Volume 50 Issue 7
Jul.  2024
Turn off MathJax
Article Contents
Article Navigation >  Journal of Mine Automation  > 2024  >  50(7): 147-155
ZHANG Liming, LIN Jianyun, SI Leilei, et al. Features of adsorption pore structure in high-rank coal and its influence on methane adsorption capability[J]. Journal of Mine Automation，2024，50（7）：147-155.  doi: 10.13272/j.issn.1671-251x.2024040083
Citation: ZHANG Liming, LIN Jianyun, SI Leilei, et al. Features of adsorption pore structure in high-rank coal and its influence on methane adsorption capability[J]. Journal of Mine Automation，2024，50（7）：147-155.  doi: 10.13272/j.issn.1671-251x.2024040083
shu

Features of adsorption pore structure in high-rank coal and its influence on methane adsorption capability

doi: 10.13272/j.issn.1671-251x.2024040083
  • 1.

    Mining College, Guizhou University, Guiyang 550025, China

  • 2.

    Guizhou Xing'an Coal Industry Co., Ltd., Xingyi 561504, China

  • Received Date: 2024-04-24
  • Rev Recd Date: 2024-07-23
    • Available Online: 2024-08-01
    Abstract
  • The pore structure has a significant impact on the capability of coal seams to adsorb methane. But there is currently limited research on the features of adsorption pore structure in high-rank coal and its influence on methane adsorption capability. Taking the high-rank coal samples from Nuodong Coal Mine of Guizhou Xing'an Coal Industry Co., Ltd. as the research object, low-temperature N2 adsorption and low-temperature CO2 adsorption experiments are conducted. Combined with fractal theory, this paper studies the pore structure features of high-rank coal adsorption pores. Through high-pressure isothermal methane adsorption experiments, the influence of coal reservoir properties, pore structure features, and fractal dimension on methane adsorption capability is analyzed. The results show the following points. ① The pore morphology of high-rank coal reservoirs is relatively simple, mostly consisting of parallel plate pores and narrow slit pores with open ends. Micro pores dominate the pore structure of coal, with pore volume and pore specific surface area accounting for more than 98%, providing space for gas enrichment. ② The method calculates the comprehensive fractal dimension of high-rank coal pores based on the proportion of pore volume in different aperture segments, with micropore fractal dimension dominating the comprehensive fractal dimension. The pore structure of coal samples has obvious fractal features and strong heterogeneity of pores. ③ The Langmuir model can describe the adsorption behavior of high-rank coal. The physical properties, pore structure, and fractal dimension of coal reservoirs have a significant impact on methane adsorption capability. Langmuir volume is linearly positively correlated with maximum vitrinite reflectance, vitrinite content, ash content, and moisture content. It is linearly negatively correlated with inertinite content. The Langmuir volume is linearly positively correlated with the pore specific surface area and pore volume of the adsorption pores. The Langmuir volume is weakly linearly correlated with the fractal dimension. The research results can provide theoretical guidance for the exploration and development of high-rank coalbed methane and the prevention and control of coal mine methane disasters in southwestern Guizhou.

     

    • FullText(HTML)
  • loading
    • References(21)
  • [1]
    徐林,袁梅,杨萌萌,等. 贵州省突出煤层孔隙分形特征研究[J]. 工矿自动化,2017,43(4):32-36.

    XU Lin,YUAN Mei,YANG Mengmeng,et al. Research on pore fractal characteristics of outburst coal seam in Guizhou Province[J]. Industry and Mine Automation,2017,43(4):32-36.
    [2]
    LIU Xiaolei,WEI Jianping,WEI Guoying,et al. Combined control of fluid adsorption capacity and initial permeability on coal permeability[J]. International Journal of Coal Science & Technology,2022,9(1). DOI: 10.1007/s40789-022-00545-6.
    [3]
    贾男. 煤孔隙结构对瓦斯解吸−扩散−渗流过程的影响[J]. 工矿自动化,2024,50(3):122-130.

    JIA Nan. The influence of coal pore structure on gas desorption-diffusion-seepage process[J]. Journal of Mine Automation,2024,50(3):122-130.
    [4]
    桑树勋,韩思杰,刘世奇,等. 高煤阶煤层气富集机理的深化研究[J]. 煤炭学报,2022,47(1):388-403.

    SANG Shuxun,HAN Sijie,LIU Shiqi,et al. Comprehensive study on the enrichment mechanism of coalbed methane in high rank coal reservoirs[J]. Journal of China Coal Society,2022,47(1):388-403.
    [5]
    刘纪坤,任棒,王翠霞. 考虑煤基质压缩效应的煤全孔径分布特征研究[J]. 工矿自动化,2022,48(2):125-130.

    LIU Jikun,REN Bang,WANG Cuixia. Study on coal full pore aperture distribution characteristics considering coal matrix compression effect[J]. Industry and Mine Automation,2022,48(2):125-130.
    [6]
    李树刚,周雨璇,胡彪,等. 低阶煤吸附孔结构特征及其对甲烷吸附性能影响[J]. 煤田地质与勘探,2023,51(2):127-136. doi: 10.12363/issn.1001-1986.22.09.0743

    LI Shugang,ZHOU Yuxuan,HU Biao,et al. Structural characteristics of adsorption pores in low-rank coals and their effects on methane adsorption performance[J]. Coal Geology & Exploration,2023,51(2):127-136. doi: 10.12363/issn.1001-1986.22.09.0743
    [7]
    张少锋,李雅阁,秦兴林. 沁水盆地煤储层孔隙分形特征及其对瓦斯吸附的影响[J]. 煤炭科学技术,2019,47(3):163-167.

