Eucalyptus globulus wood samples were subjected to hydrothermal processing according to a three-stage, crossflow scheme with intercalated washing stages. The operational conditions for each hydrothermal stage were selected based on previous experiments, as the kinetics and yields depended on the composition of the reaction media. The solid recovery yields as well as the compositions of the various solids and liquids involved in each stage were measured, in order to allow the formulation of material balances. Under the conditions selected, the various stages enabled solid recovery yields in the range 70.8–74.4 g/100 g oven-dry wood, with extensive hemicellulose removal and almost quantitative recovery of both cellulose and lignin in solid phase. The production of valuable polysaccharide-derived products (including saccharides and furans) along the process decreased owing to the different initial composition of the various reaction media. In turn, the generation of monosaccharides from soluble saccharides of oligomeric or polymeric nature was promoted in the second and third stages. The experimental data provided in this study allow a quantitative assessment on the considered process, a basic information for simulation and economic evaluation.

中文翻译：

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Eucalyptus Globulus 木材的多阶段水热加工：实验评估

根据具有插入洗涤阶段的三级错流方案，对蓝桉木材样品进行水热处理。每个水热阶段的操作条件是根据之前的实验选择的，因为动力学和产率取决于反应介质的组成。测量固体回收率以及每个阶段涉及的各种固体和液体的组成，以便制定物料平衡。在选定的条件下，各个阶段的固体回收率在 70.8–74.4 g/100 g 烘干木材范围内，具有广泛的半纤维素去除率和固相中纤维素和木质素的几乎定量回收率。由于各种反应介质的初始组成不同，在此过程中有价值的多糖衍生产品（包括糖类和呋喃）的产量下降。反过来，在第二和第三阶段促进了从低聚或聚合性质的可溶性糖类中产生单糖。本研究中提供的实验数据允许对所考虑的过程进行定量评估，这是模拟和经济评估的基本信息。