Leaching of alkali and alkaline earth metallic species (AAEMs) with phenolic substances in bio-oil and its effect on pyrolysis characteristics of moso bamboo
Leaching of alkali and alkaline earth metallic species (AAEMs) with phenolic substances in bio-oil and its effect on pyrolysis characteristics of moso bamboo
复制标题
生物油中酚类物质浸出碱金属和碱土金属物质（AAEM）及其对毛竹热解特性的影响
DOI：
10.1016/j.fuproc.2019.106332
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发表时间：
2020-04
影响因子：
7.5
通讯作者：
Li Ming
中科院分区：
文献类型：
--
作者：
Cen Kehui;Cao Xiaobing;Chen Dengyu;Zhou Jianbin;Chen Fan;Li Ming
存在于生物油中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，因此影响生物质热解。本研究评估了生物油中的酚类物质是否具有类似的效果，用水和两种典型的酚类化合物苯酚和愈创木酚研究了浸提竹子的热解特性。结果表明，酚类物质对AAEM的去除具有重要作用，对K、Mg、Na和Ca的去除率分别为96.4-96.6%、84.6-85.4%、77.2-81.9%和66.7-69.1%。TG-FTIR结果表明，酚类物质的浸提促进了竹材挥发性组分（H2O、CO2、CO、CH 4和含羰基（C=O）组分）的热解释放，提高了热解峰的温度，降低了活化能，同时增加了半纤维素和纤维素热解区的分离。Py-GC/MS分析结果表明，酚类物质的淋溶减少了生物油中酸的生成，但促进了脱水糖的形成，说明酚类物质的淋溶对竹材的热解利用具有积极的作用。
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.
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