Kraft lignin was rapidly depolymerised in a continuous reactor using sub- and supercritical water. The reaction yielded an aromatic oil rich in high value aromatic monomers such as guaiacol, vanillin, acetovanillone and homovanillic acid. Different temperatures between 300 and 400 °C and reaction times from 60 ms were studied. An increment in reaction time at every temperature studied promoted secondary reactions of repolymerisation of the lignin products. Those undesired reactions were more relevant as temperature increased. An optimal temperature of 386 °C at a reaction time of 170 ms was found, with a maximum yield in phenolic compounds obtained. At those conditions, a bio-oil containing low molecular weight compounds was obtained with a yield of 44.6 %. A selectivity to the four cited monomers of 9.9 % was achieved, with little formation of solid residue (3.5 %). A simple kinetic model was proposed to describe the yield for the different fractions and fitted to experimental data.

在连续反应器中使用亚临界水和超临界水将牛皮纸木质素快速解聚。该反应产生了富含高价值芳族单体如愈创木酚，香兰素，乙酰香草醛和高香草酸的芳族油。研究了300至400°C的不同温度和60 ms的反应时间。在所研究的每个温度下反应时间的增加促进了木质素产物的再聚合的次级反应。随着温度升高，那些不希望的反应更加相关。发现最佳反应温度为386°C，反应时间为170 ms，所获得的酚类化合物的收率最高。在这些条件下，以44.6％的产率获得了包含低分子量化合物的生物油。对四种被引用的单体的选择性达到9.9％，几乎没有形成固体残留物（3.5％）。提出了一个简单的动力学模型来描述不同馏分的收率并拟合实验数据。