Pyrolysis behavior and product distribution of exinite submacerals
Pyrolysis behavior and product distribution of exinite submacerals
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外质亚显微体的热解行为和产物分布
DOI：
10.1016/j.jaap.2020.104957
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发表时间：
2020-11
影响因子：
6
通讯作者：
Cai Yuchu
中科院分区：
文献类型：
--
作者：
Liu Lei;Du Meili;Li Gang;Fan Jinwen;Cai Yuchu
本文利用热重分析仪结合傅里叶变换红外光谱仪（TG-FTIR）和热解仪结合气相色谱/质谱仪（Py-GC/MS）系统研究了从不同低阶煤中分离的外质亚显微质的热解行为和产物分布。同时通过FTIR研究了外质亚显微层中的官能团。结果表明，所有亚显微物质的芳香族含量较低，具有丰富的脂肪链和更多的含氧官能团。此外，随着加热速率的增加，TG 曲线横向向更高温度移动。动力学参数(E和A)表明，计算得到的树脂体活化能和频率因子最大，树皮体接近角质体，而孢子体最小。测量热解过程中CO2、CH4、H2O和CO的释放量。这些挥发性物质的温度区间和含量反映了不同显微物质热解机制和官能团含量的差异。根据Py-GC/MS快速热解（650℃），挥发性物质可分为烷烃、烯烃、环烷烃、芳烃、醇类、酚类、杂原子化合物和酮类8类。亚显微质的热解行为和产物分布与其特殊母质的化学结构密切相关。外质亚显微质中不同化学结构对温度的敏感性导致了不同的热解行为和产物分布趋势。
This paper systematically investigated the pyrolysis behavior and product distributions of exinite submacerals .isolated from different low-rank coal using thermogravimetric analyzer coupled with Fourier Transform infrared .spectroscopy (TG-FTIR) and Pyrolyzer coupled with gas chromatography/mass spectrometry (Py-GC/MS). The .functional groups in exinite submacerals were studied by FTIR simultaneously. Results suggested that all submacerals were less aromatic with abundant aliphatic chains and more oxygen-containing functional groups. .Besides, the TG profiles lateral shifted towards higher temperatures with the heating rates. The kinetic parameters (E and A) indicated that the calculated activation energy and frequency factor of the resinite were the .largest, and the barkinite was close to cutinite, while the sporinite was the smallest. The release of CO2, CH4, H2O .and CO were measured during pyrolysis process. The temperature intervals and contents for these volatile species .reflected the difference in pyrolysis mechanism and the contents of functional groups for different submaceral. .According to the fast pyrolysis (650 ℃) by Py-GC/MS, the volatile species could be classified into eight categories .including alkanes, alkenes, cycloalkanes, arenes, alcohols, phenols, heteroatomic compounds and ketones. The .pyrolysis behavior and product distributions of submacerals were closely related to the chemical structure of its .special parent material. The sensitivity of different chemical structures in exinite submacerals to temperature .achieved different trends of pyrolysis behavior and product distribution.
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影响因子：
6
作者：
H. Yoshioka;N. Takeda
通讯作者：
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影响因子：
7.2
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影响因子：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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