Institute of Thermal Separation Processes, Hamburg University of Technology, Eissendorfer Strasse 38, 21073 Hamburg, Germany.
Bioresour Technol. 2012 Nov;123:592-8. doi: 10.1016/j.biortech.2012.07.031. Epub 2012 Jul 20.
This work explores hydrothermal d-xylose and hemicellulose to furfural conversion coupled with simultaneous furfural extraction by SC-CO(2) and the underlying reaction pathway. A maximum furfural yield of 68% was attained from d-xylose at 230°C and 12MPa. Additionally missing kinetic data for l-arabinose to furfural conversion was provided, showing close similarity to d-xylose. Furfural yields from straw and brewery waste hydrolysates were significantly lower than those obtained from model compounds, indicating side reactions with other hydrolysate components. Simultaneous furfural extraction by SC-CO(2) significantly increased extraction yield in all cases. The results indicate that furfural reacts with intermediates of pentose dehydration. The proposed processing route can be well integrated into existing lignocellulose biorefinery concepts.
本工作研究了水热 d-木糖和半纤维素到糠醛的转化，并通过 SC-CO(2) 同时进行糠醛萃取，以及潜在的反应途径。在 230°C 和 12MPa 的条件下，d-木糖的最大糠醛收率为 68%。此外，还提供了 l-阿拉伯糖到糠醛转化的缺失动力学数据，表明与 d-木糖非常相似。来自秸秆和啤酒厂废物水解物的糠醛收率明显低于模型化合物的收率，表明与其他水解物成分发生了副反应。SC-CO(2) 的同时萃取显著提高了所有情况下的萃取收率。结果表明，糠醛与戊糖脱水的中间产物反应。所提出的加工路线可以很好地集成到现有的木质纤维素生物炼制概念中。
