Role of pore irregularity in methane desorption capacity of coking coal

Liu, Xianfeng; Wang, Longkang; Kong, Xiangguo; Ma, Zhengtao; Nie, Baisheng; Song, Dazhao; Yang, Tao

doi:10.1016/j.fuel.2021.123037

Cited by 45 publications

(32 citation statements)

References 71 publications

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“…In 2021, the State Council of China issued the “Working Guidance for Carbon Dioxide Peaking and Carbon Neutrality in Full and Faithful Implementation of the New Development Philosophy” and the “Action Plan for Carbon Dioxide Peaking Before 2030“. Both plans mentioned the need to accelerate the large-scale development of unconventional oil and gas resources such as coalbed methane [ 24 ].…”

Section: Recovery and Utilization Technology Of Coal Mine Chmentioning

confidence: 99%

Analysis of the Characteristics of CH4 Emissions in China’s Coal Mining Industry and Research on Emission Reduction Measures

An-yu

Wang

Liu

et al. 2022

IJERPH

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CH4 is the second-largest greenhouse gas and has a significant impact on global warming. China has the largest amount of anthropogenic coal mine methane (CMM) emissions in the world, with coal mining emissions (or gas emissions) accounting for 90% of total energy industry emissions. The results of CH4 emission inventories from previous studies vary widely, with differences in the spatial and temporal dimensions of gas emission factors of belowground mining being the main points of disagreement. Affected by the policies of “eliminating backward production capacity” and “transferring energy base to the northwest”, China’s coal production layout has changed greatly in the past ten years, but the closely related CH4 emission factors have not been dynamically adjusted. This paper investigated 23 major coal producing provinces in China, obtained CH4 emission data from coal mining, calculated CH4 emission factors in line with current production conditions, and studied the reduction measures of coal mine gas emission. According to the CH4 emission data of China’s coal mines in 2018, 15.8 Tg of methane is released per year in the coal mining industry in China, and 11.8 Tg after deducting recycling. Shanxi Province’s CH4 emissions are much higher than those of other provinces, accounting for 35.5% of the country’s total emissions. The weighted CH4 emission factor of coal mining in China is 6.77 m3/t, of which Chongqing is the highest at approximately 60.9 m3/t. Compared with the predicted value of the IPCC, the growth trend of CCM has slowed significantly, and the CH4 utilization rate has gradually increased. This change may be aided by China’s coal industry’s policy to resolve excess capacity by closing many high-gas and gas outburst coal mines. In addition, the improvement of coal mine gas extraction and utilization technology has also produced a relatively significant effect. This paper determines the distribution of methane emissions and emission sources in China’s coal mining industry, which is useful in formulating CCM emission reduction targets and adopting more efficient measures.

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Section: Recovery and Utilization Technology Of Coal Mine Chmentioning

confidence: 99%

Analysis of the Characteristics of CH4 Emissions in China’s Coal Mining Industry and Research on Emission Reduction Measures

An-yu

Wang

Liu

et al. 2022

IJERPH

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“…According to the latest assessment of CBM resources in China, the gas in place for CBM in the coal between 1000 m and 2000 m is approximately 22.5 × 10 12 m 3 , occupying 61.1% of the total CBM reserves (Shen et al, 2016). As the processive depletion of shallow CBM resources, the exploration and exploitation of CBM have gradually turned into deep coal seams (Liao et al, 2021; Liu et al, 2022; Xu et al, 2012), which thus will be the development trend of CBM will be the development trend of coalbed methane in the future in the future (Liu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of deep high-rank coal seam gas content and favorable area division based on GIS: A case study of the South Yanchuan block in Ordos Basin

Cao

Cui³

et al. 2022

Energy Exploration & Exploitation

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The South Yanchuan block is the deepest developed high-rank coalbed methane (CBM) field in China, the geological conditions in this block are complex and the main controlling factors of CBM content are various. Thus, a decision-making model of the potential of deep high-rank coalbed methane resource based on geographical information system (GIS) and weighted linear combination (WLC) is established, the influence of geological conditions on CBM content is analyzed, the favorable areas of CBM potential are divided. Results show that the buried depth, coal rank and hydrodynamic condition in the coal seam are dominant factors that control the gas content on a block scale, while the gas content has a weak correlation with maceral composition, coal thickness and the effective thickness of the overlying strata. The study area is divided into five units according to the natural breaks method, i.e., the extramely favourable area, the favourable area, the relatively favourable area, the normally favourable area and the unfavourable area, which account for 14.23%, 22.23%, 24.77%, 25.08% and 13.70% in area, respectively. The extramely favourable area is located in the northwestern of the South Yanchuan block, which is considered to be the key exploration and development area. The study will deepen the understanding of the control of CBM potential in south Yanchuan Block, and is of practical significance for CBM recovery in this area.

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“…Wang used mathematical statistics, literature analysis, well logging, hydrochemical analysis, and other methods to summarize the research status and development trend of the influence of hydrogeology on CBM . Ye analyzed the relationship among the structure (Pan et al, 2019), micro-pores (Liu X. F. et al, 2022), micro-cracks (Zhang et al, 2021a), and CBM content (Ma Y. K. et al, 2020;Lu et al, 2021), which is of great significance for the optimal selection of CBM production areas (Niu et al, 2019;Ye et al, 2019;Zhou et al, 2021). Sinha took a mine in India as an example to study the geological model of the CBM-enhanced recovery process (Sinha and Gupta, 2021).…”

Section: Introductionmentioning

confidence: 99%

Influence of geological structures on the occurrence of coalbed methane in Sima coal mine, China

Zhang

et al. 2022

Front. Earth Sci.

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Geological structures of Sima coal mine in Shanxi Province were analyzed to understand the control effect of the geological structures on the occurrence of coalbed methane (CBM) in coal seam #3 of Sima coal mine. The CBM contents in the districts #2 and #3 of Sima coal mine were tested, and the effects of buried depth, fault and collapse column on the distribution of coalbed methane content are studied. The research results showed that: 1) The average content of CBM has a linear relationship with buried depth and overburden thickness, but in the smallscale range of buried depth, the dispersion between CBM and buried depth is very large. 2) Faults and collapse columns significantly affect the content of local CBM nearby, but from the largescale range such as the whole mining area, the average value of CBM content at a certain buried depth will not be affected by faults and collapse columns. 3) In the hanging wall of F29 normal fault, it is roughly estimated that the average escape rate of CBM near the fault is 13.9%, while in the footwall of F29 normal fault, this value is 0.7%–1.1%. The results show that there is a significant difference in the influence of the fault on the CBM content in the hanging wall and footwall. 4) The control effect of collapse column on CBM occurrence is related to the development height of collapse column, the cementation degree of collapse column, groundwater runoff conditions and other factors. It can be divided into three categories: aggregation action, escape action (such as collapse column X8) and no obvious effect (such as collapse column DX7).

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Role of pore irregularity in methane desorption capacity of coking coal

Cited by 45 publications

References 71 publications

Analysis of the Characteristics of CH4 Emissions in China’s Coal Mining Industry and Research on Emission Reduction Measures

Analysis of the Characteristics of CH4 Emissions in China’s Coal Mining Industry and Research on Emission Reduction Measures

Evaluation of deep high-rank coal seam gas content and favorable area division based on GIS: A case study of the South Yanchuan block in Ordos Basin

Influence of geological structures on the occurrence of coalbed methane in Sima coal mine, China

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