Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China.
Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China.
Bioresour Technol. 2015 Apr;182:364-367. doi: 10.1016/j.biortech.2015.01.032. Epub 2015 Feb 7.
The objective of this study was to get fermentable sugars by dilute acid hydrolysis of hemicellulose and fast pyrolysis of cellulose from sugarcane bagasse. Hemicellulose could be easily hydrolyzed by dilute acid as sugars. The remained solid residue of acid hydrolysis was utilized to get levoglucosan by fast pyrolysis economically. Levoglucosan yield from crystalline cellulose could be as high as 61.47%. Dilute acid hydrolysis was also a promising pretreatment for levoglucosan production from lignocellulose. The dilute acid pretreated sugarcane bagasse resulted in higher levoglucosan yield (40.50%) in fast pyrolysis by micropyrolyzer, which was more effective than water washed (29.10%) and un-pretreated (12.84%). It was mainly ascribed to the effective removal of alkali and alkaline earth metals and the accumulation of crystalline cellulose. This strategy seems a promising route to achieve inexpensive fermentable sugars from lignocellulose for biorefinery.
本研究旨在通过稀酸水解蔗渣中的半纤维素和快速热解纤维素获得可发酵糖。稀酸可使半纤维素轻易水解为糖。酸水解的剩余固体残渣可通过快速热解经济地得到左旋葡聚糖。结晶纤维素的左旋葡聚糖产率高达 61.47%。稀酸水解也是从木质纤维素生产左旋葡聚糖的一种很有前途的预处理方法。稀酸预处理蔗渣后，在微热解器中进行快速热解，左旋葡聚糖的产率更高（40.50%），比水洗（29.10%）和未预处理（12.84%）更有效。这主要归因于有效去除了碱金属和碱土金属，并积累了结晶纤维素。这种策略似乎是一种很有前途的途径，可以从木质纤维素为生物炼制厂获得廉价的可发酵糖。