    ZHANG Shaofeng,LI Yage,QIN Xinglin. Pore fractal characteristic of coal reservoirs in Qinshui Basin and its influence on methane adsorption property[J]. Coal Science and Technology,2019,47(3):163-167.
    [8]
    王俏,王兆丰,代菊花,等. 深部煤层无烟煤甲烷吸附特性研究[J]. 煤矿安全,2021,52(6):28-33.

    WANG Qiao,WANG Zhaofeng,DAI Juhua,et al. Study on methane adsorption characteristics of anthracite in deep coal seam[J]. Safety in Coal Mines,2021,52(6):28-33.
    [9]
    任少魁,秦玉金,贾宗凯,等. 不同煤阶煤孔隙结构分形表征及其对甲烷吸附特性的影响[J]. 煤矿安全,2023,54(5):175-181.

    REN Shaokui,QIN Yujin,JIA Zongkai,et al. Fractal characterization of pore structure of coal with different ranks and its effect on methane adsorption characteristics[J]. Safety in Coal Mines,2023,54(5):175-181.
    [10]
    曾平,张东明,严先华,等. 原生煤和构造煤对甲烷的吸附扩散特性研究[J]. 矿业安全与环保,2023,50(4):36-41.

    ZENG Ping,ZHANG Dongming,YAN Xianhua,et al. Study on gas adsorption and diffusion characteristics of intact coal and tectonic coal[J]. Mining Safety & Environmental Protection,2023,50(4):36-41.
    [11]
    贾永勇,程媛圆,殷紫妤. 不同煤阶煤体甲烷吸附特性的对比分析[J]. 陕西煤炭,2023,42(3):37-42. doi: 10.3969/j.issn.1671-749X.2023.03.008

    JIA Yongyong,CHENG Yuanyuan,YIN Ziyu. Comparative analysis of methane adsorption characteristics of different coal ranks coal body[J]. Shaanxi Coal,2023,42(3):37-42. doi: 10.3969/j.issn.1671-749X.2023.03.008
    [12]
    吴旭坤. 构造应力区松软围岩巷道控制技术研究[D]. 贵阳:贵州大学,2021.

    WU Xukun. Study on roadway control technology of soft surrounding rock in structural stress zone[D]. Guiyang:Guizhou University,2021.
    [13]
    翦非帆. 无烟煤孔隙结构对甲烷吸附解吸特征的影响研究[D]. 徐州:中国矿业大学,2021.

    JIAN Feifan. Effect of pore structure of anthracite on adsorption and desorption characteristics of methane[D]. Xuzhou:China University of Mining and Technology,2021.
    [14]
    张鹏,张欣,王昆. 基于低温氮吸附法的商丘地区高阶煤孔隙特征研究[J]. 中国煤炭地质,2023,35(11):39-45. doi: 10.3969/j.issn.1674-1803.2023.11.06

    ZHANG Peng,ZHANG Xin,WANG Kun. Study on pore characteristics of high rank coal in Shangqiu area based on low-temperature nitrogen adsorption method[J]. Coal Geology of China,2023,35(11):39-45. doi: 10.3969/j.issn.1674-1803.2023.11.06
    [15]
    LI Yunbo,LIU Wen,SONG Dangyu,et al. Full-scale pore characteristics in coal and their influence on the adsorption capacity of coalbed methane[J]. Environmental Science and Pollution Research,2023,30(28):72187-72206. doi: 10.1007/s11356-023-27298-2
    [16]
    THOMMES M,KANEKO K,NEIMARK A V,et al. Physisorption of gases,with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)[J]. Pure and Applied Chemistry,2015,87(9/10):1051-1069.
    [17]
    ZHAO Junlong,XU Hao,TANG Dazhen,et al. A comparative evaluation of coal specific surface area by CO2 and N2 adsorption and its influence on CH4 adsorption capacity at different pore sizes[J]. Fuel,2016,183:420-431. doi: 10.1016/j.fuel.2016.06.076
    [18]
    ZHANG Songhang,TANG Shuheng,TANG Dazhen,et al. Determining fractal dimensions of coal pores by FHH model:problems and effects[J]. Journal of Natural Gas Science and Engineering,2014,21:929-939. doi: 10.1016/j.jngse.2014.10.018
    [19]
    WANG Zhenyang,CHENG Yuanping,QI Yuxiao,et al. Experimental study of pore structure and fractal characteristics of pulverized intact coal and tectonic coal by low temperature nitrogen adsorption[J]. Powder Technology,2019,350:15-25. doi: 10.1016/j.powtec.2019.03.030
    [20]
    YI Minghao,CHENG Yuanping,WANG Chenghao,et al. Effects of composition changes of coal treated with hydrochloric acid on pore structure and fractal characteristics[J]. Fuel,2021,294. DOI: 10.1016/j.fuel.2021.120506.
    [21]
    SONG Yu,JIANG Bo,LI Fengli,et al. Structure and fractal characteristic of micro- and meso-pores in low,middle-rank tectonic deformed coals by CO2 and N2 adsorption[J]. Microporous and Mesoporous Materials,2017,253:191-202. doi: 10.1016/j.micromeso.2017.07.009
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(9)  / Tables(7)

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (117) PDF downloads(21) Cited by()
    Proportional views
    Related

    苏ICP备 05016349号-2

    Supported by: Beijing Renhe Information Technology Co. Ltd.  Visits：    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return