Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal
In order to analyze the influence of supercritical CO2 on pore structure and desorption characteristics of tectonic coal, a high-temperature and high-pressure geological environment simulation system was used to treat primary coal and tectonic coal with supercritical CO2, and then mercury injection...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Safety in Coal Mines
2025-06-01
|
| Series: | Meikuang Anquan |
| Subjects: | |
| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240950 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849690285006651392 |
|---|---|
| author | Fanfan NIU Erlei SU Jiaqi WEI Xinyu ZHU |
| author_facet | Fanfan NIU Erlei SU Jiaqi WEI Xinyu ZHU |
| author_sort | Fanfan NIU |
| collection | DOAJ |
| description | In order to analyze the influence of supercritical CO2 on pore structure and desorption characteristics of tectonic coal, a high-temperature and high-pressure geological environment simulation system was used to treat primary coal and tectonic coal with supercritical CO2, and then mercury injection method and coal sample desorption experimental system were used to quantitatively characterize the pore structure and desorption characteristics of coal. The results show that the total pore volume of coal samples increases after supercritical CO2 treatment, and the pore expansion effect of supercritical CO2 on tectonic coal is more obvious. Due to the extraction and dissolution effect of supercritical CO2, the pore size of structural coal increases to a certain extent, and the changes of small hole and large hole are the most obvious. The increment of hysteresis loop of treated tectonic coal is significantly higher than that of primary coal, indicating that the pore network of treated structural coal is more developed and the connectivity is better. At equilibrium pressures of 0.74 MPa and 3.00 MPa, the increase in the desorption capacity of tectonic coal after supercritical CO2 treatment is significantly higher than that of primary coal, which is caused by the increase in the total pore volume of tectonic coal after supercritical CO2 treatment. |
| format | Article |
| id | doaj-art-142337120faa4b689c6621fbf413bfc3 |
| institution | DOAJ |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-06-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-142337120faa4b689c6621fbf413bfc32025-08-20T03:21:22ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-06-01566273210.13347/j.cnki.mkaq.20240950lyMKAQ20240950Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coalFanfan NIU0Erlei SU1Jiaqi WEI2Xinyu ZHU3School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaIn order to analyze the influence of supercritical CO2 on pore structure and desorption characteristics of tectonic coal, a high-temperature and high-pressure geological environment simulation system was used to treat primary coal and tectonic coal with supercritical CO2, and then mercury injection method and coal sample desorption experimental system were used to quantitatively characterize the pore structure and desorption characteristics of coal. The results show that the total pore volume of coal samples increases after supercritical CO2 treatment, and the pore expansion effect of supercritical CO2 on tectonic coal is more obvious. Due to the extraction and dissolution effect of supercritical CO2, the pore size of structural coal increases to a certain extent, and the changes of small hole and large hole are the most obvious. The increment of hysteresis loop of treated tectonic coal is significantly higher than that of primary coal, indicating that the pore network of treated structural coal is more developed and the connectivity is better. At equilibrium pressures of 0.74 MPa and 3.00 MPa, the increase in the desorption capacity of tectonic coal after supercritical CO2 treatment is significantly higher than that of primary coal, which is caused by the increase in the total pore volume of tectonic coal after supercritical CO2 treatment.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240950supercritical co2carbon sequestrationpore structuredesorption characteristicstectonic coalcoalbed methane recovery |
| spellingShingle | Fanfan NIU Erlei SU Jiaqi WEI Xinyu ZHU Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal Meikuang Anquan supercritical co2 carbon sequestration pore structure desorption characteristics tectonic coal coalbed methane recovery |
| title | Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal |
| title_full | Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal |
| title_fullStr | Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal |
| title_full_unstemmed | Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal |
| title_short | Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal |
| title_sort | effect of supercritical co2 on pore structure and desorption characteristics of tectonic coal |
| topic | supercritical co2 carbon sequestration pore structure desorption characteristics tectonic coal coalbed methane recovery |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240950 |
| work_keys_str_mv | AT fanfanniu effectofsupercriticalco2onporestructureanddesorptioncharacteristicsoftectoniccoal AT erleisu effectofsupercriticalco2onporestructureanddesorptioncharacteristicsoftectoniccoal AT jiaqiwei effectofsupercriticalco2onporestructureanddesorptioncharacteristicsoftectoniccoal AT xinyuzhu effectofsupercriticalco2onporestructureanddesorptioncharacteristicsoftectoniccoal |