Cornstalk cellulose was liquefied in supercritical acetone at various temperature by a high-pressure autoclave, where the maximum yield of bio-oil was 43.79% and the highest conversion rate of cellulose was 72.13%. FT-TR spectrums showed that the C–O–C and C–C bonds in cellulose were cleaved under the attack of supercritical acetone, then active fragments were produced and transformed into liquefaction products. GC-MS results showed that the dominant components in bio-oil were ketones, esters, alkanes, etc. As the acetone dosage increased, ketones and glucosides increased while esters and alkanes decreased. A higher temperature was suitable for ketones and esters formation, which had an inhibition on alkanes formation. Finally, the formation of pathways and networks of dominant chemicals during cellulose liquefaction in supercritical acetone were developed. This investigation contributes to the knowledge of cellulose liquefaction in supercritical solvents for bio-oil and platform chemicals, which can provide an alternative method for biomass resources utility.

玉米秸秆纤维素通过高压釜在不同温度下在超临界丙酮中液化，其中生物油的最大产率为43.79％，纤维素的最高转化率为72.13％。FT-TR光谱表明，纤维素中的C–OC和C–C键在超临界丙酮的作用下被裂解，然后产生了活性片段，并转化为液化产物。GC-MS结果表明，生物油中的主要成分是酮，酯，烷烃等。随着丙酮用量的增加，酮和糖苷的含量增加，而酯和烷烃的含量降低。较高的温度适合于酮和酯的形成，这对烷烃的形成具有抑制作用。最后，研究了纤维素在超临界丙酮液化过程中主要化学物质的通路和网络的形成。这项研究有助于了解纤维素在生物油和平台化学品的超临界溶剂中的液化能力，这可以为生物质资源的利用提供一种替代方法。