Ethanolysis of lignite is an effective approach for converting organic matter of lignite to liquid coal derivatives. Xilinguole lignite (XL) was reacted with ethanol at 320 °C. Then ethanol and isometric carbon disulfide/acetone mixture were used to extract the reaction mixture in a modified Soxhlet extractor to afford extractable portion 1 (EP₁) and extractable portion 2 (EP₂), respectively. According to analysis of EP₁ with a gas chromatography/mass spectrometer, phenolic compounds made up more than 33% of the compounds detected. This could be ascribed to the ethanolysis of XL; that is, ethanol could selectively break the C_alkyl–O bonds in lignite, producing more phenolic compounds. Furthermore, a quadrupole Orbitrap mass spectrometer equipped with an atmospheric pressure chemical ionization source was used for comprehensive analysis of the compositional features of EP₁. The analysis indicated that O_1–3, N₁O_0–2, and N₂S₁O_3–6 were predominant class species in EP₁. Nitrogen atoms in NO-containing organic compounds may exist in the form of pyridine or amidogen, while oxygen atoms primarily exist in furan, alkoxy, carbonyl, and ester groups. In addition, possible chemical structures of NO-containing organic compounds were speculated.

中文翻译：

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通过两台质谱仪洞察锡林郭勒褐煤中有机质的组成特征

褐煤的乙醇解是将褐煤有机质转化为液态煤衍生物的有效途径。锡林郭勒褐煤 (XL) 在 320 °C 下与乙醇反应。然后使用乙醇和等量二硫化碳/丙酮混合物在改进的索氏提取器中提取反应混合物以分别提供可提取部分1(EP ₁ )和可提取部分2(EP ₂ )。根据使用气相色谱/质谱仪对 EP _{1的分析，酚类化合物占检测到的化合物的 33% 以上。}这可归因于 XL 的乙醇解；也就是说，乙醇可以选择性地破坏C_烷基褐煤中的-O键，产生更多的酚类化合物。此外，使用配备常压化学电离源的四极杆轨道阱质谱仪对EP ₁的成分特征进行了综合分析。分析表明，O _1–3、N ₁ O _0–2和N ₂ S ₁ O _{3–6是EP 1}中的优势类物种。含NO有机化合物中的氮原子可能以吡啶或氨基的形式存在，而氧原子主要存在于呋喃、烷氧基、羰基和酯基中。此外，还推测了含 NO 有机化合物的可能化学结构。