In this work, cattle manure and corn cob were investigated by co-hydrothermal liquefaction and the synergetic effect were analyzed. The co-hydrothermal liquefaction of cattle manure and corn cob could improve the yields of biocrude and water soluble organic matter (WSOM), but inhibit the formation of solid products. When the cattle manure content was 40 %, synergistic coefficients reached the maximum of 4.7 % for biocrude at 360 °C and 49.6 % for WSOM at 340 °C, respectively. The biocrude from co-liquefaction had lower oxygen and nitrogen contents and higher HHVs than expected. It was because the co-liquefaction could enhance the generation of phenols in biocrude and promote the migration of N into WSOM by forming 3-pyridinol, which were beneficial to increase the quality of biocrude. According to PCA analysis, most cyclopentenones showed strong correlation with N-heterocycles. In addition, with the gradual decrease of the number of substituents on the benzene ring, the correlation between aromatic compounds and protein products gradually increased, suggesting that protein content helps to promote further decomposition reactions of lignin products in co-hydrothermal liquefaction. Base on the pathway changes of cattle manure and corn cob in co-hydrothermal liquefaction, a predicted synergistic reaction network was proposed.

中文翻译：

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基于主成分分析的牛粪与玉米芯共水热液化协同效应及反应路径研究


本工作以牛粪和玉米芯共水热液化为研究对象，并分析了协同效应。牛粪和玉米芯共水热液化可以提高生物原油和水溶性有机物（WSOM）的产率，但抑制固体产物的形成。当牛粪含量为40%时，360℃下生物原油的协同系数达到最大值4.7%，340℃下WSOM的协同系数达到最大值49.6%。共液化生物原油的氧和氮含量低于预期，而 HHV 高于预期。这是因为共液化可以增强生物原油中酚类物质的生成，并促进N向WSOM中迁移形成3-吡啶醇，有利于提高生物原油的质量。根据PCA分析，大多数环戊烯酮与N-杂环具有很强的相关性。此外，随着苯环上取代基数量的逐渐减少，芳香族化合物与蛋白质产物的相关性逐渐增强，表明蛋白质含量有助于促进共水热液化中木质素产物的进一步分解反应。根据牛粪和玉米芯共水热液化的路径变化，提出了预测的协同反应网络。