Organosolv pulping processes are able to generate liquid hemicellulose fractions with a low cellulose and lignin content. Utilization of such streams is promising for production of high-value chemicals. In this study, on the basis of three reaction models, kinetics of an aqueous organosolv hemicellulose and d-xylose conversion into furfural was examined at temperatures between 160 and 200 °C using a continuous tube reactor. Furthermore, furfural degradation was investigated to consider the self-polymerization. Results were compared with previous studies and differences are discussed. Kinetic models showed slight differences for d-xylose conversion and stronger deviations for furfural formation. Overall, model 3, which includes the formation of a xylose intermediate, showed the best performance concerning the experimental results. Differences between d-xylose and organosolv hemicellulose conversion can be attributed mainly to sugar oligomers.

中文翻译：

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有机溶剂半纤维素和d-木糖生产糠醛热液动力学

有机溶剂制浆工艺能够产生具有低纤维素和木质素含量的液体半纤维素级分。利用此类物流有望生产高价值的化学品。在这项研究中，基于三种反应模型，使用连续管式反应器在160至200°C的温度下研究了有机溶剂半纤维素水溶液和d-木糖向糠醛转化的动力学。此外，研究了糠醛降解以考虑自聚合。将结果与以前的研究进行比较，并讨论差异。动力学模型显示d略有差异-木糖转化和糠醛形成的偏差更大。总体而言，模型3（包括木糖中间体的形成）显示出与实验结果相关的最佳性能。d-木糖和有机溶剂半纤维素转化率之间的差异主要归因于糖低聚物。