The co-hydrotreatment of pyrolysis bio-oils and vegetable oils could facilitate the integration of bioderived fuels into existing fuel infrastructures without significant modifications. Co-hydrotreatment studies with different PL/WCO blend ratios (0, 10, 20, 30, and 40 wt %) were conducted over the NiMo/γ-Al₂O₃ catalyst. The coke formation value for WCO was 0.7 wt % and ranged between 1.5 and 2.5 wt % with the increase of pyrolytic lignin in the blend. The data suggest that coke is formed from both the sugar- and lignin-derived oligomers since the coke yield reported in this study is comparable with the coke yield obtained by coprocessing the bio-oil fraction without light oxygenate compounds, based on previous studies. All blends are recommended for co-hydrotreatment based on coke yield. The resulting organic phase was distilled into hydrocarbons at <150 °C, 150 to 250 °C, and 250 to 350 °C. The organic product’s overall hydrocarbon distribution was strongly dependent on the pyrolytic lignin concentration. The yield of the distillation cut with a boiling point range between 250 and 350 °C was higher in the hydrotreated samples, with more than 20% during distillation. Two-dimensional GC×GC was used to determine carbon distribution on the combustibles. FTIR and UV fluorescence spectra showed that most feedstocks were converted to potential combustibles for transportation applications after hydrotreatment. The distillation cuts properties, such as density, viscosity, and surface tension, were reported and compared to transportation fuel properties. Hydrocarbon yields reveal the potential of cohydrotreatment to upgrade pyrolytic lignin into valuable products. These findings provide useful insights into utilizing pyrolytic lignin to produce promising combustibles suitable for transportation applications.

中文翻译：

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热解木质素与废食用油共加氢处理生产碳氢化合物

热解生物油和植物油的共加氢处理可以促进生物衍生燃料整合到现有燃料基础设施中，而无需进行重大修改。在 NiMo/γ-Al ₂ O ₃催化剂上进行了不同 PL/WCO 混合比例（0、10、20、30 和 40 wt%）的共加氢处理研究。 WCO 的焦炭形成值为 0.7 wt%，随着共混物中热解木质素的增加，其范围在 1.5 至 2.5 wt% 之间。数据表明，焦炭是由糖衍生的低聚物和木质素衍生的低聚物形成的，因为本研究报告的焦炭产量与根据先前的研究通过共处理不含轻质含氧化合物的生物油馏分获得的焦炭产量相当。根据焦炭产率，建议所有混合物进行共加氢处理。将所得有机相在<150℃、150至250℃和250至350℃下蒸馏成烃。有机产物的总体碳氢化合物分布强烈依赖于热解木质素浓度。加氢处理样品中沸点范围为 250 至 350 °C 的馏分收率较高，在蒸馏过程中收率超过 20%。采用二维GC×GC测定可燃物上的碳分布。 FTIR 和紫外荧光光谱表明，大多数原料在加氢处理后转化为潜在的可燃物，用于运输应用。报告了蒸馏馏分的性质，例如密度、粘度和表面张力，并与运输燃料性质进行了比较。烃产率揭示了共加氢处理将热解木质素升级为有价值产品的潜力。这些发现为利用热解木质素生产适合运输应用的有前途的可燃物提供了有用的见解。