生物炼制
木聚糖
木糖
萃取(化学)
单糖
化学
半纤维素
热液循环
多糖
生物量(生态学)
色谱法
核化学
化学工程
水解
食品科学
原材料
有机化学
发酵
农学
生物
工程类
作者
Yuan Yuan,Ping Zou,Jinhui Zhou,Yuting Geng,Jiajun Fan,James H. Clark,Yiqiang Li,Chengsheng Zhang
标识
DOI:10.1016/j.carbpol.2019.115043
摘要
Microwave-assisted hydrothermal extraction of non-structural carbohydrates and hemicelluloses from tobacco biomass was investigated. Non-structural carbohydrates extraction was optimized by an Optimal design. The maximum yields for the leaf and stem were 118.57 mg/g and 120.33 mg/g biomass, respectively. The extracted stem residue was further treated for hemicelluloses extraction. A temperature of 200 °C without holding was proved to be the most efficient condition to produce a hemicelluloses yield of 105.15 mg/g. GPC results showed that the Mw values of precipitated hemicelluloses decreased from 143.5 kDa to 13.25 kDa with increasing temperature and holding time, while the un-precipitated fraction were ranging from 11.83 to 4.88 kDa. Monosaccharide analysis revealed that hemicelluloses extracted at lower temperature are heterogeneous compositional type, including xylan, glucuronoxylan and xylanglucan, while the ratio of xylose increased significantly (up to 72.64%) with increasing temperature. The developed microwave-assisted hydrothermal extraction process opens new avenues for a sustainable tobacco-based biorefinery.
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