Effects of Supercritical Carbon Dioxide Saturation Temperature on the Multiscale Pore Structure of Coal DOI
Wei He, Yuedu Chen, Haojie Lian

et al.

Energy & Fuels, Journal Year: 2023, Volume and Issue: 37(21), P. 16757 - 16770

Published: Oct. 16, 2023

The influence of supercritical carbon dioxide (ScCO2) on the pore structure coal at different temperatures, especially evolution multiscale (from nanometer scale to millimeter scale), is crucial for CO2 sequestration in deep seams. Thus, measurement techniques, including proximate analysis, adsorption, mercury intrusion porosimetry (MIP), low-field nuclear magnetic resonance (NMR), and X-ray CT scanning, were combined investigate anthracite after ScCO2 saturation temperatures. Findings unveiled a progressive reduction moisture, ash, volatile matter content as temperature increased from 40 100 °C. porosity by 10.48–14.4% under across it gradually with increase temperature. caused temperatures increasing °C less than that before proportion micropores mesopores decreased, while macropores increased. A scan showed that, due coupling effect ScCO2, accelerated growth saturation. After adsorption pores (<50 nm) did not exhibit fractal characteristics, seepage (>50 exhibited favorable characteristic. As increased, dimension indicating roughness complexity decreased Finally, conceptual model was proposed elucidate mechanism This study great significance understanding reservoir during storage

Language: Английский

How Does Subcritical CO2 Affect the Microstructure of Coal under Saturated Water Conditions at Different Temperatures? DOI
Yun Ling, Lingyun Zhao, Ke Wang

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Injecting carbon dioxide (CO2) into coal seams enhances coalbed methane (CBM) recovery and promotes the CO2 geological sequestration. In this process, reservoir temperature plays a crucial role in interaction between coal. However, microstructural changes of at different saturation temperatures under subcritical (Sub CO2) conditions remain unclear. This study used scanning electron microscopy (SEM), low-temperature N2 adsorption, Fourier transform infrared spectroscopy (FTIR) to analyze bituminous anthracite's pore structure molecular various temperatures. The results indicate that after treatment, pores microfractures samples expanded significantly. Under medium high temperatures, number micropores anthracite increased significantly, while exhibited opposite trend. Additionally, content organic functional groups also changed aromaticity both coals with shortening aliphatic chains an elongation jointly influenced evolution micropore structures Analysis treated showed had higher sequestration, whereas was more suitable for CO2-enhanced recovery. These findings provide theoretical basis sequestration enhanced seam reservoirs.

Language: Английский

Citations

1
Micromechanical property evolution and damage mechanism of coal subjected to ScCO2 treatment DOI
Hengyi He, Peng Liu, Baisheng Nie

et al.

Energy, Journal Year: 2024, Volume and Issue: 304, P. 132087 - 132087

Published: June 15, 2024

Language: Английский

Citations

6
Coal Wettability: A Holistic Overview of the Data Sets, Influencing Factors, and Knowledge Gaps DOI Creative Commons
Muhammad Arif, Faisal Ur Rahman Awan, Haiyang Zhang

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(16), P. 15069 - 15084

Published: Aug. 1, 2024

Coal seams are naturally occurring geological media offering tremendous potential for gas storage. The wetting characteristics of coals at typical formations underpin a diverse array processes spanning coal resource recovery, combustion, enhanced beneficiation, methane and CO2 storage sustainable energy transition. An accurate characterization wettability is thus crucial remains an active area research. intrinsic heterogeneity surfaces the presence multicomponent systems add layers intricacy to behavior. In particular, challenging because it complex multifaceted function range influencing parameters. These include parameters (such as rank, ash content, microstructure), operating conditions (e.g., injection pressure, seam temperature, salinity), sample conditioning factors surface roughness, polishing, cleaning, etc.). This study develops repository data sets (using contact angle measurements, nuclear magnetic resonance method, spontaneous imbibition) conditions. critically analyzed explained. We also identify limitations related measurement techniques present outlook future research in this area. findings suggest that coal/CO2/brine exhibit from weakly water-wet strongly CO2-wet. main contributing increased but not limited high low moderate temperatures, salinity, vitrinite reflectance. Thus, offers succinct analysis sets, presents overview cutting-edge technologies, discusses advances field improve understanding associated impact on fluid flow microstructure.

Language: Английский

Citations

5
Review of CO2 utilization and storage in adsorption-type unconventional natural gas reservoirs DOI

Chenhua Ou,

Zunyan You

Fuel, Journal Year: 2024, Volume and Issue: 374, P. 132352 - 132352

Published: July 16, 2024

Language: Английский

Citations

4
Mineral Erosion in Different Microstructures under ScCO2-Water-Coal Interactions: Implications for CO2 Sequestration in Coalbeds DOI
Changbao Jiang,

Wenfeng Xu,

Bozhi Deng

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 23, 2025

Language: Английский

Citations

0
Microstructure Characteristics of Soft and Hard Coal and Its Influence on Gas Adsorption Capacity DOI
Xianfeng Liu,

Chuang Li,

Baisheng Nie

et al.

Solid Fuel Chemistry, Journal Year: 2025, Volume and Issue: 59(2), P. 139 - 149

Published: March 31, 2025

Language: Английский

Citations

0
Effects of supercritical carbon dioxide on macroscopic seepage and microstructure of anthracite under thermo-mechanical coupling DOI Creative Commons
Lei Wang, Guofu Li, Zhaoying Chen

et al.

Case Studies in Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 106094 - 106094

Published: April 1, 2025

Language: Английский

Citations

0
Time Effect Law of Physical and Chemical Properties of Siltstone under Supercritical CO2 DOI Creative Commons
Jianfeng Hao,

Cean Guo,

Bing Qin

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

Language: Английский

Citations

0
Enhancing CO2 Sequestration in Saline Aquifer through Wettability Alteration: A Comprehensive Review of In-Situ Factors and Application of Nanofluid Technology DOI
Ahmed Abdulla Elryes, Berihun Mamo Negash, Nur Asyraf Md Akhir

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(21), P. 20196 - 20223

Published: Oct. 21, 2024

Language: Английский

Citations

1
Effects of Supercritical Carbon Dioxide Saturation Temperature on the Multiscale Pore Structure of Coal DOI
Wei He, Yuedu Chen, Haojie Lian

et al.

Energy & Fuels, Journal Year: 2023, Volume and Issue: 37(21), P. 16757 - 16770

Published: Oct. 16, 2023

The influence of supercritical carbon dioxide (ScCO2) on the pore structure coal at different temperatures, especially evolution multiscale (from nanometer scale to millimeter scale), is crucial for CO2 sequestration in deep seams. Thus, measurement techniques, including proximate analysis, adsorption, mercury intrusion porosimetry (MIP), low-field nuclear magnetic resonance (NMR), and X-ray CT scanning, were combined investigate anthracite after ScCO2 saturation temperatures. Findings unveiled a progressive reduction moisture, ash, volatile matter content as temperature increased from 40 100 °C. porosity by 10.48–14.4% under across it gradually with increase temperature. caused temperatures increasing °C less than that before proportion micropores mesopores decreased, while macropores increased. A scan showed that, due coupling effect ScCO2, accelerated growth saturation. After adsorption pores (<50 nm) did not exhibit fractal characteristics, seepage (>50 exhibited favorable characteristic. As increased, dimension indicating roughness complexity decreased Finally, conceptual model was proposed elucidate mechanism This study great significance understanding reservoir during storage

Language: Английский

Citations

3