Experimental study on isothermal adsorption and desorption characteristics and influencing factors of transitional facies shale gas DOI Creative Commons
Zijun Tang, Wei Xiong, Wei Guo

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 24, 2025

Methane adsorption and desorption are important for shale gas storage production, but the effects of shale, temperature, pressure, water content not fully understood. This study looks at methane in reservoirs under different conditions. It highlights how molecules compete sites, reducing capacity. A new ternary Langmuir model is introduced, which better describes behavior than traditional model. The results show that increases with pressure decreases reduces further. There also a linear relationship between volume (VL) (PL) temperature changes. shows usefulness predicting provides useful insights resource development.

Language: Английский

Hydrogen storage state in clay mineral nanopores: A molecular dynamics simulation study DOI
Chun Yang, Zhijun Jin

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 105, P. 1491 - 1502

Published: Feb. 5, 2025

Language: Английский

Citations

6
Adsorption-Induced Deformation in Microporous Kerogen by Hydrogen and Methane: Implications for Underground Hydrogen Storage DOI Creative Commons
Saeed Babaei, Benoît Coasne, Mehdi Ostadhassan

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 2, 2025

Accurately assessing the adsorption and diffusion behaviors of H2, CH4, their mixtures are essential for estimating underground hydrogen storage (UHS). This understanding is critical safe efficient H2 in depleted shale gas reservoirs. Although kerogen has been extensively studied, adsorption-induced swelling remains unexplored UHS. In this study, we investigate mechanisms using Lagrangian Eulerian approaches analyze through molecular simulations. Our results reveal that presence cushion gases like which exhibit stronger than neglecting deformation can lead to an underestimation capacity by approximately 40%. Furthermore, increasing pressure makes behavior deviate from consistent trend observed with either or contracting depending on pore size. Simulations also predict self-diffusion coefficient porous 1 order magnitude higher CH4. These findings highlight importance incorporating flexibility into modeling UHS involving multiple species improve accuracy safety operations

Language: Английский

Citations

0
Hydrogen storage potential of coal: influence of coal on pore structure and adsorption mechanisms DOI Creative Commons

Liru Tao,

Yiwen Ju

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 15, 2025

The development of clean energy is crucial for the transition to a low-carbon economy, and hydrogen, with its high density environmental friendliness, has become increasingly important. Coal, as porous medium, provides possible site underground storage hydrogen. structural evolution coal during coalification significantly influences hydrogen adsorption capabilities within nanopores, yet comprehensive studies evaluating potential in coals different ranks (low, high) remain limited. Our study innovatively addresses this research gap by investigating low-, medium-, high-rank seams, focusing particularly on how molecular structure affects pore mechanisms. Coal samples representing various were collected from basins China. Multiple experimental techniques, including CO 2 low-temperature N adsorption, isotherms, XRD, HRTEM analyses, employed characterize structures properties comprehensively. Results indicate that rich nanopores. correlation microporous characteristics, which determines capacity. With increase rank, capacity showed an obvious four-stage pattern. High-rank strong capacity, faster rate lower retention after desorption, more suitable storage. These findings enhance fundamental understanding coal-hydrogen interactions provide guidelines selecting optimal geological reservoirs

Language: Английский

Citations

0
Experimental study on isothermal adsorption and desorption characteristics and influencing factors of transitional facies shale gas DOI Creative Commons
Zijun Tang, Wei Xiong, Wei Guo

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 24, 2025

Methane adsorption and desorption are important for shale gas storage production, but the effects of shale, temperature, pressure, water content not fully understood. This study looks at methane in reservoirs under different conditions. It highlights how molecules compete sites, reducing capacity. A new ternary Langmuir model is introduced, which better describes behavior than traditional model. The results show that increases with pressure decreases reduces further. There also a linear relationship between volume (VL) (PL) temperature changes. shows usefulness predicting provides useful insights resource development.

Language: Английский

Citations

0