SPORL (Sulfite Pretreatment to Overcome Recalcitrance of Lignocellulose) has been demonstrated as an effective and robust pretreatment technology for ethanol production from lignocellulosic biomass, in particular woody biomass. The process consists of a short chemical treatment of feedstock with sulfite followed by mechanical size reduction (fiberization) with disk mill. Studies indicated that ...

Lignin is a raw material that can potentially be converted into valuable compounds through depolymerization reactions in addition to its use as polymer or material. However, the chemical recalcitrance and heterogeneous composition structure of lignin make it challenging establish processes add value this complex aromatic biopolymer. In work, solvent fractionation was applied obtain fractions wi...

Abstract: The catalytic hydrogenation of lignin-derived monophenols with high efficiency and selectivity is important for the sustainable production of chemicals and fuels. Here, Pd/γ-Al2O3 was prepared via impregnation and used as catalyst for the hydrogenation of phenols to cyclohexanols under mild conditions in aqueous solution. 3 wt. % Pd/γ-Al2O3 exhibited good catalytic activity for the se...

Passivation of naturally occurring AAEM in biomass enhances sugar yields from the fast pyrolysis by preventing these metals catalyzing fragmentation pyranose rings cellulose and hemicellulose. However, because also catalyzes lignin depolymerization, its passivation can be accompanied undesirable char agglomeration. Pretreatment with ferrous sulfate both passivates substitutes ions as depolymeri...

To utilize its rich aromatics, lignin, a high-volume waste and environmental hazard, was depolymerized in supercritical ethanol over various zeolites types with different acidity pore structures. Targeting at high yield/selectivity of aromatics such as phenols, microporous Beta, Y, ZSM-5 were first examined lignin ethanolysis, followed by similar micropore size but acidity. Further comparisons ...

Catalytic hydroconversion of Kraft and hydrolysis lignins was for the first time compared in a batch reactor over an unsupported NiMoS-SBA catalyst. We also report effect key reaction parameters on yields properties products. The results obtained at 20 wt% catalyst loading lignin showed highest monomer yield 76.0 wt%, which consisted 39 aromatics with lowest alkylphenolics 10.1 wt%. Identical o...

Catalytic hydrogenolysis in the medium of supercritical organic solvents is a promising way wood lignins depolymerization into liquid products. In this study, for first time, catalytic properties bifunctional catalysts Ru/C, Pt/ZrO2, NiCuMo/SiO2, containing nanosized metal particles on acidic groups are compared processes aspen and ethanol lignin ethanol. The most active Ru/C Pt/ZrO2 which prov...

Lignin is a potential renewable raw material for synthesis of aromatic molecules and materials. Particularly, Kraft-type lignins are abundantly available as byproduct wood paper industries. Currently, there practically no valuable products made using this highly complex polymer. Within work, we have investigated the straightforward, high-yield depolymerization two different technical (Indulin A...