This work aims to fill gaps in the present knowledge of the structures of wood polysaccharides of potential importance in mechanical and chemical pulping. The detailed structures of the polysaccharide components from wood that dissolve during mechanical pulping were determined. The structures of polysaccharide components linked to residual lignin in chemical pulp were also determined. Methylati...

Although essential to enzymatic hydrolysis of cellulosic biomass to sugars for fermentation to ethanol or other products, enzyme adsorption and its relationship to substrate features has received limited attention, and little data and insight have been developed on cellulase adsorption for promising pretreatment options, with almost no data available to facilitate comparisons. Therefore, adsorp...

BACKGROUND The recalcitrance of lignocellulosic materials is a major limitation for their conversion into fermentable sugars. Lignin depletion in new cultivars or transgenic plants has been identified as a way to diminish this recalcitrance. In this study, we assessed the success of a sugarcane breeding program in selecting sugarcane plants with low lignin content, and report the chemical compo...

Reductive catalytic fractionation (RCF) is a new class of process that produces mono phenolics close-to-theoretical maximum yield by preserving the biomass polysaccharides as solid residues under hydrogen atmosphere or transfer conditions. Herein, hydrous ruthenium oxide deposited on carbon (HRO@C) and HY-zeolite (HRO@HYZ) catalysts are prepared characterized different analytical techniques (TG...

Sugarcane bagasse and straw are generated in large volumes as by-products of agro-industrial production. They are an emerging valuable resource for the generation of hemicellulose-based materials and products, since they contain significant quantities of xylans (often twice as much as in hardwoods). Heteroxylans (yields of ca 20% based on xylose content in sugarcane bagasse and straw) were succ...

Chinese Fir wood (Cunninghamia lanceolata (Lamb.) Hook) was subjected to extraction treatments with sodium chlorite (NaClO2) for delignification, as well as with sodium hydroxide (NaOH) at different concentrations for extraction of hemicelluloses. The wood was examined using a Fourier Transform Infrared (FT-IR) spectrometer and microtension technique to track changes in the chemical and the mic...

Abstract The effect on softwood fiber wall nanostructure of kraft cooking, oxygen delignification and refining was evaluated by X-ray scattering. A recently developed simulation method for modelling small angle scattering (SAXS) data used to estimate the apparent average sizes solids (AAPS) interstitial spaces in (AACS). Fiber saturation point wide were also calculate pore volume crystallite si...

Abstract Charged groups in pulp have been shown to enhance the tensile strength of paper produced from pulp. Oxygen delignification introduces charged and it is interest determine how should be distributed between cooking oxygen stage with respect mechanical properties. A number unbleached kraft cooked delignified pulps within a wide kappa range were refined, effects refining on morphology prop...