IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v271y2023ics0360544223004073.html
   My bibliography  Save this article

Analysis of the wetting and exothermic properties of preoxidized coal and the microscopic mechanism

Author

Listed:
  • Pan, Rongkun
  • Hu, Daimin
  • Han, Xuefeng
  • Chao, Jiangkun
  • Jia, Hailin

Abstract

In the processes of coal mining and transportation, low-temperature oxidation occurs continuously, and it is accompanied by multiple wetting. The effect of water on coal spontaneous combustion (CSC) cannot be ignored. To study the wetting and exothermic properties of preoxidized coal and the mechanism of its effect on CSC, molecular dynamics simulations, microcalorimetry, scanning electron microscopy (SEM) and fourier transform infrared spectrometer (FTIR) are used to analyze the molecular dynamics mechanism, heat of wetting (Hw), surface structure and microscopic group changes. Experimental results show that the surface potential distribution of coal is uneven, which leads to the adsorption of polar water molecules; the total energy of the system continues to decrease during the adsorption process. The preoxidation treatment further develops pore fissures, increases the percentage of hydrophilic groups and evaporates the original water. Therefore, in the coal low-temperature oxidation stage, the higher the degree of preoxidation is, the greater the Hw value. After preoxidation and wetting, the loose and porous characteristics of coal are further reflected; the oxygen percolation and adsorption are enhanced, which accelerates the system heat accumulation and thus intensifies the risk of CSC. The experimental results provide an important theoretical basis for the prevention of CSC.

