Separation and purification of hemicellulose-derived saccharides from wood hydrolysate by combined process.
Prehydrolysis of wood biomass prior to kraft cooking provides a stream containing hemicellulose-derived saccharides (HDSs) but also undesired non-saccharide compounds (NSCs) that were resulted from lignin depolymerization and carbohydrate degradation. In this study, a combined process consisting of lime treatment, resin adsorption, and gel filtration was developed to separate HDSs from NSCs. The macro-lignin impurities that accounted for 32.2% of NSCs were removed by lime treatment at 1.2% dosage with negligible HDSs loss. The majority of NSCs, lignin-derived phenolics, were eliminated by mixed bed ion exchange resin, elevating NSCs removal to 94.0%. The remaining NSCs, furfural and hydroxymethylfurfural, were excluded from HDSs by gel filtration. Chemical composition analysis showed that xylooligosaccharides (XOS) with the degree of depolymerization from 2 to 6 accounted for 28% of the total purified HDSs.
['Wang|Xiaojun|X|', 'Zhuang|Jingshun|J|', 'Jiang|Jungang|J|', 'Fu|Yingjuan|Y|', 'Qin|Menghua|M|', 'Wang|Zhaojiang|Z|']
D018533:Biomass D017610:Calcium Compounds D050260:Carbohydrate Metabolism D002241:Carbohydrates D002850:Chromatography, Gel D005662:Furaldehyde D006868:Hydrolysis D007475:Ion Exchange Resins D008031:Lignin D010087:Oxides D011134:Polysaccharides D032107:Populus D014934:Wood
Purification Saccharide Lignin Hemicellulose Hydrolysis