Surface deposition characteristics of water-based SiO2 nanofluids on coal

Zou, Quanle; Huo, Zixuan; Zhang, Tiancheng; Jiang, Chengzi; Liang, Jinyan

doi:10.1016/j.fuel.2023.127489

Cited by 23 publications

(9 citation statements)

References 39 publications

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“…The increasing global energy consumption has drawn continuous attention to fossil fuels . As one of the most important and indispensable energy sources globally, coal serves as a vital pillar for global economic development. , However, the extraction of coal resources often results in significant coal dust emissions . These coal dust emissions can trigger pneumoconiosis, affecting the health of miners. − Additionally, they can lead to explosion accidents in enclosed spaces .…”

Section: Introductionmentioning

confidence: 99%

Study on the Water Absorption Characteristics of Anthracite Particles after Immersion in Water

Jin,

Wang,

Duan

et al. 2024

ACS Omega

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Section: Introductionmentioning

confidence: 99%

Study on the Water Absorption Characteristics of Anthracite Particles after Immersion in Water

Jin,

Wang,

Duan

et al. 2024

ACS Omega

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“…The enhancement effect of 0.5 wt % SiO 2 −H 2 O nanofluids on the wettability of coal is highly persistent and stable. Afterward, Zou et al 42 explored the adsorption and sedimentation characteristics of SiO 2 NPs on the coal surface, laying the theoretical foundation for enhancing water injection in coal seams using nanofluids. Hence, SiO 2 −H 2 O nanofluids have huge engineering application potential in enhancing water injection in coal seams.…”

Section: Introductionmentioning

confidence: 99%

Study of Time-Varying Laws of Stability and Wettability of SiO₂–H₂O Nanofluids with Different Particle Sizes

Zhao,

Tian,

Xie

et al. 2023

Ind. Eng. Chem. Res.

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It has been proven that SiO2–H2O nanofluids have great application potential for water injection in coal seams. To explore the influences of the particle size on the stability and wettability of SiO2–H2O nanofluids, sedimentation observation of nanoparticles (NPs), viscosity tests, pH tests, surface tension tests, and contact angle tests were performed for SiO2–H2O nanofluids with different particle sizes. The research shows that the larger the particle size of SiO2 NPs, the more obvious the aggregation and sedimentation of NPs. The smaller the particle size of SiO2 NPs is, the lower the surface tension and contact angle of the SiO2–H2O nanofluids. As time goes on, SiO2–H2O nanofluids successively show time-varying characteristics in the low stability stage, moderate stability stage, and high stability stage. Therein, the low stability stage is the optimal period for enhancing the water injection in coal seams by nanofluids. The research provides theoretical support for using SiO2–H2O nanofluids to enhance water injection in coal seams.

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“…Coalbed methane is mainly extracted by water injection, where the water injection capacity is determined by the permeability of the coal formation. Many studies that have been conducted on the permeability of coal reservoirs show that the coal formation permeability is critical to the injection and seepage capacity of coal reservoirs. − The pore structure of the geological formations determined the degree of gas occurrence and seepage capacity of the formations. − Therefore, the coal pore structure after CO 2 injection is the main focus of CO 2 storage in coal seams. Many factors influence the coal pores after CO 2 injection.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies that have been conducted on the permeability of coal reservoirs show that the coal formation permeability is critical to the injection and seepage capacity of coal reservoirs. 11 − 13 The pore structure of the geological formations determined the degree of gas occurrence and seepage capacity of the formations. 14 − 17 Therefore, the coal pore structure after CO 2 injection is the main focus of CO 2 storage in coal seams.…”

Section: Introductionmentioning

confidence: 99%

Effects of Supercritical CO₂ on the Pore Structure Complexity of High-Rank Coal with Water Participation and the Implications for CO₂ ECBM

et al. 2023

ACS Omega

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To reveal how mineral changes affect a coal pore structure in the presence of water, an autoclave was used to carry out the supercritical CO2 (ScCO2)-H2O-coal interaction process. To reveal the changes in pore complexity, mercury intrusion capillary pressure (MICP), low-pressure nitrogen adsorption, CO2 adsorption, and field emission scanning electron microscopy (FESEM) experiments were combined with fractal theory. The experimental data of MICP show that the MICP data are meaningful only for the pore fractal dimension with pore sizes >150 nm. Therefore, the pores were classified into the classes >150, 2–150, and <2 nm. The results show that the pore volume and specific surface area of the coal increased significantly after the reaction. ScCO2-H2O can cause the formation of many new pores and fractures in the coal. The presence of H2O may increase the potential for the injection of CO2 into the coal seam. The complete dissolution of calcite surfaces caused a significant increase in the pore volume and specific surface area of the pores >150 nm. The morphologies of these pores are controlled by the morphologies of the complete dissolution carbonate particles. The pore morphologies were relatively uniform, and the fractal dimensions decreased. However, the incomplete dissolution of calcite leads to irregular variations in the morphologies for the pores in the 2–150 nm pore size range. The pore morphologies that are produced by incompletely dissolved calcite particles are more complex, which increases the fractal dimensions after the reaction. The fractal dimensions of the pores <2 nm decreased after the reaction, indicating that the newly generated micropores were more uniform and had regular pore morphologies.

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Surface deposition characteristics of water-based SiO2 nanofluids on coal

Cited by 23 publications

References 39 publications

Study on the Water Absorption Characteristics of Anthracite Particles after Immersion in Water

Study on the Water Absorption Characteristics of Anthracite Particles after Immersion in Water

Study of Time-Varying Laws of Stability and Wettability of SiO₂–H₂O Nanofluids with Different Particle Sizes

Effects of Supercritical CO₂ on the Pore Structure Complexity of High-Rank Coal with Water Participation and the Implications for CO₂ ECBM

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Surface deposition characteristics of water-based SiO2 nanofluids on coal

Cited by 23 publications

References 39 publications

Study on the Water Absorption Characteristics of Anthracite Particles after Immersion in Water

Study on the Water Absorption Characteristics of Anthracite Particles after Immersion in Water

Study of Time-Varying Laws of Stability and Wettability of SiO2–H2O Nanofluids with Different Particle Sizes

Effects of Supercritical CO2 on the Pore Structure Complexity of High-Rank Coal with Water Participation and the Implications for CO2 ECBM

Contact Info

Product

Resources

About

Study of Time-Varying Laws of Stability and Wettability of SiO₂–H₂O Nanofluids with Different Particle Sizes

Effects of Supercritical CO₂ on the Pore Structure Complexity of High-Rank Coal with Water Participation and the Implications for CO₂ ECBM