To study the catalytic depolymerization process of alkali lignin by organic bound sodium in supercritical ethanol, the solid chars and liquid oils products were first prepared by using a high pressure autoclave at different temperatures and times. The properties of solid chars then were analyzed by elemental analysis, FT-IR, and SEM, and the composition of liquid oils was characterized by GC–MS. FT-IR and SEM results showed that the depolymerization process of alkali lignin catalyzed by organic bound sodium in sub- and supercritical ethanol formed different micrometer-sized spheres products, and the sphere size of the char products was obviously affected by the depolymerized temperature. The C/O and C/H ratios of the chars products also increased with depolymerized temperature increasing. GC–MS results indicated that the components of liquid oils obtained from sub- and supercritical ethanol mainly were ester and phenolic compounds, respectively.

中文翻译：

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超临界乙醇中有机结合钠对碱木质素的自催化解聚

为了研究有机木质素在超临界乙醇中碱木质素的催化解聚反应，首先通过在不同温度和时间使用高压釜制备了固体炭和液体油产品。然后通过元素分析，FT-IR和SEM分析固体炭的性质，并通过GC-MS对液体油的成分进行表征。FT-IR和SEM结果表明，亚临界和超临界乙醇中有机键合钠催化的碱木质素解聚过程形成了不同的微米级球状产物，而焦炭产物的球状度明显受解聚温度的影响。随着解聚温度的升高，焦炭产物的C / O和C / H比也增加。