{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:59:01Z","timestamp":1787029141557,"version":"build-2736575974"},"reference-count":30,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2024,6,11]],"date-time":"2024-06-11T00:00:00Z","timestamp":1718064000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Xinjiang Uyghur Autonomous Region","award":["2022E01057"],"award-info":[{"award-number":["2022E01057"]}]},{"name":"Xinjiang Uyghur Autonomous Region","award":["22068035"],"award-info":[{"award-number":["22068035"]}]},{"name":"Xinjiang Uyghur Autonomous Region","award":["HMKJJH202307"],"award-info":[{"award-number":["HMKJJH202307"]}]},{"name":"National Natural Science Foundation of China","award":["2022E01057"],"award-info":[{"award-number":["2022E01057"]}]},{"name":"National Natural Science Foundation of China","award":["22068035"],"award-info":[{"award-number":["22068035"]}]},{"name":"National Natural Science Foundation of China","award":["HMKJJH202307"],"award-info":[{"award-number":["HMKJJH202307"]}]},{"name":"science and technology project of Hami","award":["2022E01057"],"award-info":[{"award-number":["2022E01057"]}]},{"name":"science and technology project of Hami","award":["22068035"],"award-info":[{"award-number":["22068035"]}]},{"name":"science and technology project of Hami","award":["HMKJJH202307"],"award-info":[{"award-number":["HMKJJH202307"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>With cyclohexane (CH), benzene (BE), and ethyl acetate (EA) as solvents, Naomaohu lignite (NL, a typical oil-rich, low-rank coal) from Hami, Xinjiang, was thermally dissolved (TD) to obtain three types of soluble organics (NLCH, NLBE, and NLEA) and the corresponding insoluble portions (NLCH-R, NLBE-R, and NLEA-R). Ultimate analysis, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG-DTG), and gas chromatography\u2013mass spectrometry (GC\/MS) were used to characterize NL and its soluble and insoluble portions. Results showed that, compared with NL, the C element in NLCH-R, NLBE-R, and NLEA-R increased, while the O element decreased significantly, indicating that thermal dissolution is a carbon enrichment process and an effective deoxidation method. The GC\/MS results showed that oxygen-containing organic compounds (OCOCs) are dominant in NLCH, NLBE, and NLEA. NLCH is mainly composed of ketones (11.90%) and esters (19.04%), while NLBE and NLEA are composed of alcohols (12.18% and 2.42%, respectively) and esters (66.09% and 84.08%, respectively), with alkyl and aromatic acid esters as the main components. Among them, EA exhibits significant selective destruction for oxygen-containing functional groups in NL. XPS, FTIR, and TG-DTG results showed that thermal dissolution can not only affect the macromolecular network structure of NL, but also improve its pyrolysis reactivity. In short, thermal dissolution can effectively obtain oxygen-containing organic compounds from NL.<\/jats:p>","DOI":"10.3390\/molecules29122776","type":"journal-article","created":{"date-parts":[[2024,6,11]],"date-time":"2024-06-11T11:58:58Z","timestamp":1718107138000},"page":"2776","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Composition Distribution of the Thermal Soluble Organics from Naomaohu Lignite and Structural Characteristics of the Corresponding Insoluble Portions"],"prefix":"10.3390","volume":"29","author":[{"given":"Meixia","family":"Zhu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaya","family":"Ma","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3837-0915","authenticated-orcid":false,"given":"Wenlong","family":"Mo","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shihao","family":"Hao","sequence":"additional","affiliation":[{"name":"Hami Quality and Metrology Testing Institute, Hami 839000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xianyong","family":"Wei","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"},{"name":"Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5530-5563","authenticated-orcid":false,"given":"Xing","family":"Fan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"},{"name":"College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0260-1606","authenticated-orcid":false,"given":"Tiezhen","family":"Ren","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kongjun","family":"Ma","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jia","family":"Guo","sequence":"additional","affiliation":[{"name":"Xinjiang Energy Co., Ltd., Urumqi 830000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"523","DOI":"10.1016\/j.egyr.2021.01.021","article-title":"Microwave 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