Fractionation of ‘water-soluble lignocellulose’ into C5/C6 sugars and sulfur-free lignins

  title={Fractionation of ‘water-soluble lignocellulose’ into C5/C6 sugars and sulfur-free lignins},
  author={Mats K{\"a}ldstr{\"o}m and Niklas Meine and Christophe Far{\'e}s and Roberto Rinaldi and Ferdi Sch{\"u}th},
  journal={Green Chemistry},
Recently, we demonstrated the mechanocatalytic depolymerization of lignocellulosic substrates as a powerful methodology that fully converts lignocellulosic substrates into ‘water-soluble lignocellulose’. We now show that the saccharification of the aqueous solution of depolymerized beechwood, pinewood and sugarcane bagasse (at 140 °C for 1 h) produces a high yield of sugars (e.g. 88–92% glucose, 3.5–8% glucose dimers and 93–98% xylose relative to the glucan and xylan fractions, respectively… 

Biphasic extraction of mechanocatalytically-depolymerized lignin from water-soluble wood and its catalytic downstream processing

This report demonstrates the saccharification of water-soluble lignocellulose in a biphasic mixture of water and 2-methyltetrahydrofuran, to prevent lignin fragments from recondensation, not only with other lign in fragments but also with oligosaccharides and their degradation products.

Reductive lignocellulose fractionation into soluble lignin-derived phenolic monomers and dimers and processable carbohydrate pulps

A catalytic lignocellulose biorefinery process is presented, valorizing both polysaccharide and lignin components into a handful of chemicals. To that end, birch sawdust is efficiently delignified

An engineered solvent system for sugar production from lignocellulosic biomass using biomass derived γ-valerolactone

γ-Valerolactone (GVL) is a biomass-derived solvent which completely solubilizes all fractions of lignocellulosic biomass, leading to the recovery of polysaccharides (cellulose and hemicellulose) as

Fractionation for further conversion: from raw corn stover to lactic acid

Herein, ethanol/H2O (1/1, v/v) co-solvent with 0.050 M oxalic acid is used to simultaneously fractionate 88.0 wt% of hemicellulose and 89.2 WT% of lignin in corn stover, while cellulose is not obviously degraded.

Influence of bio-based solvents on the catalytic reductive fractionation of birch wood

Reductive catalytic fractionation constitutes a promising approach to separate lignocellulose into a solid carbohydrate pulp and a stable liquid lignin oil. The process is able to extract and convert

Lignin monomer production integrated into the γ-valerolactone sugar platform

We demonstrate an experimental approach for upgrading lignin that has been isolated from corn stover via biomass fractionation using γ-valerolactone (GVL) as a solvent. This GVL-based approach can be

Mechanocatalytic Depolymerization of Lignocellulose Performed on Hectogram and Kilogram Scales

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

The Impact of Salts Formed by the Neutralisation of (Ligno)Cellulose Hydrolysates on the Hydrogenation of Sugars

Dilute acid hydrolysis of lignocellulose often requires a neutralisation step to utilise the hydrolysate's sugars. In this context, very little is known regarding the impact of low levels of acids or

Fractionation of lignocellulosic biopolymers from sugarcane bagasse using formic acid-catalyzed organosolv process

The work represents an alternative process for efficient fractionation of lignocellulosic biomass in biorefineries using formic acid as a promoter with higher efficiency and selectivity on removals of hemicellulose and lignin with increased enzymatic digestibility of the cellulose-enriched solid fraction.



Mechanocatalytic Depolymerization of Dry (Ligno)cellulose As an Entry Process for High-Yield Production of Furfurals

Driven by mechanical forces, the acid-catalyzed depolymerization of solid biomass completely overcomes the problems posed by the recalcitrance of lignocellulose. The solid-state reaction leads to

Solvent-free catalytic depolymerization of cellulose to water-soluble oligosaccharides.

The integrated approach (solid-state depolymerization in combination with liquid-phase hydrolysis) could well hold the key to a highly efficient "entry process" in biorefinery schemes.

Solution-state 2D NMR spectroscopy of plant cell walls enabled by a dimethylsulfoxide-d6/1-ethyl-3-methylimidazolium acetate solvent.

The solvent dimethylsulfoxide (DMSO)-d6 containing 1-ethyl-3-methylimidazolium acetate ([Emim]OAc) was able to dissolve lignocellulosic material completely and gave high-resolution 2D heteronuclear single quantum coherence (HSQC) NMR spectra of the entire array of wall polymers.

Acid hydrolysis of cellulose as the entry point into biorefinery schemes.

This Review focuses on aspects related to the hydrolysis of cellulose as this process is a significant entry point into the biorefinery scheme based on carbohydrates for the production of biofuels and biochemicals.

High-Yielding One-Pot Synthesis of Glucose from Cellulose Using Simple Activated Carbons and Trace Hydrochloric Acid

The ball-milling cellulose and the carbon together created good physical contact between the solid substrate and solid catalyst before the reaction, selectively and drastically improving the depolymerization rate of cellulose to oligomers.

Mechanocatalysis for biomass-derived chemicals and fuels

Heterogeneous catalysis cannot be easily applied to solids such as cellulose. However, by mechanically grinding the correct catalyst and reactant, it is possible to induce solid–solid catalysis or

A route for lignin and bio-oil conversion: dehydroxylation of phenols into arenes by catalytic tandem reactions.

A new procedure for the depolymerization of lignin and simultaneous conversion phenols into arenes is described, which can be rendered as a fundamental finding for the upgrade of bio-oils to arenes under mild conditions.