A numerical modelling study to support design of an in-situ CO2 injection test facility using horizontal injection well in a shallow-depth coal seam

Masum, Shakil; Chen, Min; Hosking, Lee J.; Stańczyk, Kamil; Kapusta, Krzysztof; Thomas, Hywel Rhys

doi:10.1016/j.ijggc.2022.103725

Cited by 14 publications

(13 citation statements)

References 46 publications

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“…Additionally, by selecting a coal deposit that is surrounded by tight, impermeable host-rock (e.g., the seam "310" at the Barbara Mine, Poland) will further reduce safety concerns associated with shallow-depth coal seams. The in situ CO 2 injection test, 7 designed for testing the gas storage in a shallow-depth coal seams, will provide vital information on safety and effectiveness of such coal deposits with greater details. In general, gas adsorption is physical and reversible.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The abandoned or decommissioned mines have the potential to be retrofitted as CO 2 storage units enabling their continuous operation on reducing atmospheric CO 2 emissions and providing economic incentives . Since the decline of coal mining, shallow seams are becoming increasingly available for new low carbon developments, and the utility of such mines for CO 2 storage is currently investigated under the EU funded ROCCS project …”

Section: Introductionmentioning

confidence: 99%

“…6 Since the decline of coal mining, shallow seams are becoming increasingly available for new low carbon developments, and the utility of such mines for CO 2 storage is currently investigated under the EU funded ROCCS project. 7 Mechanisms of CO 2 adsorption or coal−CO 2 interactions are important to estimate the storage capacity of specific coal seams and understand its storage behaviors. CO 2 storage potential is evident in all coal ranks, but the adsorption capacity varies with rank, moisture content, swelling characteristics, porosity, temperature, and operating pressures.…”

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low Subcritical CO₂ Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam

et al. 2023

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This study focuses on improving fundamental understanding of low, subcritical CO2 adsorption–desorption behavior of bituminous coals with the aim to evaluate the utility of shallow-depth coal seams for safe and effective CO2 storage. Comprehensive data and a detailed description of coal–CO2 interactions, e.g., adsorption, desorption, and hysteresis behavior of intact bituminous coals at CO2 pressures <0.5 MPa, are limited. Manometric sorption experiments were performed on coal cores (50 mm dia. and 30- or 60-mm length) obtained from a 30 m deep coal seam located at the Upper Silesian Basin in Poland. Experimental results revealed that the adsorption capacities were correlated to void volume and equilibrium time under low-pressure injection (0.5 MPa). The positive deviation, observed in the hysteresis of adsorption–desorption isotherm patterns, and the increased sample mass at the end of the tests suggested CO2 pore diffusion and condensation. This behavior is vital for assessing low-pressure CO2 injection and storage capabilities of shallow coal seams where confining pressure is much lower than that of the deeper seams. Overall, CO2 adsorption depicts a type II adsorption isotherm and a type H3 hysteresis pattern of the IUPAC classification. Experimental results fitted better to the Brunauer–Emmett–Teller model than the Langmuir isotherm model. CO2 adsorption behavior of intact cores was also evaluated by characteristic curves. It was found that Curve I favored physical forces, i.e., the presence of van der Waals/London dispersion forces to describe the coal–CO2 interactions. However, analysis of Curve II indicated that the changing pressure-volume behavior of CO2 in the adsorbed phase, under low equilibrium pressures, cannot be ignored.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low Subcritical CO₂ Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam

et al. 2023

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“…Considering the two distinct porosity systems of coal reservoirs, the dual porosity model is usually used to represent the flow process of fluid in coals, for example. ,, The governing equations for fluid flow in dual porosity media are written as where ρ f and ρ m are the gas densities in the fracture and matrix, respectively, ϕ f and ϕ m are the porosities of both continua, v is the flow velocity, Γ mf is the mass transfer between fracture and matrix continua, and Q s is the gas source. The source term Q s in this work is only considered from gas adsorption, and eqs and are applied for calculation of the source term during adsorption and desorption, respectively.…”

Section: A1mentioning

confidence: 99%

Modeling Gas Adsorption–Desorption Hysteresis in Energetically Heterogeneous Coal and Shale

et al. 2023

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Adsorption of gases in porous adsorbents such as coal and shale generally exhibits the phenomenon of hysteresis. Most of the previous studies on desorption hysteresis were conducted via experimental tests. However, few theoretical models that represent adsorption−desorption hysteresis of gases in porous sorbents are available. To address this issue, this work develops a new adsorption−desorption model for describing adsorption and desorption isotherms of gases with hysteresis. Particularly, the energetically heterogeneous surfaces of an adsorbent are considered via the patchwise model. Based on the change in site energy distribution, a logarithmically pressure-dependent hysteresis index, which is used to measure the degree of hysteresis, is derived for quantitative assessment of the degree of hysteresis. Besides, the correlation between the desorption isotherm and initialized pressure for desorption is established. The accuracy of the proposed model to adequately describe the adsorption−desorption hysteresis of gas in coal and shale is demonstrated by validating the model against laboratory experiments obtained from the literature. The results indicate that the adsorption isotherm depends significantly on site energy distribution. By comparing the site energy distributions for adsorption and desorption isotherms, it is found that the desorption hysteresis can be attributed to the change in pore size distribution caused by adsorption-induced deformation. The analyses support that the proposed model can be used as an effective tool to quantitatively predict the amount of released gas during desorption, which is significant for designing coalbed methane or shale gas production and assessing long-term CO 2 storage behavior.

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Effects of Coal Thickness on the Fractal Dimension of Gas Migration Channels: Laboratory and Field Study of a Gassy Coal Mine

Zhuo,

Zhao,

et al. 2024

Nat Resour Res

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A numerical modelling study to support design of an in-situ CO2 injection test facility using horizontal injection well in a shallow-depth coal seam

Cited by 14 publications

References 46 publications

Low Subcritical CO₂ Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam

Low Subcritical CO₂ Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam

Modeling Gas Adsorption–Desorption Hysteresis in Energetically Heterogeneous Coal and Shale

Effects of Coal Thickness on the Fractal Dimension of Gas Migration Channels: Laboratory and Field Study of a Gassy Coal Mine

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A numerical modelling study to support design of an in-situ CO2 injection test facility using horizontal injection well in a shallow-depth coal seam

Cited by 14 publications

References 46 publications

Low Subcritical CO2 Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam

Low Subcritical CO2 Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam

Modeling Gas Adsorption–Desorption Hysteresis in Energetically Heterogeneous Coal and Shale

Effects of Coal Thickness on the Fractal Dimension of Gas Migration Channels: Laboratory and Field Study of a Gassy Coal Mine

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Low Subcritical CO₂ Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam

Low Subcritical CO₂ Adsorption–Desorption Behavior of Intact Bituminous Coal Cores Extracted from a Shallow Coal Seam