1. Separation and purification of hemicellulose-derived saccharides from wood hydrolysate by combined process.
- Author
-
Wang X, Zhuang J, Jiang J, Fu Y, Qin M, and Wang Z
- Subjects
- Biomass, Calcium Compounds chemistry, Carbohydrate Metabolism, Furaldehyde analogs & derivatives, Furaldehyde isolation & purification, Hydrolysis, Ion Exchange Resins, Lignin chemistry, Lignin metabolism, Oxides chemistry, Populus chemistry, Carbohydrates isolation & purification, Chromatography, Gel methods, Polysaccharides chemistry, Wood chemistry
- Abstract
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., (Copyright © 2015 Elsevier Ltd. All rights reserved.) more...
- Published
- 2015
- Full Text
- View/download PDF