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April 7, 2026Scientific ReportsOpen Access

Pore structure of deep high-rank coal and its impact on coalbed methane adsorption: a case study of the Daning-Jixian block, Eastern Ordos Basin

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Authors

HCHaonan ChenHWHailong WangJFJing Fan

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Overview

Demonstrates the relationship between pore structure and methane adsorption in deep coal, suggesting avenues for resource evaluation.

Key Points

  • The study aims to evaluate how the pore structure of deep coal affects coalbed methane adsorption capacity.
  • Characterized the nano-scale pore structure using CO2 and N2 adsorption experiments.
  • Applied volume-specific surface area and fractal models to analyze pore characteristics.
  • Conducted CH4 isothermal adsorption experiments to assess methane adsorption control factors.
  • Deep coal samples reach a thermal evolution degree of Ro max 2.44% indicating high rank coal.
  • Significant micropore development with coasted CO₂ adsorption capacity of 17.52 cm³/g.
  • Strong CH₄ adsorption with an average Langmuir volume of 28.77 cm³/g.
  • Average pore fractal dimensions were significant, with DC at 2.4686, and surface fractal dimensions DN−1 at 2.5943, DN−2 at 2.7202.
  • A strong positive correlation exists between Langmuir volume and pore fractal dimension DC.

Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/69d49fc5b33cc4c35a22845bhttps://doi.org/10.1038/s41598-026-47379-9
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Also Consider

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  1. 1Geological characteristics and exploration breakthroughs of coal rock gas in Carboniferous Benxi Formation, Ordos Basin, NW China2024 · 85 citations
  2. 2Coal Pores: Methods, Types, and Characteristics2021 · 142 citations
  3. 3The Characteristic Development of Micropores in Deep Coal and Its Relationship with Adsorption Capacity on the Eastern Margin of the Ordos Basin, China2023 · 39 citations