Abstract：
This work proposes the pyrolysis of the cassava plant shoot system biomass and a comprehensive chemical characterization of the resulting bio-oil. The highest yields of liquid products were obtained at 600 °C, with 12.6 % bio-oil (organic fraction), which presented the lowest total acid number of 65.7 mg KOH g-1. The bio-oil produced at 500 °C exhibited the highest total phenolic content of approximately 41 % GAE, confirmed by GC/MS analysis (33.8 % of the total area). FT-Orbitrap MS analysis found hundreds of oxygenated constituents in the bio-oils, belonging to the O2-7 classes, as well as nitrogen compounds from the Ny and OxNy classes. Higher pyrolysis temperatures resulted in more oxygenated phenolics (O4-7) undergoing secondary degradation and deoxygenation reactions, generating O2-3 compounds. Additional classes affected were O3-5N2-3, while O1-2N1 presented more stable compounds. These findings show that cassava bio-oils are promising sources of renewable chemicals.
摘要：
这项工作提出了木薯植物芽系统生物质的热解以及所得生物油的全面化学表征。在600°C下获得了最高的液体产物收率，含有12.6%的生物油（有机馏分），最低的总酸值为65.7mgKOHg-1。在500°C下生产的生物油表现出最高的总酚含量，约为41％GAE，经GC/MS分析证实（占总面积的33.8％）。FT-OrbitrapMS分析发现生物油中有数百种含氧成分，属于O2-7类，以及Ny和OxNy类的氮化合物。较高的热解温度导致更多的氧化酚类（O4-7）经历二次降解和脱氧反应，生成O2-3化合物。受影响的其他类别是O3-5N2-3，而O1-2N1则表现出更稳定的化合物。这些发现表明木薯生物油是可再生化学物质的有希望的来源。
