中国造纸2012，Vol.31Issue(11)：1-6,6.
热水预水解对松木及其水解液主要化学成分的影响
Effect of Hot Water Prehydrolysis on the Major Components of the Pine and the Hydrolysate
李萍萍 1雷以超 1陈灿 1蒙启骏1
作者信息
- 1. 华南理工大学制浆造纸工程国家重点实验室,广东广州,510640
- 折叠
摘要
Abstract
Using hot water prehydrolysia can effectively separate part of hemicelluloses from the wood in dissolving pulp manufacture process. It will provide possibility for wood biorefinery. In this paper, we studied the effect of hot water prehydrolysis on the dissolving of carbohydrate of the pine and saccharides consistence in the hydrolysate. It was found that the order from fast to slow of saccharides dissolution from the wood was arabinose, galactose, mannose, xylose and glucose. During prehydrolysis, the carbohydrates were degraded. Only part of degraded hemicelluloses was removed and dissolved into hydrolysate, most of hemicelluloses would be removed in the subsequent cooking and bleaching processes. At a prehydrolysis temperature of 180℃ , the saccharides consistence in the hydrolysate decreased quickly with hydrolysis time, the furfural and hydroxymethylfurfural consistence increased quickly with hydrolysis time, it was unfavorable to hydrolysate fermentation for ethanol production. At last, the effects of 170t hot water prehydrolysis on the major constituents of the pine such as pentosan, extractive of benzene-alcohol, holocellulose, lignin and ash were investigated. The results showed that pentosan and ash contents decreased with increasing prehydrolysis time; while the extractive content of benzene-alcohol increased with increasing prehydrolysis time; the holocellulose content decreased rapidly in the first, 90 minutes of prehydrolysis, it almost kept constant afterword; the lignin content decreased first and then increased slightly later.关键词
热水预水解/松木/化学成分/半纤维素Key words
hot water prehydrolysis/ pine/ chemical constituent/ hemicelluloses分类
轻工纺织引用本文复制引用
李萍萍,雷以超,陈灿,蒙启骏..热水预水解对松木及其水解液主要化学成分的影响[J].中国造纸,2012,31(11):1-6,6.
