CO2 storage capacity of anthracite coal in deep burial depth conditions and its potential uncertainty analysis: a case study of the No. 3 coal seam in the Zhengzhuang Block in Qinshui Basin, China

Xu, Hongjie; Sang, Shuxun; Yang, Jingfen; Liu, Huihu

doi:10.1007/s12303-020-0058-z

Cited by 11 publications

(10 citation statements)

References 55 publications

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“…Steps 3−6 were repeated using a heavy liquid with a density of 1.39 g/cm 3 to obtain low-rank coal samples of medium density and high density. (8) Steps 2−7 were repeated to obtain the low-, medium-, and high-density powdered samples for low-, medium-, and high-rank coal samples with different powder sizes, respectively (Figure 2a). (9) The wet samples were dried in a vacuum oven for 12 h at a temperature of 378.15 K to prepare them for pore structure and isotherm adsorption experiments.…”

Section: Methods 221 Methodology Of the Centrifugal Flotationmentioning

confidence: 99%

“…In recent years, all kinds of environmental problems caused by the greenhouse effect have emerged frequently. , Countries around the world are actively responding to them and putting forward measures, such as carbon capture, utilization, and storage (CCUS), , to reduce global carbon emissions. , CO 2 geological sequestration can be stored into brine aquifers, deep ocean, depleted oil and gas reservoirs, deep coal seams, and so on. Among the carbon dioxide storage sites, deep coal seams are regarded as one of the potential sites. , Carbon sequestration in coal seam can improve coalbed methane (CBM) recovery, prevent coal mine gas outburst accidents, − and further realize the strategic planning of net-zero carbon emission, , which has been paid more and more attention. The storage of carbon dioxide in coal, the development of CBM, and coal mine gas outburst accidents are all related to the adsorption characteristics of coal. − At present, the adsorption characteristics of coal on gas, such as carbon dioxide, methane, nitrogen, and flue gas, have been deeply studied and the related results can be divided into two main categories.…”

Section: Introductionmentioning

confidence: 99%

“…Among the carbon dioxide storage sites, deep coal seams are regarded as one of the potential sites. 7 , 8 Carbon sequestration in coal seam can improve coalbed methane (CBM) recovery, 9 prevent coal mine gas outburst accidents, 10 − 12 and further realize the strategic planning of net-zero carbon emission, 13 , 14 which has been paid more and more attention. The storage of carbon dioxide in coal, the development of CBM, and coal mine gas outburst accidents are all related to the adsorption characteristics of coal.…”

Section: Introductionmentioning

confidence: 99%

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Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

et al. 2023

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Coal has various types of macerals, which have different pore structures and adsorption properties that change with coal’s thermal metamorphism. In-depth study of the characteristics of different coal macerals, especially the pore structure and adsorption properties, can better predict the coal reservoir gas storage capacity and migration ability. In this study, the sub-samples enriched in a specific maceral group with different coal ranks and particle sizes were obtained by centrifugal flotation experiments. Then, experiments containing low-temperature N2 isotherm adsorption (LT-N2GA), low-temperature CO2 isotherm adsorption (LT-CO2GA), and methane isothermal adsorption were carried out on the sub-samples to quantitatively analyze the evolution characteristics of pore structure and adsorption properties of different maceral groups. The results showed the following: (1) The separation effect of the light maceral groups by centrifugal flotation experiments increased with the decrease of particle sizes, which were treated with the heavy liquid of low and medium densities, while that of the heavy maceral groups had the relatively best separation effect in the particle sizes of 0.1–0.125 mm, which were treated with the heavy liquid of high densities. (2) The vitrinite-enriched samples had more ultra-micropores (mainly within the diameter range of 0.4–0.65 nm), while the inertinite enriched samples had more mesopores and transition pores (mainly within the diameter range of 40–50 nm). (3) For the low-rank coal, inertinite had more potential methane adsorption capacity. However, for the medium- and high-rank coal, vitrinite had more potential methane adsorption capacity. (4) For the low-rank coal, the adsorption potential and adsorption space increased with the increase of the inertinite content, while the adsorption potential, adsorption space, and surface free energy for the medium- and high-rank coal increased with the increase of vitrinite content. It is expected that the results can deepen the understanding about the gas storage capacity and migration ability and be used in the prevention of gas outburst and the reduction of carbon emission.

