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Processes
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Adsorption and Pore Structure Analysis in Coalbed Methane and Gas...
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Adsorption and Pore Structure Analysis in Coalbed Methane and Gas Recovery

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: 30 March 2026 | Viewed by 424

Special Issue Editors

Dr. Hexin Huang

E-Mail Website
Guest Editor
School of Earth Science and Resources, Chang'an University, Xi’an 710054, China
Interests: oil and gas potential evaluation of fine-grained sedimentary systems; petroleum geology
Special Issues, Collections and Topics in MDPI journals
Dr. Wenming Ji

E-Mail Website
Guest Editor
School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China
Interests: petroleum geology; shale oil and gas geology; unconventional reservoir characterization
Special Issues, Collections and Topics in MDPI journals
Dr. Zhikai Liang

E-Mail Website
Guest Editor
School of Geosciences, Yangtze University, Wuhan 434023, China
Interests: shale gas; coalbed methane; adsorption; molecular simulation; organic matter

Special Issue Information

Dear Colleagues,

Coalbed methane (CBM), as an unconventional clean energy source, is a key resource for alleviating conventional energy shortages and advancing the “dual-carbon” goals; its efficient development is of strategic significance for ensuring energy security. Owing to the complex pore-structure characteristics of coal reservoirs, methane occurrence and transport are distinctly multiscale. The occurrence, migration, and efficient recovery of methane in coal reservoirs fundamentally depend on the adsorption properties and pore-structure characteristics of coal, forming the key point of CBM development efficiency. Currently, efficient exploration and development require advanced technologies; in particular, challenges remain in stimulating low-permeability, complex coal reservoirs and enhancing gas desorption from the coal system. There is an urgent need for precise characterization of pore structure and elucidation of adsorption mechanisms under multi-factor coupling, to establish a tailored theoretical framework for development.

This Special Issue, “Adsorption and Pore Structure Analysis in Coalbed Methane and Gas Recovery,” aims to address the critical challenges in CBM exploration and development and to promote progress in the field.

Dr. Hexin Huang
Dr. Wenming Ji
Dr. Zhikai Liang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • coalbed methane
  • gas adsorption mechanism
  • pore structure characterization
  • pore size distribution
  • geological engineering
  • gas recovery efficiency
  • adsorption thermodynamics
  • adsorption kinetics

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Published Papers (1 paper)

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Research

19 pages, 5060 KB  
Article
Fractal Characteristics of Multi-Scale Pore Structure of Coal Measure Shales in the Wuxiang Block, Qinshui Basin
by Rui Wang and Mengyu Zhao
Processes 2025, 13(10), 3214; https://doi.org/10.3390/pr13103214 - 9 Oct 2025
Viewed by 317
Abstract
Due to the diverse origins of shale reservoirs, the coal measure shales of the Wuxiang block, Qinshui Basin typically exhibit fractal pore structures, which significantly influence shale gas occurrence and migration. Clarifying the fractal nature of pore structures is significant for the efficient [...] Read more.
Due to the diverse origins of shale reservoirs, the coal measure shales of the Wuxiang block, Qinshui Basin typically exhibit fractal pore structures, which significantly influence shale gas occurrence and migration. Clarifying the fractal nature of pore structures is significant for the efficient development and utilization of shale gas. In this study, mercury intrusion porosimetry and liquid nitrogen adsorption experiments were conducted to develop a method that integrates pore compressibility correction and nitrogen adsorption for pore structure characterization. On this basis, this study analyzed the fractal characteristics of coal measure shale pore structures across multiple scales. The results reveal that coal measure shale pores exhibit a three-stage fractal pattern, consisting of three regions with pore diameters >65 nm (seepage pores), 6–65 nm (transition pores), and <6 nm (micropores). Samples with fractal dimensions of seepage pores (Da) exceeding 2.9 and transition pores (D1) exceeding 2.5 tend to have larger specific surface areas and more complex pore structures; this is indicated by the increased surface roughness of large-scale pores, which hinders gas seepage. Samples with lower fractal dimension of micropores (D2)—in the range of 2.2–2.8—exhibit higher micropore development, larger specific surface area, and simpler pore structures, as demonstrated by a greater number of micropores and a more uniform pore distribution, which promotes gas adsorption. Full article
(This article belongs to the Special Issue Adsorption and Pore Structure Analysis in Coalbed Methane and Gas Recovery)
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