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Effects of dual Gemini-based fracturing fluid on the physicochemical properties of coking coal: Material preparation and wetting mechanism

Author

Listed:
  • Zhou, Gang
  • Wang, Qi
  • Zhang, Yizhen
  • Zhang, Qi
  • Li, Lin
  • Wang, Yongmei
  • Sun, Biao
  • Liu, Rulin

Abstract

In order to study the effects of fracturing fluid on the physicochemical properties of coking coal, and further improve the wetting effect of fracturing fluid on coal body. In this paper, an amphoteric surfactant (AS-22) was synthesized from erucic acid, and an amphoteric Gemini surfactant (GAS-22) was further synthesized by introducing 1,3-dichloro-2-propanol as a linker group. Then, the dual Gemini-based fracturing fluid (GAS-22/Gemini-3OH) that can be used for coal seam water injection to wet the coal body is prepared by combining with anionic Gemini surfactant (Gemini-3OH). The coal samples treated with fracturing fluid were analyzed by using characterization measurements, performance analysis and molecular dynamics simulation to reveal the mechanism of action of fracturing fluid wetting coal body. The results showed that four fracturing fluids, AS-22, GAS-22, AS-22/Gemini-3OH and GAS-22/Gemini-3OH, had different degrees of influence on the physicochemical properties of coking coal, and GAS-22/Gemini-3OH had the greatest influence on the element content, morphological structure, and compositional content of the coal samples. In addition, the contact angle experiments and molecular dynamics simulation showed that GAS-22/Gemini-3OH had better adsorption and wetting effect on coal body. This study provides theoretical guidance for developing efficient fracturing fluid to improve the wetting performance of coal bodies.

Suggested Citation

  • Zhou, Gang & Wang, Qi & Zhang, Yizhen & Zhang, Qi & Li, Lin & Wang, Yongmei & Sun, Biao & Liu, Rulin, 2024. "Effects of dual Gemini-based fracturing fluid on the physicochemical properties of coking coal: Material preparation and wetting mechanism," Energy, Elsevier, vol. 289(C).
    • Handle: RePEc:eee:energy:v:289:y:2024:i:c:s0360544223034497
    DOI: 10.1016/j.energy.2023.130055
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    References listed on IDEAS

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    1. 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).
    2. Sun, Lulu & Zhan, Mingyu & Zhang, Chen & Shi, Quanlin & Huang, Qiming & Wang, Wenjie, 2022. "Experimental study on prevention of spontaneous combustion of coal by ionic surfactant solution injection in coal seam," Energy, Elsevier, vol. 260(C).
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