oxygen delignified kraft pulp from eucalyptus (e. urophylla × e. grandis) was catalytically pretreated in aerobic condition using ammonium persulfate in present of catalists like cupric acetate and/or cobalt acetate in acetic acid-water solution, i. e. s2o82--cu2+, s2o82--co2+ and s2o82--(cu2++co2+). final bleached pulp after pretreatment with the three catalytic systems showed higher delignifi...

BACKGROUND In recent years, biorefining of lignocellulosic biomass to produce multi-products such as ethanol and other biomaterials has become a dynamic research area. Pretreatment technologies that fractionate sugarcane bagasse are essential for the successful use of this feedstock in ethanol production. In this paper, we investigate modifications in the morphology and chemical composition of ...

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...

This study compared oxidative delignification of birch kraft pulp fibers to from acid hydrotropic fractionation (AHF) using p-toluenesulfonic (p-TsOH). Under oxygen at 20% consistency, AHF pulps with lower hemicellulose content showed higher than similar lignin despite its residual (cellulosic enzymatic lignin, CEL) being less reactive fewer ?-O-4 ether aryl linkages based on 2D13C-1H nuclear m...

Lignin is considered by many as the ultimate barrier that impedes biomass conversion to fuels and chemicals. Several delignification strategies have been developed so far, but alkaline extraction remains most widely used. However, this technology has a high chemical demand, consumes large amounts of water, generates effluents are hard handle. Organosolv pulping good option for such application,...

Abstract Bagasse has the potential to generate alternative energy resources such as bioethanol owing its lignocellulose structure. This research aims for utilizing bagasse raw material producing bioethanol. The process consists of delignification, hydrolysis, fermentation and distillation using biocatalyst namely Fungi Dekkera bruxellensis yeast Saccharomyces cerevisiae . Delignification was co...

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...