Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example
Abstract The gas generation features of coals at different maturities were studied by the anhydrous pyrolysis of Jurassic coal from the Minhe Basin in sealed gold tubes at 50 MPa. The gas component yields (C1, C2, C3, i-C4, n-C4, i-C5, n-C5, and CO2); the δ 13C of C1, C2, C3, and CO2; and the mass o...
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doaj-9d1035da6a8140eeac84616b717073ae2021-04-25T11:29:27ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232020-04-017361162210.1007/s40789-020-00318-zGas generation from coal: taking Jurassic coal in the Minhe Basin as an exampleDeliang Fu0Guosheng Xu1Li Ma2Fu Yang3Dan He4Zhonghui Duan5Yu Ma6Key Laboratory of Coal Exploration and Comprehensive Utilization, Ministry of Nature and Resources, Shaanxi Coal Geology Group Co., Ltd.College of Energy, Chengdu University of TechnologyKey Laboratory of Coal Exploration and Comprehensive Utilization, Ministry of Nature and Resources, Shaanxi Coal Geology Group Co., Ltd.Key Laboratory of Coal Exploration and Comprehensive Utilization, Ministry of Nature and Resources, Shaanxi Coal Geology Group Co., Ltd.Key Laboratory of Coal Exploration and Comprehensive Utilization, Ministry of Nature and Resources, Shaanxi Coal Geology Group Co., Ltd.Key Laboratory of Coal Exploration and Comprehensive Utilization, Ministry of Nature and Resources, Shaanxi Coal Geology Group Co., Ltd.Ningxia Institute of Geological SurveyAbstract The gas generation features of coals at different maturities were studied by the anhydrous pyrolysis of Jurassic coal from the Minhe Basin in sealed gold tubes at 50 MPa. The gas component yields (C1, C2, C3, i-C4, n-C4, i-C5, n-C5, and CO2); the δ 13C of C1, C2, C3, and CO2; and the mass of the liquid hydrocarbons (C6+) were measured. On the basis of these data, the stage changes of δ 13C1, δ 13C2, δ 13C3, and δ 13CO2 were calculated. The diagrams of δ 13C1–δ 13C2 vs ln (C1/C2) and δ 13C2–δ 13C1 vs δ 13C3–δ 13C2 were used to evaluate the gas generation features of the coal maturity stages. At the high maturity evolution stage (T > 527.6 °C at 2 °C/h), the stage change of δ 13C1 and the CH4 yield are much higher than that of CO2, suggesting that high maturity coal could still generate methane. When T < 455 °C, CO2 is generated by breaking bonds between carbons and heteroatoms. The reaction between different sources of coke and water may be the reason for the complicated stage change in $$\delta^{{{13}}} {\text{C}}_{{{\text{CO}}_{{2}} }}$$ δ 13 C CO 2 when the temperature was higher than 455 °C. With increasing pyrolysis temperature, δ 13C1–δ 13C2 vs ln (C1/C2) has four evolution stages corresponding to the early stage of breaking bonds between carbon and hetero atoms, the later stage of breaking bonds between carbon and hetero atoms, the cracking of C6+ and coal demethylation, and the cracking of C2–5. The δ 13C2–δ 13C1 vs δ 13C3–δ 13C2 has three evolution stages corresponding to the breaking bonds between carbon and hetero atoms, demethylation and cracking of C6+, and cracking of C2–5.https://doi.org/10.1007/s40789-020-00318-zJurassic coalPyrolysisGas generationδ 13CStage evolution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Deliang Fu Guosheng Xu Li Ma Fu Yang Dan He Zhonghui Duan Yu Ma |
spellingShingle |
Deliang Fu Guosheng Xu Li Ma Fu Yang Dan He Zhonghui Duan Yu Ma Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example International Journal of Coal Science & Technology Jurassic coal Pyrolysis Gas generation δ 13C Stage evolution |
author_facet |
Deliang Fu Guosheng Xu Li Ma Fu Yang Dan He Zhonghui Duan Yu Ma |
author_sort |
Deliang Fu |
title |
Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example |
title_short |
Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example |
title_full |
Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example |
title_fullStr |
Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example |
title_full_unstemmed |
Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example |
title_sort |
gas generation from coal: taking jurassic coal in the minhe basin as an example |
publisher |
SpringerOpen |
series |
International Journal of Coal Science & Technology |
issn |
2095-8293 2198-7823 |
publishDate |
2020-04-01 |
description |
Abstract The gas generation features of coals at different maturities were studied by the anhydrous pyrolysis of Jurassic coal from the Minhe Basin in sealed gold tubes at 50 MPa. The gas component yields (C1, C2, C3, i-C4, n-C4, i-C5, n-C5, and CO2); the δ 13C of C1, C2, C3, and CO2; and the mass of the liquid hydrocarbons (C6+) were measured. On the basis of these data, the stage changes of δ 13C1, δ 13C2, δ 13C3, and δ 13CO2 were calculated. The diagrams of δ 13C1–δ 13C2 vs ln (C1/C2) and δ 13C2–δ 13C1 vs δ 13C3–δ 13C2 were used to evaluate the gas generation features of the coal maturity stages. At the high maturity evolution stage (T > 527.6 °C at 2 °C/h), the stage change of δ 13C1 and the CH4 yield are much higher than that of CO2, suggesting that high maturity coal could still generate methane. When T < 455 °C, CO2 is generated by breaking bonds between carbons and heteroatoms. The reaction between different sources of coke and water may be the reason for the complicated stage change in $$\delta^{{{13}}} {\text{C}}_{{{\text{CO}}_{{2}} }}$$ δ 13 C CO 2 when the temperature was higher than 455 °C. With increasing pyrolysis temperature, δ 13C1–δ 13C2 vs ln (C1/C2) has four evolution stages corresponding to the early stage of breaking bonds between carbon and hetero atoms, the later stage of breaking bonds between carbon and hetero atoms, the cracking of C6+ and coal demethylation, and the cracking of C2–5. The δ 13C2–δ 13C1 vs δ 13C3–δ 13C2 has three evolution stages corresponding to the breaking bonds between carbon and hetero atoms, demethylation and cracking of C6+, and cracking of C2–5. |
topic |
Jurassic coal Pyrolysis Gas generation δ 13C Stage evolution |
url |
https://doi.org/10.1007/s40789-020-00318-z |
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