Deep seam and minesoil carbon sequestration potential of the South Wales Coalfield, UK

Abstract

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

“…The low-rank wet powder samples of low density were obtained. (7) The samples sunk at the bottom of the bottle were collected. 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.…”

“…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.…”

“…Because the study of pore structure and adsorption capacity of coal macerals can more accurately predict the carbon dioxide storage capacity of coal reservoirs, the CBM content and production characteristic, and the coal mine gas outburst potential, ,, it is necessary to study the pore and adsorption properties of coal maceral groups, so as to achieve the purpose of greenhouse gas control, carbon emission reduction, and gas outburst accident. , In addition, despite that a large number of studies about the pore structure of coal have been published, little is known about how the maceral groups of different coal ranks and particle sizes affect the distribution of pore structure and the thermodynamic properties.…”

“…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.…”

Trends of Global Scientific Research on Reclaimed Coal Mine Sites between 2015 and 2020

“…Keeping in mind that soil organic matter (SOM) is one of the segments that is most drastically impacted by open-cast coal mining, and its physical, chemical, and biological properties and functions are deeply interrelated, as well as the fact that it is an unavoidable and very abundant component of much modern soil RMS research, a section of its own is called for. Soil organic carbon (SOC) research, as well as the capability of certain soils to sequester it, is becoming more and more abundant in recent years [13][14][15][16][17][18][19][20]. Since nutrients, most commonly nitrogen, are often investigated together with soil carbon, sometimes it is difficult to divide these as well.…”