Structural evolution characteristics of sulfur in coal during gold-tube thermal simulation
This study used a gold tube thermal simulation experiment to investigate the release of gases, the formation of free sulfur-containing compounds, and the evolution of coal macromolecules and organic sulfur structures. Results indicate that at Easy%Ro = 0.71, the drying coefficient (C1/ΣC1–5) of high...
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Elsevier
2025-04-01
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| Series: | Fuel Processing Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0378382025000074 |
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| author | Liping Xue Yuegang Tang Shuo Gao |
| author_facet | Liping Xue Yuegang Tang Shuo Gao |
| author_sort | Liping Xue |
| collection | DOAJ |
| description | This study used a gold tube thermal simulation experiment to investigate the release of gases, the formation of free sulfur-containing compounds, and the evolution of coal macromolecules and organic sulfur structures. Results indicate that at Easy%Ro = 0.71, the drying coefficient (C1/ΣC1–5) of high-organic‑sulfur coal is significantly higher than that of low-organic‑sulfur coal. When Easy%Ro ≥ 3.64, the organic sulfur content in coal significantly promotes methane generation. At Easy%Ro = 1.75, small molecules of free organic sulfur are most abundant in coal. At Easy%Ro ≥ 3.64, low and high-organic‑sulfur coals produce elemental sulfur S8 and ester sulfate compounds. FTIR analysis reveals that high-organic‑sulfur coal contains more aliphatic hydrocarbon structures, resulting in lower aromaticity parameter I than low-organic‑sulfur coal at the same coalification level. In contrast, the hydrocarbon generation potential factor “A” is higher, indicating that organic sulfur inhibits coal aromatization, and high-organic‑sulfur coal has a higher hydrocarbon generation potential. XPS analysis shows that thiophene and sulfoxide are relatively more abundant in high-organic‑sulfur coal, with the highest reaching 91.24 % in SHOS coal. The aromaticity of organic sulfur rapidly increases when Easy%Ro < 1.75, followed by possible inhibition of thiophenic sulfur production by sulfones and sulfoxides in coal, resulting in decreased aromaticity. |
| format | Article |
| id | doaj-art-04a4b1f37bff49fba82dce87ff99aaec |
| institution | Kabale University |
| issn | 0378-3820 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
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| series | Fuel Processing Technology |
| spelling | doaj-art-04a4b1f37bff49fba82dce87ff99aaec2025-02-09T04:59:41ZengElsevierFuel Processing Technology0378-38202025-04-01268108183Structural evolution characteristics of sulfur in coal during gold-tube thermal simulationLiping Xue0Yuegang Tang1Shuo Gao2College of Geoscience and Surveying Engineering, China University of Mining & Technology (Beijing), Beijing 100083, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; Corresponding author at: China University of Mining & Technology (Beijing), D11, Xueyuan Road, Haidian District, Beijing 100083, China.College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, ChinaThis study used a gold tube thermal simulation experiment to investigate the release of gases, the formation of free sulfur-containing compounds, and the evolution of coal macromolecules and organic sulfur structures. Results indicate that at Easy%Ro = 0.71, the drying coefficient (C1/ΣC1–5) of high-organic‑sulfur coal is significantly higher than that of low-organic‑sulfur coal. When Easy%Ro ≥ 3.64, the organic sulfur content in coal significantly promotes methane generation. At Easy%Ro = 1.75, small molecules of free organic sulfur are most abundant in coal. At Easy%Ro ≥ 3.64, low and high-organic‑sulfur coals produce elemental sulfur S8 and ester sulfate compounds. FTIR analysis reveals that high-organic‑sulfur coal contains more aliphatic hydrocarbon structures, resulting in lower aromaticity parameter I than low-organic‑sulfur coal at the same coalification level. In contrast, the hydrocarbon generation potential factor “A” is higher, indicating that organic sulfur inhibits coal aromatization, and high-organic‑sulfur coal has a higher hydrocarbon generation potential. XPS analysis shows that thiophene and sulfoxide are relatively more abundant in high-organic‑sulfur coal, with the highest reaching 91.24 % in SHOS coal. The aromaticity of organic sulfur rapidly increases when Easy%Ro < 1.75, followed by possible inhibition of thiophenic sulfur production by sulfones and sulfoxides in coal, resulting in decreased aromaticity.http://www.sciencedirect.com/science/article/pii/S0378382025000074SulfurThermal simulationEvolutionHydrocarbon generationAromaticity |
| spellingShingle | Liping Xue Yuegang Tang Shuo Gao Structural evolution characteristics of sulfur in coal during gold-tube thermal simulation Fuel Processing Technology Sulfur Thermal simulation Evolution Hydrocarbon generation Aromaticity |
| title | Structural evolution characteristics of sulfur in coal during gold-tube thermal simulation |
| title_full | Structural evolution characteristics of sulfur in coal during gold-tube thermal simulation |
| title_fullStr | Structural evolution characteristics of sulfur in coal during gold-tube thermal simulation |
| title_full_unstemmed | Structural evolution characteristics of sulfur in coal during gold-tube thermal simulation |
| title_short | Structural evolution characteristics of sulfur in coal during gold-tube thermal simulation |
| title_sort | structural evolution characteristics of sulfur in coal during gold tube thermal simulation |
| topic | Sulfur Thermal simulation Evolution Hydrocarbon generation Aromaticity |
| url | http://www.sciencedirect.com/science/article/pii/S0378382025000074 |
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