One-pot deoxygenation of kraft lignin to aromatics and hydrocarbons fuel-range quality is a promising way improve its added value. Since most the commercially resourced lignins are impure (Na, S, K, Ca, etc., present as impurities), effect these impurities on activity catalyst critical was scrutinized in this study using NiMoS/Al2O3 catalyst. The removal from indicated that they obstructed depo...

The second-generation biofuel strategy aims to fully utilize lignocellulose, which is the major component of plant cell wall and most abundant form renewable organic resources. Among three components i.e. cellulose, hemicellulose lignin, lignin has been least utilized one up now. Nevertheless, depolymerization (LD) produce aromatic chemicals fuels intensely explored in recent decade. Alcohols h...

Changes in the physical properties of pulp during recycling are sometimes reported to be caused by changes in chemical properties offibres. In order to determine the relationship, if any, between physical and chemical properties, a chemical characterization was carried out of several recycled pulps. Measurements of carbohydrates, lignin, crystallinity index, and DP of cellulose were carried out...

In the present work, enzymatic/mild acidolysis lignin (EMAL) was isolated from the raw material Cunninghamia lanceolata, and hydrothermal depolymerization was carried out in subcritical water (from 250 to 350 °C) using a cylindrical autoclave. The results revealed that the lowest yield of solid residue and highest liquid product yield were achieved at 325 °C. The liquid products were primarily ...

Due to the highly complex polyphenolic structure of lignin, depolymerization without a prior chemical treatment is challenging, and new catalysts are required. Atomically dispersed able maximize atomic efficiency noble metals, simultaneously providing an alternative strategy tune activity selectivity by alloying with other abundant metal supports. Here, we report active selective catalyst compr...

Lignin depolymerization has been studied for decades to produce carbon-neutral chemicals/biofuels and biopolymers. Among different chemical reaction pathways, catalytic hydrogenolysis favors reactions under relatively mild conditions, while its yield of bio-oil high-value aromatic products is high. In this study, the influence parameters on lignin are discussed by process parameter mapping mode...

The lignin-first biorefinery strategy could produce bio-based phenols from the extraction and depolymerization of native lignin in lignocellulosic biomass. Herein, we report an effective Lewis acid-promoted delignification production monophenolic compounds birch sawdust assisted by microwave heating without external hydrogen for first time. screening different metal triflates revealed that Fe(O...