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Insight into the Compositional Features of Organic Matter in Xilinguole Lignite through Two Mass Spectrometers

[Image: see text] 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...

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Detalles Bibliográficos
Autores principales: Li, Sheng, Du, Fen-Fen, Ma, Zhi-Hao, Zhang, Li-Hong, Liu, Zhong-Qiu, Zhao, Tian-Sheng, Wei, Xian-Yong, Xu, Mei-Ling, Cong, Xing-shun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9773933/
https://www.ncbi.nlm.nih.gov/pubmed/36570262
http://dx.doi.org/10.1021/acsomega.2c05051
Descripción
Sumario:[Image: see text] 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 (EP(1)) and extractable portion 2 (EP(2)), respectively. According to analysis of EP(1) 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 EP(1). The analysis indicated that O(1–3), N(1)O(0–2), and N(2)S(1)O(3–6) were predominant class species in EP(1). 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.