Relationship between Maceral of Coal and Coal-bed Methane adsorption ability in Sihe Coalmine of Qinshui Basin, China

Wang, M. S.; Zou, Guangui; Zhu, Ran

doi:10.1088/1757-899x/359/1/012026

Cited by 2 publications

(6 citation statements)

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“…Content of vitrinite controls adsorption capacity of coalbed for low-medium coal and for high-rank coal, fusinite had more control over adsorption capacity of coalbed (Zhang et al., 2017). Content of vitrinite of anthracite from Sihe Ming, Qinshui Basin, China had negative correlation with the adsorption capacity of coalbed methane, while its content of inertinite had positive correlation with the adsorption capacity (Wang et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Micropore-rich structure of inertinite destined it had the strong adsorption capacity in early coalification. Inertinite had higher proportion of pore, which was because fusinite developed more prominent three-dimensional space network and plenty of incompletely filled biogenetic texture pores, which contributed a lot to the adsorption capacity of methane (Wang et al., 2018; Zhang et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…More than 80% of coalbed methane exists in coal with adsorbed state (Chang et al, 2015;Qin, 2003;Qin and Shen, 2016). Factors affecting adsorption capacity of coalbed methane include properties of adsorbent medium, such as component, texture, structure and moisture content of coal (Bustin et al, 1995;Gayer and Harris, 1996;Li, 2018;Liu et al, 2014;Singh, 2011;Wang et al, 2004Wang et al, , 2018Wen, 2007;Zhang et al, 2015;Zhong and Zhang, 1990), and geological conditions of adsorbent medium, such as temperature and pressure (Liu, 2018;Zhang, 2018;Zhong, 2004). In these factors, maceral composition of coal dominates adsorption capacity of coalbed methane.…”

Section: Introductionmentioning

confidence: 99%

“…Research on the influence of maceral compositions to the adsorption capacity of coalbed methane started from 1960s and continues today. Some authors find that inertinite has better adsorption capacity (Ettinger et al, 1966;Faiz and Cook, 1991;Fu et al, 2005;Wang et al, 2018;Zhang et al, 2018), while other authors argue that vitrinite has better adsorption capacity (Fu et al, 2002;Levine et al, 1993;Zhong and Zhang, 1990). Some researchers think that adsorption capacity of vitrinite and inertinite is different at different pressure or Langmuir volume (Bustin et al, 1995;Crosdale et al, 1998;Kadlec, 2001), while other researchers consider that adsorption capacity does not have certain correlation with vitrinite or inertinite (Chalmers and Bustin, 2008;Laxminarayana and Crosdale, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Coalbed methane adsorption capacity related to maceral compositions

Liu

Jin

et al. 2019

Energy Exploration & Exploitation

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Maceral compositions take a great role in coalbed methane adsorption. Two controversial viewpoints coexist on the effect of maceral compositions to coalbed methane adsorption. One is vitrinite has better adsorption capacity than inertinite and the other is inertinite has enhanced adsorption capacity than vitrinite. In order to clarify this issue, a series of coal samples were collected and highly purified vitrinite and inertinite concentrates were gained by heavy-fluid flotation and centrifugal separation. Isothermal adsorption experiments of methane were performed to these concentrates with equilibrium moisture and their ultimate adsorption volume were obtained finally. The results show that the adsorption capacity of vitrinite is weaker and the capacity of inertinite is stronger for low-rank coal. For high-rank coal, the adsorption capacity of vitrinite is stronger and the capacity of inertinite is weaker. Along with the increase of coal rank, the adsorption capacity of vitrinite rises gradually and the adsorption capacity of inertinite declines little by little. This result shows that the adsorption capacity of coal to methane not only relates to contents of vitrinite and inertinite, but also relates to metamorphic grade of the coal, because with the increase of metamorphism of coal, molecular structure, functional group and pore characteristic of vitrinite and inertinite change gradually, which results in tremendous changes in the adsorption capacity of coal.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coalbed methane adsorption capacity related to maceral compositions

Liu

Jin

et al. 2019

Energy Exploration & Exploitation

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“…It is contrary to what was observed with the percentage of Vitrinite with a high degree of metamorphism that does not allow filling the pores with gas. (e.g., Mares and Moore 2008;Wang 2018).…”

Section: Relation Between Measured Gas Content and The Inertinite Groupmentioning

confidence: 99%

Maceral study to determine the desorbed gas content in the Upper Cretaceous coals of the Landázuri area, Middle Magdalena Valley Basin, Colombia

Guatame

Rincón

Bermúdez

2021

Preprint

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For several decades, some coal petrographic properties have been proposed as important parameters in the methane gas sorption processes. In this contribution, the petrographic variables (Vitrinite Ratio, Inertinite Ratio, the petrographic indexes (Gelification Index, Groundwater Index, Tissue Preservation Index, Vegetation Index, Vitrinite/Inertinite ratio, and the Vitrinite Reflectance were evaluated according to the maceral preservation and were related with the desorbed gas content. Twenty-five coal seams obtained from the drill cores of two wells in the Landázuri Area-Valle Medio del Magdalena basin were analyzed. The coal samples were grouped according to gas content using principal component analysis (PCA). The petrographic results were analyzed by linear regression and multiple regression. The Medium Volatile Bituminous to Low Volatile Bituminous coals from Landázuri 1 are twice as high in gas content that the High Volatile Bituminous A to Medium Volatile Bituminous coals from Landázuri 2. The volume percentage and the preservation degree macerals are related closely to the gas content and the pore's size involved in the sorption process. The Inertinite is the maceral group related with the highest gas content groups in Landázuri (600 SCF-Standard Cubic Feet/ton, 300 SCF/ton), while the other groups show the correspondence with the vitrinite macerals. The syngenetic and diagenetic origin of the pyrite contributes microporosity to the desorption process, while the pyrite epigenetic by its size reduces it. The petrographic indexes reveal that the Upper Cretaceous coals were developed in swampy or lacustrine continental basins- limnic facies.

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Relationship between Maceral of Coal and Coal-bed Methane adsorption ability in Sihe Coalmine of Qinshui Basin, China

Cited by 2 publications

References 1 publication

Coalbed methane adsorption capacity related to maceral compositions

Coalbed methane adsorption capacity related to maceral compositions

Maceral study to determine the desorbed gas content in the Upper Cretaceous coals of the Landázuri area, Middle Magdalena Valley Basin, Colombia

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