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Effect of water-based SiO2 nanofluid on surface wettability of raw coal

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  • Zou, Quanle
  • Zhang, Tiancheng
  • Ma, Tengfei
  • Tian, Shixiang
  • Jia, Xueqi
  • Jiang, Zebiao

Abstract

Coal seam water injection has been shown to be an effective method for controlling coal and gas outburst disasters in coal mines. However, the shortcomings, such as poor wettability of the coal seam and easy filtration loss of injected water, have resulted in low construction efficiency and uneven control effects. In this study, a method of surface wettability alteration through a water-based SiO2 nanofluid was proposed to overcome the aforementioned shortcomings, and the underlying action mechanism was elucidated. First, the sedimentation characteristics of the water-based SiO2 nanofluid were evaluated using three test methods. Then, the variations in the water content and contact angle were obtained. Finally, potential mechanisms for the application of water-based SiO2 nanofluid in coal seam water injection technology were revealed. Based on the nanofluid sedimentation characterization, the enhancement effects of SiO2 nanofluid on the surface wettability and water adsorption of raw coal were elucidated in this study, indicating that the presence of nanofluid improved the effectiveness of coal seam water injection. In addition, the SiO2 nanofluid had a similar wetting effect on samples with initial contact angles of both 80° and 90°. These results can provide new ideas for improving the effectiveness of coal seam water injection.

Suggested Citation

  • Zou, Quanle & Zhang, Tiancheng & Ma, Tengfei & Tian, Shixiang & Jia, Xueqi & Jiang, Zebiao, 2022. "Effect of water-based SiO2 nanofluid on surface wettability of raw coal," Energy, Elsevier, vol. 254(PA).
    • Handle: RePEc:eee:energy:v:254:y:2022:i:pa:s0360544222011318
    DOI: 10.1016/j.energy.2022.124228
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    References listed on IDEAS

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    1. Lili Li & Jupeng Tang & Shengjie Sun & Jiahui Ding, 2019. "Experimental study of the influence of water content on energy conversion of coal and gas outburst," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 97(3), pages 1083-1097, July.
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    Cited by:

    1. Wang, Gang & Xie, Shuliang & Huang, Qiming & Wang, Enmao & Wang, Shuxin, 2023. "Study on the performances of fluorescent tracers for the wetting area detection of coal seam water injection," Energy, Elsevier, vol. 263(PE).
    2. Zebiao Jiang & Xiping Quan & Shixiang Tian & Hao Liu & Yaling Guo & Xiangxiang Fu & Xifa Yang, 2022. "Permeability-Enhancing Technology through Liquid CO 2 Fracturing and Its Application," Sustainability, MDPI, vol. 14(16), pages 1-23, August.
    3. Xiaoyan Sun & Qican Ran & Hao Liu & Yanhao Ning & Tengfei Ma, 2023. "Characteristics of Stress-Displacement-Fracture Multi-Field Evolution around Gas Extraction Borehole," Energies, MDPI, vol. 16(6), pages 1-21, March.
    4. Cun Zhang & Xiaojie Wang & Shangxin Fang & Xutao Shi, 2022. "Construction and Application of VR-AR Teaching System in Coal-Based Energy Education," Sustainability, MDPI, vol. 14(23), pages 1-14, December.
    5. Hongyan Qin & Jingui Zhang & Zhiheng Cheng & Zhenhua Ouyang & Liang Chen & Haiyang Yi & Xidong Zhao & Yang Li & Hao Liu, 2022. "Research on Overburden Failure Characteristics Based on the Theory of Plates and Shells," Sustainability, MDPI, vol. 14(18), pages 1-16, September.

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