A review of influencing factors and study methods of carbon capture and storage (CCS) potential in coals

Safaei-Farouji, Majid; Misch, David; Sachsenhofer, Reinhard F.

doi:10.1016/j.coal.2023.104351

Cited by 10 publications

(7 citation statements)

References 156 publications

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“…where N ad (excess) is the excess adsorption amount in mL/g; N ad (absolute) is the absolute sorption amount in mL/g; and V p is the pore volume of the porous material in cm 3 . CH 4 molecule is selected as the probe by Atom Volumes and Surfaces module in the Tool, and the Connolly radius is set to 1.9 A, that is, 0.19 nm.…”

Section: Construction Of Three-dimensional Macromolecules Of Coalmentioning

confidence: 99%

“…CH 4 molecule is selected as the probe by Atom Volumes and Surfaces module in the Tool, and the Connolly radius is set to 1.9 A, that is, 0.19 nm. ρ is the gas density under simulated pressure and temperature conditions in g/cm 3 .…”

Section: Construction Of Three-dimensional Macromolecules Of Coalmentioning

confidence: 99%

“…35,36 In order to ensure that the model can reach the real state of the coal sample, it is necessary to continue to set the boundary conditions after geometric optimization and annealing treatment, that is, density optimization. 37 According to the field measurement, the density of DT and HW coal samples is determined to be 1.35 and 1.32 g/cm 3 , respectively, so that a more accurate three-dimensional structure model can be obtained. Multiple coal molecules placed in the same cell can more accurately characterize the structure of the coal.…”

Section: Construction Of Three-dimensional Macromolecules Of Coalmentioning

confidence: 99%

“…Coalbed methane (CBM) usually exists in the coal matrix in adsorbed state, , and its effective exploitation is of great significance to optimize the national energy structure and prevent gas outburst. − However, due to its dense structure, coal seams are generally characterized by low permeability and low porosity, , which lead to the difficulty of CBM extraction and aggravates the gas dynamic disaster during coal mining. Hydraulic fracturing − is widely used in the field of CBM production, which can effectively enhance the permeability and realize reservoir transformation, thereby enhancing the efficiency of CBM production and reducing the probability of coal mine gas accidents.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Slickwater on Methane Adsorption in Coal: Experiment and Molecular Simulation

Li,

Wang,

Ning

et al. 2024

Energy Fuels

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Slickwater is generally applied in the domain of coalbed methane (CBM) stimulation. However, the residual slickwater after fracturing operations may adversely affect the production of CBM. In this paper, nuclear magnetic resonance (NMR) measurements are used to compare and analyze the differences of functional groups on the coal surface in different regions and provide the basis for the construction of molecular simulation models. Then, different concentrations of slickwater were made, and coal samples from different regions were soaked. Isothermal adsorption experiments and molecular simulations were applied to explore the effect of slickwater on methane adsorption properties of coal from different regions. The NMR results show that the amount of naphthalene functional groups in coal samples from Dongtan coal mine (DT) is more than that in coal samples from Houwenjialiang coal mine (HW), which has a stronger attraction to methane. The isothermal adsorption experiment results show that the methane adsorption capacity of the coal sample from HW is stronger than that of the coal sample from DT. When the concentration of slickwater is 0.5%, the methane adsorption capacity of DT increases to 3/2 of raw coal, and the methane adsorption capacity of HW declines to 1/3 of raw coal. The retention of slickwater will have different effects on coal samples in different areas. Comparing the experimental and simulation results, we can see that polyacrylamide can adsorb methane, thereby increasing the specific surface area of the local “slickwater–coal” system due to its porous coating structure, resulting in an increase in the methane adsorption capacity. The negative effect of slickwater on the methane adsorption properties is because slickwater changes the pore, resulting in the reduction of effective surface area and finally damages the adsorption amount of methane.

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Section: Construction Of Three-dimensional Macromolecules Of Coalmentioning

confidence: 99%

Section: Construction Of Three-dimensional Macromolecules Of Coalmentioning

confidence: 99%

Section: Construction Of Three-dimensional Macromolecules Of Coalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Slickwater on Methane Adsorption in Coal: Experiment and Molecular Simulation

Li,

Wang,

Ning

et al. 2024

Energy Fuels

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“…In the oil and gas industry, this data is required, among other things, for assessing the rocks' capacity to accumulate crude oil or natural gas [2,3]. The porosity of rocks is a crucial parameter in geological and geophysical studies [4], aiding in determining the structural composition and properties of rocks [5] and describing the adsorption parameters of rocks [6][7][8][9]. Porosity analyses are instrumental in hydrogeological issues, such as the ability of groundwater to move in underground water reservoirs, water resource management, and source water protection [10,11].…”

Section: Introductionmentioning

confidence: 99%

Application of Petrographic and Stereological Analyses to Describe the Pore Space of Rocks as a Standard for the Characterization of Pores in Slags and Ashes Generated after the Combustion of Municipal Waste

Godyń,

Dutka,

Tram

2023

Materials

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Slags and ashes generated in thermal waste treatment facilities require proper management. In line with the principles of the circular economy, new, more economical, and ecological possibilities for utilizing these substances are sought. These waste materials exhibit characteristics similar to rocks in many aspects. This study focuses on analyzing the similarities and differences between nine selected rocks and three samples of slags and ashes obtained from municipal waste incineration. The main research device used was a polarizing microscope, using reflected, transmitted, and fluorescent light. Additionally, low-pressure gas adsorption equipment, as well as helium and quasi-liquid pycnometers, were used for complementary analysis. The parameters analyzed mainly covered broadly defined petrographic properties of rocks and slags, with a particular emphasis on porosity, porous structure, and the spatial distribution of pores and fractures. The conducted analyses confirmed a significant similarity between slags and ashes and clastic sedimentary rocks such as sandstones and mudstones. The research results underscore the importance of petrographic microscopic studies for analyzing materials other than rocks. They also allow for exploring applications for slags and ashes in areas traditionally reserved for natural rock resources. The findings also indicate the necessity of using methods other than microscopic ones to describe the pore space of rocks. The lower measurement range of the optical microscope is limited to approximately 1 μm, covering only macropores. Other methods extend this characteristic to micro- and mesopores. Therefore, a combination of different methods is often employed to obtain a more comprehensive characterization of rock porosity.

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Potential for CO2 Sequestration in Coal and Shale

Hazra,

Chandra,

Vishal

2024

Unconventional Hydrocarbon Reservoirs: Coal and Shale

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A review of influencing factors and study methods of carbon capture and storage (CCS) potential in coals

Cited by 10 publications

References 156 publications

Effect of Slickwater on Methane Adsorption in Coal: Experiment and Molecular Simulation

Effect of Slickwater on Methane Adsorption in Coal: Experiment and Molecular Simulation

Application of Petrographic and Stereological Analyses to Describe the Pore Space of Rocks as a Standard for the Characterization of Pores in Slags and Ashes Generated after the Combustion of Municipal Waste

Potential for CO2 Sequestration in Coal and Shale

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