. Herein, an aqueous glycerol/acidic ionic liquid (AGAIL) process of coir was carried out under atmospheric and autogenerated pressure to investigate the lignocellulose fractionation and understand the main conversion …,Lignocellulose Fractionation and Lignin Depolymerization … ,Lignocellulose Fractionation and Lignin Depolymerization Using Glycerol and Acidic Ionic Liquids: Identification of the Main Products by GC-MS

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combined system can fractionate lignocellulosic biomass into cellulosic materials with a lignin content as low as 0.95% and shows a delignification rate of up to 98.0%. Interestingly, the solvent system based on aqueous glycol solution and acidic ionic liquid,Chemicals from lignin: an interplay of lignocellulose … ,During fractionation, this can be achieved by either (i) preserving the (native) lignin structure or (ii) by tolerating depolymerisation of the lignin polymer but preventing condensation through chemical quenching or physical removal of reactive intermediates.,Chemicals from lignin: An interplay of lignocellulose … ,During fractionation, this can be achieved by either (i) preserving the (native) lignin structure or (ii) by tolerating depolymerisation of the lignin polymer but preventing condensation through…

Lignin Depolymerisation and Lignocellulose Fractionation …

Lignin Depolymerisation and Lignocellulose Fractionation by Solvated Electrons in Liquid Ammonia ChemSusChem . 2017 Mar 9;10(5):1022-1032. doi: 10.1002/cssc.201601608.,Lignocellulose Fractionation and Lignin Depolymerization … ,Difficulties in fractionation and subsequent conversion of lignocellulosic biomass have restricted the development of sustainable biorefineries of lignocellulosic materials. Herein, an aqueous glycerol/acidic ionic liquid (AGAIL) process of coir was carried out under atmospheric and autogenerated pressure to investigate the lignocellulose fractionation and understand the main conversion …,Lignocellulose Fractionation and Lignin Depolymerization … ,Lignocellulose Fractionation and Lignin Depolymerization Using Glycerol and Acidic Ionic Liquids: Identification of the Main Products by GC-MS

Lignocellulose Fractionation and Lignin Depolymerization …

Request PDF | On Apr 17, 2018, Tulong Ouyang and others published Lignocellulose Fractionation and Lignin Depolymerization Using Glycerol and Acidic Ionic Liquids: Identification of the Main …,Lignin‐First Fractionation of Softwood Lignocellulose … ,which accomplish the depolymerization of lignin in its native form during the lignocellulose fractionation process.[9] These novel strategies focus on the use of aheterogeneousmetal catalystand hydrogen gas.[10–19] Previously,wehave found that stabilization of reactive inter-mediates during acid-catalyzed depolymerization of lignin,Recent advances in lignocellulose prior-fractionation for … ,Until now, there are three difficulties to overcome in the lignin isolation and effective in-suit depolymerization from lignocellulose via one-pot methods: (1) breaking the natural recalcitrance of cell wall to release sugars and phenolic intermediate, (2) decreasing the oxygen content of phenolic intermediate to obtain the stable fuel with …

Lignocellulose – Lignin and Cellulose

Depolymerization of lignin typically results in complex mixtures comprising a wide array of phenolics, bearing a variety of oxygen-based functionalities and covering a broad range of molecular weights. However, in many cases, valorization of these lignols can only be pursued from well-defined fractions.,Coupling organosolv fractionation and reductive … ,For instance, reductive lignocellulose fractionation and lignin hydrogenolysis can be separated in two beds in a continuous flow process. Lignin is extracted in the first bed and converted to monomers by the catalyst (e.g., Pd/C or Ni/C mixed with SiO 2) in the second bed.25,26 A third approach is to separate the two,β‐Zeolite‐Assisted Lignin‐First Fractionation in a Flow … ,Particularly, reductive catalytic fractionation (RCF) is a popular lignin-first valorization strategy, 11, 12 where metals such as Pd or Ru are employed as catalysts for the hydrogenation of allylic alcohols, which are highly reactive intermediates that are believed to play a key role during lignin recondensation. 13-15 RCF requires pressurized …

Lignocellulose Fractionation and Lignin Depolymerization …

Additionally, the depolymerization capacity of the AGAIL system on lignin was also estimated by analyzing the main degradation products. The results indicated that the process under autogenerated pressure presented much higher delignification efficiency and more effective lignocellulose conversion capability than those under atmospheric pressure.,Reductive lignocellulose fractionation into soluble lignin … ,Reductive lignocellulose fractionation into soluble lignin-derived phenolic monomers and dimers and processable carbohydrate pulps … Mechanocatalytic Depolymerization of Lignocellulose Performed on Hectogram and Kilogram Scales …,Lignocellulose – Lignin and Cellulose ,Depolymerization of lignin typically results in complex mixtures comprising a wide array of phenolics, bearing a variety of oxygen-based functionalities and covering a broad range of molecular weights. However, in many cases, valorization of these lignols can only be pursued from well-defined fractions.

