Influence of Alkali and Alkaline Earth Metallic Species on the Phenolic Species of Pyrolysis Oil
Influence of Alkali and Alkaline Earth Metallic Species on the Phenolic Species of Pyrolysis Oil
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DOI：
10.15376/biores.12.1.1611-1623
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发表时间：
2017-01
期刊：
影响因子：
1.5
通讯作者：
Liu Ziyun;Lihong Wang;B. Jenkins;Yongjun Li;Weiming Yi;Zhihe Li
中科院分区：
文献类型：
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作者：
Liu Ziyun;Lihong Wang;B. Jenkins;Yongjun Li;Weiming Yi;Zhihe Li
生物油是一种重要的可再生能源产品，以玉米秸秆和木质素为原料，通过快速热解制得生物油。研究了碱和碱土金属物质（AAEMs）对玉米秸秆和木质素热解油中酚类产物的影响。玉米秸秆用0.5 M HCl脱矿，木质素分别掺杂0.2wt%、2wt%和20wt%的KCl和CaCl2。热解实验在450 ~ 600℃的固定床管式炉中进行。研究发现，aaem对炭和气的形成有积极作用，对生物油的生成有抑制作用。KCl对木质素产物分布的影响强于CaCl2。去除aaem后，P、HP、GP和SP的含量降低。600℃时，KCl能促进轻分子芳烃的聚合，提高SP收率，而对P和HP含量的提高作用相对弱于CaCl2。KCl和CaCl2在去甲基化和去甲氧基化反应中具有显著的提高酚含量和去除环上R基团的作用。
Bio-oil as an important renewable energy product has been successfully made from corn stalks and lignin via a fast pyrolysis process. This study investigated the effects of alkali and alkaline earth metallic species (AAEMs) on phenolic products in corn stalk and lignin pyrolysis oil. Corn stalks were demineralized with 0.5 M HCl, and lignin was doped with 0.2wt%, 2wt%, and 20wt% KCl and CaCl2, respectively. The pyrolysis experiments were conducted in a fixed bed tubular furnace ranging from 450 °C to 600 °C. It was found that AAEMs exert positive effects on the formation of char and gas and inhibit the production of bio-oil. The effect of KCl on the product distribution from lignin is somewhat stronger than CaCl2. Moreover, the content of P, HP, GP, and SP decreases after removal of AAEMs. KCl can promote the polymerization of light molecular aromatic hydrocarbons to increase the SP yield at 600 °C, whereas the effect on increase in P and HP content is relatively weaker than CaCl2. KCl and CaCl2 play notable roles in demethxylation and demethoxylation in increasing phenol content and removing the R group from the ring.