Degradation and dissolution of hemicelluloses during bamboo hydrothermal pretreatment.
To elucidate the hemicelluloses degradation and dissolution during hydrothermal pretreatment, hemicelluloses separated from both hydrolysate and pretreated substrate were investigated. Along with the pretreatment proceeding, some hemicelluloses fractions dissolved and diffused into the bulk liquor; MW (molecular weight) of these hemicelluloses fractions increased first and then decreased as well as amount of the fractions. Based on the definition of MW of the soluble hemicellulose, it has been concluded that some insoluble hemicellulose fractions appeared in the hydrolysate. In contrast, the hemicellulose degradation occurred continually and had been observed by the gradual decrease of MW of the hemicellulose isolated from pretreated substrate. Lingering dissolution at the later stage might attribute to the facts that some soluble fractions were still entrapped in the substrate. 5-15% hemicellulose fractions remained in the pretreated substrate at the later stage were composed of soluble species.
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
X J
XJ
Ma
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
X F
XF
Yang
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
X
X
Zheng
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
L
L
Lin
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
L H
LH
Chen
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
L L
LL
Huang
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: scutcsl@163.com.
S L
SL
Cao
D056804:Biofuels; D006358:Hot Temperature; D006868:Hydrolysis; D008970:Molecular Weight; D006109:Poaceae / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry*
D056804:Biofuels; D011134:Polysaccharides; C007916:hemicellulose
Bamboo; Hemicelluloses; Hydrothermal pretreatment; MW