Abstract Acids present in bio-oil are considered to be effective agents to remove alkali and alkaline earth metallic species (AAEMs) from biomass, therefore affecting biomass pyrolysis. This study assessed whether phenols in bio-oil have a similar effect, with the pyrolysis characteristics of leached bamboo investigated using water and two typical phenolic compounds, phenol and guaiacol. Results confirmed that phenols have an important role in the removal of AAEMs, removing 96.4–96.6% of K, 84.6–85.4% of Mg, 77.2–81.9% of Na, and 66.7–69.1% of Ca. TG-FTIR results showed that phenolic leaching enhanced the pyrolytic release of volatile components of bamboo (H2O, CO2, CO, CH4, and carbonyl (C=O)-containing components), increased the temperature of pyrolysis peaks and decreased the activation energy, while increasing separation of the hemicellulose and cellulose pyrolysis zone. The results of Py-GC/MS showed that phenolic leaching reduced the production of acids but promoted the formation of anhydrosugars in bio-oil, indicating that phenolic leaching of AAEMs has a positive effect on the pyrolysis utilization of bamboo.

中文翻译：

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生物油中酚类物质对碱金属和碱土金属物种（AAEMs）的浸出及其对毛竹热解特性的影响

摘要 生物油中存在的酸被认为是从生物质中去除碱金属和碱土金属物种 (AAEM) 的有效试剂，因此会影响生物质热解。本研究评估了生物油中的酚类是否具有类似的作用，并使用水和两种典型的酚类化合物苯酚和愈创木酚研究浸出竹的热解特性。结果证实，苯酚在去除 AAEM 中具有重要作用，去除 96.4-96.6% 的 K、84.6-85.4% 的 Mg、77.2-81.9% 的 Na 和 66.7-69.1% 的 Ca。TG-FTIR 结果表明，酚类浸出增强了竹子挥发性成分（H2O、CO2、CO、CH4 和含羰基 (C=O) 的成分）的热解释放，提高了热解峰的温度并降低了活化能，同时增加半纤维素和纤维素热解区的分离。Py-GC/MS结果表明，酚浸出降低了酸的产生，但促进了生物油中脱水糖的形成，表明AAEM的酚浸出对竹子的热解利用具有积极影响。