The conventional production of platform compounds from biomass suffers from low yield, long residence time, and waste of cellulose and lignin components. To achieve the separation of three components in sugarcane bagasse with a high yield of furfural (FF), this study investigated various factors such as reaction temperature and time, pressure, acid concentration within the pressurized phosphoric acid/acetone/water (PPAWS) system. The results indicated that under the optimized conditions of external pressure (1.5 Mpa N), solid/liquid ratio (1:52.8 g ml), acid concentration (8.3 wt% HPO) and dose of metal chloride salt (25 % AlCl), a high yield (72.7 %) of FF and high content of cellulose (92.63 %) in the hydrolysis residue were obtained in only 5 min. The lignin was retained in the hydrolysate and its content in the hydrolysis residue was only 4.4 %, with a removal rate of 93.4 %. The interaction experiments demonstrated the synergistic effect among these factors. Furthermore, this study pioneered the online visualization of catalytic hydrolysis of sugarcane bagasse using a high-pressure differential scanning calorimeter to monitor heat absorption and exothermic reactions. It implied that the acetone present emerged as a solvent that promoted FF production by inhibiting the condensation reactions under high pressure.

中文翻译：

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使用加压磷酸/丙酮/水系统将甘蔗渣一锅催化水解成糠醛


利用生物质生产平台化合物的传统方法存在产量低、停留时间长以及纤维素和木质素成分浪费的问题。为了实现甘蔗渣中三种组分的分离并高产率地获得糠醛（FF），本研究研究了加压磷酸/丙酮/水（PPAWS）系统中的反应温度和时间、压力、酸浓度等各种因素。结果表明，在外压（1.5 Mpa N）、固液比（1:52.8 g ml）、酸浓度（8.3 wt% HPO）和金属氯化盐用量（25% AlCl）的优化条件下，仅需 5 分钟即可获得高 FF 产率（72.7%）和水解残渣中高含量纤维素（92.63%）。木质素保留在水解液中，水解残渣中木质素含量仅为4.4%，去除率为93.4%。相互作用实验证明了这些因素之间的协同效应。此外，这项研究开创了甘蔗渣催化水解的在线可视化，使用高压差示扫描量热计监测吸热和放热反应。这意味着丙酮作为溶剂出现，通过抑制高压下的缩合反应来促进 FF 的生产。