Production Behavior of Xylose and Xylooligosaccharides from Chinquapin Using a Hot-compressed-water Treatment

Abstract

Chinquapin powder was treated with hot-compressed-water (HCW) at the temperature ranges of 170-210°C using a batch type reactor. A part of the components in Chinquapin was converted to water-solubles. The water-solubles formed by hydrolysis with the HCW mainly consisted of xylose and xylooligosaccharides derived from hemicellulose (xylan), and the water-insoluble residues mainly consisted of cellulose and insoluble-lignin (a part of lignin was converted to water-solubles) . The maximum xylose yield was about 40 wt% (dry hemicellulose base) and xylobiose yield was 11 wt% (hemicellulose base) under all reaction temperature conditions. The obtained water-soluble saccharides can be used as various chemicals, functional foods, sweeteners and so on.