| 钟文锐,刘慧利,刘欢,胡建杭.木质素热解生物油组成成分与分子尺寸分布特性分析[J].分子催化,2023,37(2):151-163 |
| 木质素热解生物油组成成分与分子尺寸分布特性分析 |
| Characterization of the Composition and Molecular Size Distribution of Lignin Pyrolysis Bio-oil |
| 投稿时间：2022-11-21 修订日期：2023-01-09 |
| DOI：10.16084/j.issn1001-3555.2023.02.005 |
| 中文关键词: 动力学直径 木质素 择形催化 生物油 |
| 英文关键词:kinetic diameter shape selective catalysis lignin bio-oil |
| 基金项目:云南省应用基础研究计划项目(202101AT070135); 国家自然科学基金(U1602272) |
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| 中文摘要: |
| 选用脱碱木质素作为原料, 以热裂解气质联用技术(Py-GC/MS)研究木质素在350~600 ℃下热解产物成分和含量, 并利用Joback法、 Lijie法和Tahami法3种基团贡献法计算了生物油各组成成分的临界参数和动力学直径, 对木质素热解油产物的分子动力学直径分布特性进行计算. 结果显示, 愈创木基结构、 紫丁香基结构、 苯酚类、 邻苯二酚类和芳烃类等5种芳香族化合物是350~600 ℃下木质素热解生物油的主要组成成分, 其中愈创木基结构化合物的平均峰面积百分比达到70.7%. 随着反应温度从350提高到600 ℃, 分子动力学直径在0.560~ 0.610 nm区间内的木质素热解油组分含量从14.6%增加至31.3%. 木质素热解生物油主要产物的动力学直径在0.560~0.710 nm, 表明一些孔径尺寸在此范围内的分子筛如SSZ-20、 ZSM-5和Beta可作为木质素裂解制备高品质芳烃燃料的催化剂. |
| 英文摘要: |
| The composition and content of lignin pyrolysis bio-oil were analyzed by Pyrolysis-Gas Chromatography/Mass Spectrometry (Py-GC/MS). The critical parameters and kinetic diameters of each constituent of the bio-oil were calculated by Joback method, Lijie method and Tahami method, and the molecular size distribution characteristics of each constituent of the lignin pyrolysis bio-oil were analyzed. The results showed that most of the components of lignin pyrolysis bio-oil were guaiaol-type compounds, syringol-type compounds, phenols, catechols and aromatics in the temperature range from 350 to 600℃. The average peak area percentage of the guaiaol-type compounds reached 70.67%. The kinetic diameter of lignin pyrolysis bio-oil components were mostly distributed at[0.560, 0.710)nm. As the reaction temperature rose from 350 to 600℃, the percentage of peak area of each bio-oil components in the kinetic diameters range of[0.560, 0.610) nm increased from 14.62% to 31.34%. Zeolite catalysts with pore sizes in the range of 0.560 to 0.710 nm, such as SSZ-20, ZSM-5 and Beta, can be used for lignin catalysis pyrolysis to prepare high-quality aromatic fuels. |
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