Nanopore Structural Characteristics and Their Impact on Methane Adsorption and Diffusion in Low to Medium Tectonically Deformed Coals: Case Study in the Huaibei Coal Field
作者： Song Yu , Jiang Bo , Liu Jie-gang
DOI: 10.1021/ACS.ENERGYFUELS.7B00512
关键词:
摘要: Coupled with isothermal adsorption and the Steele potential function, characteristics of nanopores their impact on methane diffusion in low- to medium-rank tectonically deformed coals (TDCs) were revealed by high-pressure mercury intrusion low-pressure N2/CO2 gas adsorption. The specific surface area (SSA) low medium TDCs is mainly provided micropores ( 50 nm, 99.68–99.91%). fractal can be divided into four groups, i.e., D1 (>100 nm), D2 8 D4 D2, indicating that heterogeneity seepage pores stronger than pores. For scaly coals, ≈ D1, demonstrating close connectivity pores, which are beneficial for coalbed (CBM) desorption diffusion. However, > wrinkle mylonitic indicati...
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