Chemicals from Lignin: An Interplay of Lignocellulose …

@article{osti_1417797, title = {Chemicals from Lignin: An Interplay of Lignocellulose Fractionation, Depolymerisation, and Upgrading}, author = {Beckham, Gregg T and Schutyser, Wouter and Renders, Tom and Van den Bosch, Sander and Koelewijn, Steven-Friso and Sels, Bert F.}, abstractNote = {In pursuit of more sustainable and competitive biorefineries, the effective valorisation of lignin is key.,Complete lignocellulose conversion with integrated … ,Van den Bosch, S. et al. Reductive lignocellulose fractionation into soluble lignin-derived phenolic monomers and dimers and processable carbohydrate pulps. Energy Environ. Sci. 8, 1748–1763 (2015).,Hydrogen-free catalytic fractionation of woody biomass ,The pulping industry could become a biorefinery if the lignin and hemicellulose components of the lignocellulose are valorized. Conversion of lignin into well-defined aromatic chemicals is still a major challenge.

Chemicals from lignin: an interplay of lignocellulose …

An alluring opportunity is the exploitation of lignin as a resource for chemicals. Three technological biorefinery aspects will determine the realisation of a successful lignin-to-chemicals valorisation chain, namely (i) lignocellulose fractionation, (ii) lignin,Lignin Valorization through Catalytic Lignocellulose … ,Toward complete valorization: This review covers an approach in which the lignin valorization is performed in concert with the pulping process.This enables the fractionation of all components of the lignocellulosic biomass into valorizable streams. The historic, current, and future perspectives, with respect to catalytic lignocellulose fractionation processes, are presented.,Holistic Valorization of Hemp through Reductive Catalytic … ,Reductive catalytic fractionation (RCF) is a promising strategy that integrates lignin depolymerization with biomass fractionation using heterogeneous catalysis. It produces lignin-derived aromatic monomers and oligomers along with carbohydrate pulps and sugars.

Lignin Depolymerisation and Lignocellulose Fractionation …

Lignin Depolymerisation and Lignocellulose Fractionation by Solvated Electrons in Liquid Ammonia Abstract We explored the depolymerisation of several lignins in liquid ammonia at relatively high temperatures and pressures (120 °C and 88 bar).,Lignin Depolymerisation and Lignocellulose Fractionation … ,Lignin Depolymerisation and Lignocellulose Fractionation by Solvated Electrons in Liquid Ammonia … Depolymerization Electrons Journal Article Lignin Lignocellulose Liquid ammonia Research Support, Non-U.S.,Lignin Depolymerisation and Lignocellulose Fractionation … ,Lignin Depolymerisation and Lignocellulose Fractionation by Solvated Electrons in Liquid Ammonia.: We explored the depolymerisation of several lignins in liquid Five different lignins were tested: Indulin AT kraft, Protobind 1000 soda, wheat straw organosolv, poplar organosolv and elephant grass-milled wood lignin (EG MWL).

Mechanocatalytic Depolymerization of Lignocellulose …

Mechanocatalytic depolymerization of lignocellulose constitutes a new frontier in biorefining. In a one-pot process, the combination of mechanical forces and acid catalysis leads to the full conversion of (dried) lignocellulose into water-soluble products (oligosaccharides and lignin fragments).,Reductive lignocellulose fractionation into soluble lignin … ,Reductive lignocellulose fractionation into soluble lignin-derived phenolic monomers and dimers and processable carbohydrate pulps … Mechanocatalytic Depolymerization of Lignocellulose Performed on Hectogram and Kilogram Scales …,Bright Side of Lignin Depolymerization: Toward New … ,Lignocellulose fractionation processes usually require the addition of acid or alkaline additives in order to enhance lignin and/or hemicellulose removal at lower temperature and pressure. 11 Therefore, such additives were also applied in the catalytic lignocellulose fractionation (Figure Figure17 17).

Hydrothermal Depolymerization of Kraft Lignins with Green …

Reductive catalytic fractionation of lignocellulose is a promising "lignin-first" biorefinery strategy wherein lignin is solvolytically extd. from the cell wall matrix and simultaneously disassembled, resulting in a stable lignin oil and a solid carbohydrate-rich residue.,Two-step liquefication process of lignocellulose in … ,The use of lignocellulosic biomass to produce biofuels and biobased products requires effective fractionation and valorization of the three main lignocellulose constituents. A novel two-step process was developed using acetone/H2O as solvent to fractionate lignocellulose into cellulose, hemicellulose derivatives, and lignin, followed by non-enzymatic hydrolysis of recovered cellulose into …,Fractionation of Lignin with Decreased Heterogeneity … ,Industrial lignin fractionation is attracting increasing interest due to its enormous potential in the development of high value-added materials. However, the widely reported fractionation approaches are primarily focused on the separation of fractions with a low polydispersity index (PDI).