Study on the evolution of solid–liquid–gas in multi-scale pore methane in tectonic coal

作     者：Junjie Cai Xijian Li Hao Sui Honggao Xie Junjie Cai;Xijian Li;Hao Sui;Honggao Xie

作者机构：College of Resources and Environmental EngineeringGuizhou UniversityGuiyang 550025China Mining CollegeGuizhou UniversityGuiyang 550025China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2024年第71卷第7期

页      面：122-131页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：supported by the National Natural Science Foundation of China(52164015) the Technology Funding Projects of Guizhou Province(231) 

主　　题：Tectonic coal Multiscale pore structure Methane adsorption Micropore filling Monolayer Molecular simulation 

摘      要：The rich accumulation of methane(CH_(4))in tectonic coal layers poses a significant obstacle to the safe and efficient extraction of coal seams and coalbed *** coal samples from three geologically complex regions were selected,and the main results obtained by using a variety of research tools,such as physical tests,theoretical analyses,and numerical simulations,are as follows:22.4–62.5 nm is the joint segment of pore volume,and 26.7–100.7 nm is the joint segment of pore specific surface *** the dynamic gas production process of tectonic coal pore structure,the adsorption method of methane molecules is“solid–liquid adsorption is the mainstay,and solid–gas adsorption coexists.Methane stored in micropores with a pore size smaller than the jointed range is defined as solid-state *** within the jointed range,which transition from micropore filling to surface adsorption,are defined as gaseous *** outside the jointed range,where solid–liquid adsorption occurs,are defined as liquid *** evolution of pore structure affects the methane adsorption mode,which provides basic theoretical guidance for the development of coal seam resources.