Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, China.
Bioresour Technol. 2012 Jul;116:220-5. doi: 10.1016/j.biortech.2012.04.031. Epub 2012 Apr 21.
The chemical composition, hydrolysis products, and kinetics during liquid hot water pretreatment of sweet sorghum bagasse (SSB) and eucalyptus wood chips (EWC) were investigated. Under optimal conditions, a total xylose recovery of 79.6% and 55.6% for SSB and of 74.9% and 84.4% for EWC was achieved after pretreatments in a step-change flow rate reactor (184 °C, 20 ml/min, 8 min, and 10 ml/min, 10 min) and batch stirred reactor (184 °C, 5%w/v, 18 min), respectively. More than 90% of the xylose was recovered as oligomers from SSB, independent of the type of reactor employed. The activation energies of xylan decomposition of SSB in the step-change flow rate reactor was 6.5-fold greater than that of EWC in the batch stirred reactor due to accumulation of acidic products. These findings show that sugar recovery is dependent on the reactor configuration for specific substrates.
采用分步变流速反应器（184°C，20ml/min，8min 和 10ml/min，10min）和间歇搅拌式反应器（184°C，5%w/v，18min）对甜高粱渣（SSB）和桉木木屑（EWC）进行了液体热预处理，考察了其化学成分、水解产物及动力学特性。在最佳条件下，两种反应器预处理后 SSB 的总木糖得率分别为 79.6%和 55.6%，EWC 的总木糖得率分别为 74.9%和 84.4%。SSB 无论采用哪种反应器，木糖均有 90%以上以低聚物形式回收，这与所采用的反应器类型无关。由于酸性产物的积累，SSB 在分步变流速反应器中木聚糖的分解活化能比 EWC 在间歇搅拌式反应器中高 6.5 倍。这些发现表明，对于特定底物，糖的回收取决于反应器的结构。