Suggested Citation

  • Pan, Rongkun & Hu, Daimin & Han, Xuefeng & Chao, Jiangkun & Jia, Hailin, 2023. "Analysis of the wetting and exothermic properties of preoxidized coal and the microscopic mechanism," Energy, Elsevier, vol. 271(C).
    • Handle: RePEc:eee:energy:v:271:y:2023:i:c:s0360544223004073
    DOI: 10.1016/j.energy.2023.127013
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544223004073
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2023.127013?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Huang, Zhehao & Dong, Hao & Jia, Shuaishuai, 2022. "Equilibrium pricing for carbon emission in response to the target of carbon emission peaking," Energy Economics, Elsevier, vol. 112(C).
    2. Li, Purui & Yang, Yongliang & Zhao, Xiaohao & Li, Jinhu & Yang, Jingjing & Zhang, Yifan & Yan, Qi & Shen, Chang, 2023. "Spontaneous combustion and oxidation kinetic characteristics of alkaline-water-immersed coal," Energy, Elsevier, vol. 263(PE).
    3. Lü, Hui-Fei & Deng, Jun & Li, Da-Jiang & Xu, Fan & Xiao, Yang & Shu, Chi-Min, 2021. "Effect of oxidation temperature and oxygen concentration on macro characteristics of pre-oxidised coal spontaneous combustion process," Energy, Elsevier, vol. 227(C).
    4. Song, Jiajia & Deng, Jun & Zhao, Jingyu & Zhang, Yanni & Wang, Caiping & Shu, Chi-Min, 2021. "Critical particle size analysis of gas emission under high-temperature oxidation of weathered coal," Energy, Elsevier, vol. 214(C).
    5. Zhao, Jingyu & Deng, Jun & Chen, Long & Wang, Tao & Song, Jiajia & Zhang, Yanni & Shu, Chi-Min & Zeng, Qiang, 2019. "Correlation analysis of the functional groups and exothermic characteristics of bituminous coal molecules during high-temperature oxidation," Energy, Elsevier, vol. 181(C), pages 136-147.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Jiang, Bingyou & Yu, Chang-Fei & Yuan, Liang & Lu, Kunlun & Tao, Wenhan & Lin, Hanyi & Zhou, Yu, 2023. "Investigation on oxidative pyrolysis characteristics of bituminous coal through thermal analysis and density functional theory," Applied Energy, Elsevier, vol. 349(C).
    2. Xu, Yong-liang & Huo, Xing-wang & Wang, Lan-yun & Gong, Xiang-jun & Lv, Ze-cheng & Zhao, Tian, 2024. "Spontaneous combustion properties and quantitative characterization of catastrophic temperature for pre-oxidized broken coal under stress," Energy, Elsevier, vol. 288(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Deng, Jun & Yang, Nannan & Wang, Caiping & Yin, Deng & Xiaoyong, Zhao & He, Yongjun, 2023. "Study on staged heat transfer law of coal spontaneous combustion in deep mines," Energy, Elsevier, vol. 285(C).
    2. Zhao, Jingyu & Hang, Gai & Song, Jiajia & Lu, Shiping & Ming, Hanqi & Chang, Jiaming & Deng, Jun & Zhang, Yanni & Shu, Chi-Min, 2023. "Spontaneous oxidation kinetics of weathered coal based upon thermogravimetric characteristics," Energy, Elsevier, vol. 275(C).
    3. Guo, Shengli & Yang, Wenwang & Yuan, Shujie & Zhuo Yan, & Geng, Weile, 2022. "Experimental investigation of erosion effect on microstructure and oxidation characteristics of long-flame coal," Energy, Elsevier, vol. 259(C).
    4. Zhao, Jingyu & Zhang, Yongli & Song, Jiajia & Guo, Tao & Deng, Jun & Shu, Chi-Min, 2023. "Oxygen distribution and gaseous products change of coal fire based upon the semi-enclosed experimental system," Energy, Elsevier, vol. 263(PB).
    5. Liu, Yin & Wen, Hu & Guo, Jun & Jin, Yongfei & Fan, Shixing & Cai, Guobin & Liu, Renfei, 2023. "Correlation between oxygen concentration and reaction rate of low-temperature coal oxidation: A case study of long-flame coal," Energy, Elsevier, vol. 275(C).
    6. Qu, Baolin & Wang, Jingxin & Zhu, Hongqing & Hu, Lintao & Liao, Qi, 2024. "Experimental study on evolution and mechanism for dielectric response of different rank coals in terahertz band," Energy, Elsevier, vol. 288(C).
    7. Fu, Shenguang & Wang, Liang & Li, Shuohao & Ni, Sijia & Cheng, Yuanping & Zhang, Xiaolei & Liu, Shimin, 2024. "Re-thinking methane storage mechanism in highly metamorphic coalbed reservoirs — A molecular simulation considering organic components," Energy, Elsevier, vol. 293(C).
    8. Wenxuan Ma, 2022. "Exploring the Role of Educational Human Capital and Green Finance in Total-Factor Energy Efficiency in the Context of Sustainable Development," Sustainability, MDPI, vol. 15(1), pages 1-18, December.
    9. Liu, Wei & Chu, Xiangyu & Xu, Hao & Chen, Wei & Ma, Liwei & Qin, Yueping & Wei, Jun, 2022. "Oxidation reaction constants for coal spontaneous combustion under inert gas environments: An experimental investigation," Energy, Elsevier, vol. 247(C).
    10. Huang, Jiliang & Tan, Bo & Gao, Liyang & Shao, Zhuangzhuang & Wang, Haiyan & Chen, Zhen, 2023. "A multi-channel reaction model study of key primary and secondary active groups in the low-temperature oxidation process of coal," Energy, Elsevier, vol. 283(C).
    11. Shi, Quanlin & Jiang, Wenjie & Qin, Botao & Hao, Mingyue & He, Zhenyu, 2023. "Effects of oxidation temperature on microstructure and spontaneous combustion characteristics of coal: A case study of Shendong long-flame coal," Energy, Elsevier, vol. 284(C).
    12. Zhao, Jingyu & Wang, Tao & Deng, Jun & Shu, Chi-Min & Zeng, Qiang & Guo, Tao & Zhang, Yuxuan, 2020. "Microcharacteristic analysis of CH4 emissions under different conditions during coal spontaneous combustion with high-temperature oxidation and in situ FTIR," Energy, Elsevier, vol. 209(C).
    13. He, Yongjun & Deng, Jun & Yi, Xin & Xiao, Yang & Deng, Yin & Chen, Weile, 2023. "Effect of rare-earth-containing inhibitors on the low-temperature oxidation characteristics and thermodynamic properties of coal," Energy, Elsevier, vol. 281(C).
    14. Zhang, Xun & Zou, Jiahui & Lu, Bing & Huang, Ge & Yu, Chen & Liang, Huimin, 2023. "Experimental study on effect of mudstone on spontaneous combustion of coal," Energy, Elsevier, vol. 285(C).
    15. Wang, Kai & Hu, Lihong & Deng, Jun & Zhang, Yanni, 2023. "Multiscale thermal behavioral characterization of spontaneous combustion of pre-oxidized coal with different air exposure time," Energy, Elsevier, vol. 262(PA).
    16. Huizi Ma & Xuan Miao & Zhen Wang & Xiangrong Wang, 2023. "How Does Green Finance Affect the Sustainable Development of the Regional Economy? Evidence from China," Sustainability, MDPI, vol. 15(4), pages 1-16, February.
    17. Hua Wang & Wei Zhang & Haihui Xin & Deming Wang & Cuicui Di & Lu Liu, 2021. "Characteristics of Pyrolysis and Low Oxygen Combustion of Long Flame Coal and Reburning of Residues," Energies, MDPI, vol. 14(10), pages 1-17, May.
    18. Gao, Mingqiang & Cheng, Cheng & Miao, Zhenyong & Wan, Keji & He, Qiongqiong, 2023. "Physicochemical properties, combustion kinetics and thermodynamics of oxidized lignite," Energy, Elsevier, vol. 268(C).
    19. Zhu, Wenkun & Li, Xiaohui & Sun, Rui & Cao, Zhen & Yuan, Mengfan & Sun, Liutao & Yu, Xin & Wu, Jiangquan, 2022. "Investigation of the CN and C2 emission characteristics and microstructural evolution of coal to char using laser-induced breakdown spectroscopy and Raman spectroscopy," Energy, Elsevier, vol. 240(C).
    20. Armenia Androniceanu & Oana Matilda Sabie, 2022. "Overview of Green Energy as a Real Strategic Option for Sustainable Development," Energies, MDPI, vol. 15(22), pages 1-35, November.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:271:y:2023:i:c:s0360544223004073. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.