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Section: Methods 221 Methodology Of the Centrifugal Flotationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

et al. 2023

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“…Also, ref established a mathematical model to estimate the storage capacity of anthracite coal seams in the Qinshui Basin, Shanxi Province, in north China. The developed mathematical model considered three storage mechanisms: gas adsorbed in the coal matrix, free gas in the pores and fractures, and gas soluble in water.…”

Section: Estimation Of Co2 Storage Capacity In Deep Unmineable Coal S...mentioning

confidence: 99%

Recent Advances in Carbon Dioxide Sequestration in Deep Unmineable Coal Seams Using CO₂-ECBM Technology: Experimental Studies, Simulation, and Field Applications

Mwakipunda,

Wang,

Mgimba

et al. 2023

Energy Fuels

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CO 2 -enhanced coalbed methane (CO 2 -ECBM) technology helps to store CO 2 while producing a clean source of energy (CH 4 ) through the sorption process. This technique can sequester much CO 2 at low temperatures and pressures while recovering CH 4 , which will help offset the associated costs, such as capturing injection gases, drilling and completion infrastructure, compression, and injection expenses. This review paper critically analyzes the CO 2 sequestration potentiality in deep unmineable coal seams. The results revealed that, despite several researchers' insights from proposed concepts, experimental data, modeling and simulations, and pilot tests, there are no reported full field CO 2 -ECBM technology applications for CO 2 sequestration and CH 4 recovery because implementing the projects is uneconomical. Also, CO 2 sequestration and CH 4 recovery effectiveness on coal seams depend on wettability changes of the CO 2 −H 2 O−coal system. The identified research gaps and challenges in this paper are going to help various researchers and shareholders in conducting extra investigations toward full field application of CO 2 sequestration while simultaneously producing a clean source of energy (CH 4 ) in deep unmineable coal seams to meet the Paris climate summit agreement to achieve net zero emissions by 2050 and a maximum global temperature rise of 1.5 °C.

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“…China, a country where over 95% of coal mines are recovered by means of underground mining [1][2][3][4], is suffering the most serious coal and gas outburst disasters in the world [5][6][7]. It contains a large number of outburst coal mines where outburst disasters occur intensely and frequently [8]. Lowpermeability coal seams where gas can hardly be drained refer to the coal seams whose permeability λ is smaller than 0.1 m 2 /(MPa 2 •d) [9], and soft coal seams refer to the coal seams whose hardness coefficient f is smaller than 1 [10].…”

Section: Introductionmentioning

confidence: 99%

Analysis on the Shape and Impact Pressure of the High-Pressure Water Jet during the Hydraulic Flushing Cavity Technique

Wang

Wei

et al. 2021

Geofluids

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A large proportion of minable coal seams in China belong to low-permeability soft coal seams. Such coal seams suffer serious coal and gas outburst hazards and endure a high incidence of major disasters in coal mines. The adoption of the high-pressure water jet (HPWJ) hydraulic flushing cavity can effectively promote the gas drainage efficiency and volume and eliminate the hidden danger of gas disasters. Nevertheless, the shape and impact pressure of rotating HPWJ are rarely researched. In this study, on the basis of the numerical simulation, the axial and radial stress distributions of HPWJ and the energy-gathering effect of a conical-cylindrical combined nozzle were analyzed. It is concluded that the submerged condition will accelerate the attenuation of jet velocity and reduce the impact strength of the jet. The jet diffusion angle grows with the increases in the nozzle diameter and water pressure, and 24° is the optimal contraction angle. Finally, the influences of factors such as the rotation speed on the shape and impact pressure of HPWJ were explored, and the results show that the rotation speed should be controlled within 90 r/min. The research findings lay the foundation of the study on the mechanism of coal crushing by HPWJ and provide technical support for the research and development of drilling and flushing integrated equipment.

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CO2 storage capacity of anthracite coal in deep burial depth conditions and its potential uncertainty analysis: a case study of the No. 3 coal seam in the Zhengzhuang Block in Qinshui Basin, China

Cited by 11 publications

References 55 publications

Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

Recent Advances in Carbon Dioxide Sequestration in Deep Unmineable Coal Seams Using CO₂-ECBM Technology: Experimental Studies, Simulation, and Field Applications

Analysis on the Shape and Impact Pressure of the High-Pressure Water Jet during the Hydraulic Flushing Cavity Technique

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CO2 storage capacity of anthracite coal in deep burial depth conditions and its potential uncertainty analysis: a case study of the No. 3 coal seam in the Zhengzhuang Block in Qinshui Basin, China

Cited by 11 publications

References 55 publications

Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

Recent Advances in Carbon Dioxide Sequestration in Deep Unmineable Coal Seams Using CO2-ECBM Technology: Experimental Studies, Simulation, and Field Applications

Analysis on the Shape and Impact Pressure of the High-Pressure Water Jet during the Hydraulic Flushing Cavity Technique

Contact Info

Product

Resources

About

Recent Advances in Carbon Dioxide Sequestration in Deep Unmineable Coal Seams Using CO₂-ECBM Technology: Experimental Studies, Simulation, and Field Applications