In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding
© 2019 Elsevier B.V. Carbon dioxide geosequestration into deep unmineable coal seams is a technique which can mitigate anthropogenic greenhouse gas emissions. However, coal composition is always complex, and some minerals such as calcite chemically react when exposed to the acidic environment (which...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier BV
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/74656 |
| _version_ | 1848763336409219072 |
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| author | Zhang, Y. Lebedev, Maxim Jing, Y. Yu, H. Iglauer, Stefan |
| author_facet | Zhang, Y. Lebedev, Maxim Jing, Y. Yu, H. Iglauer, Stefan |
| author_sort | Zhang, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2019 Elsevier B.V. Carbon dioxide geosequestration into deep unmineable coal seams is a technique which can mitigate anthropogenic greenhouse gas emissions. However, coal composition is always complex, and some minerals such as calcite chemically react when exposed to the acidic environment (which is created by scCO2 mixing with formation water). These reactive transport processes are still poorly understood. We thus imaged a water-bearing heterogeneous coal (calcite rich) core before and after scCO2 injection in-situ at high resolution (3.43 µm) in 3D via X-ray micro-tomography. Indeed, the calcite- fusinite mix phase was partially dissolved, and absolute porosity and connectivity significantly increased. We thus suggest that such a process could be used as an acidizing method for enhanced coal bed methane (ECBM) production, thus significantly improving the permeability performance, CO2 injectivity and the associated methane permeability. |
| first_indexed | 2025-11-14T11:01:50Z |
| format | Journal Article |
| id | curtin-20.500.11937-74656 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:01:50Z |
| publishDate | 2019 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-746562023-08-02T06:39:15Z In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding Zhang, Y. Lebedev, Maxim Jing, Y. Yu, H. Iglauer, Stefan © 2019 Elsevier B.V. Carbon dioxide geosequestration into deep unmineable coal seams is a technique which can mitigate anthropogenic greenhouse gas emissions. However, coal composition is always complex, and some minerals such as calcite chemically react when exposed to the acidic environment (which is created by scCO2 mixing with formation water). These reactive transport processes are still poorly understood. We thus imaged a water-bearing heterogeneous coal (calcite rich) core before and after scCO2 injection in-situ at high resolution (3.43 µm) in 3D via X-ray micro-tomography. Indeed, the calcite- fusinite mix phase was partially dissolved, and absolute porosity and connectivity significantly increased. We thus suggest that such a process could be used as an acidizing method for enhanced coal bed methane (ECBM) production, thus significantly improving the permeability performance, CO2 injectivity and the associated methane permeability. 2019 Journal Article http://hdl.handle.net/20.500.11937/74656 10.1016/j.coal.2019.01.002 Elsevier BV restricted |
| spellingShingle | Zhang, Y. Lebedev, Maxim Jing, Y. Yu, H. Iglauer, Stefan In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding |
| title | In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding |
| title_full | In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding |
| title_fullStr | In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding |
| title_full_unstemmed | In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding |
| title_short | In-situ X-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical CO2 flooding |
| title_sort | in-situ x-ray micro-computed tomography imaging of the microstructural changes in water-bearing medium rank coal by supercritical co2 flooding |
| url | http://hdl.handle.net/20.500.11937/74656 |