Relationship between multiscale nanopore structure and coal connectivity during coalification process

The complex nanopore structures in coal provide the space for gas adsorption and migration, which is crucial for the development of coalbed methane. However, the mechanism of the evolution of multi-scale nanopore structures during coalification is still unclear. In this work, a combined method of CO...

Full description

Saved in:
Bibliographic Details
Published in:Microporous and mesoporous materials 2023-10, Vol.360, p.112717, Article 112717
Main Authors: Shen, Zhen, Meng, Zhaoping, Liu, Yu, Lei, Junhuan, Shen, Weijun, Ren, Huaxin, Gao, Tengwei, Zhang, Kun, Wang, Yuheng, Tan, Libo
Format: Article
Language:English
Subjects:
Coalification
Permeability
Pore size
Porosity
Volume
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The complex nanopore structures in coal provide the space for gas adsorption and migration, which is crucial for the development of coalbed methane. However, the mechanism of the evolution of multi-scale nanopore structures during coalification is still unclear. In this work, a combined method of CO2/N2 adsorption and synchrotron radiation Nano-CT experiments were used to reveal the multi-scale pore structure characterization during coalification. The synchrotron radiation Nano-CT experiment reconstructed the 3D pore network model for different rank coal and revealed the effective diameter is less than 0.5 μm, accounting for 97.4%–99.6% of the total number of macropores. The combination of these methods, including CO2/N2 adsorption and Nano-CT, accurately characterizes the multi-scale pore distribution in coal, ranging from
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2023.112717