Gas adsorption analysis of pore structure differences and influencing factors in coal with varying metamorphic grades

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 6, 2025

The heterogeneity structural characteristics of the pores in coal matrix largely determine storage and transport capacity gas. In order to quantitatively characterize pore structure analyze influencing factors, filled (0.38-1.5 nm) diffusion (1.5-100 seven samples with different metamorphic degrees were measured by low-temperature liquid nitrogen adsorption carbon dioxide experiments, combined theory multifractality, adsorbed metamorphism characterized discussed. multiple fractal factors results show that both have characteristics; more metamorphism, developed stronger heterogeneity. High-order coals had a strong pores, while low-order exhibited pores. was negatively correlated specific surface area volume, opposite true for relationship between fixed content showed "U" distribution.

Language: Английский

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Complex interactions between coal maceral fractions, thermal maturity, reaction kinetics, fractal dimensions and pore-size distributions: Implications for gas storage

International Journal of Coal Geology, Journal Year: 2025, Volume and Issue: unknown, P. 104788 - 104788

Published: April 1, 2025

Language: Английский

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