Journal
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
Volume 37, Issue 1, Pages 1-9Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/02773813.2016.1214154
Keywords
Acetic acid; selective acidic hydrolysis; viscose fiber; xylan; xylooligosaccharides
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Funding
- National Natural Science Funding of China [31370573]
- Key Research and Development Program of Jiangsu [BE2015758]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
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Xylooligosaccharides (XOS) were prepared by selective hydrolysis of the waste xylan, obtained from viscose fiber plants, using concentrated acetic acid. The influences of acetic acid concentration, reaction temperature, and reaction time on the yield and component profiles of XOS product were investigated. These results were further ascertained by designing orthogonal experiments. The hydrolysis of xylan residue was selective, since mainly xylooligosaccharide components were formed, with hardly any impure ingredients, except for a small amount of xylose and traces of furfural, in the hydrolyzed product. Reaction temperature was found to be the most significant factor, influencing the XOS yield. Accurate HPAEC-PAD analysis of component profiles indicated that a maximum XOS yield of 45.86% was achieved on hydrolysis of 33.77g/L waste xylan using 20% acetic acid for 20min at 140 degrees C. The main XOS components obtained were xylobiose, xylotriose, and xylotetraose, which were more than xylopentaose and xylohexaose.
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