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Experimental Study on the Effect of Mixed Thermodynamic Inhibitors with Different Concentrations on Natural Gas Hydrate Synthesis

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  • Hengjie Luan

    (State Key Laboratory of Production Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
    College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Mingkang Liu

    (State Key Laboratory of Production Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
    College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Qinglin Shan

    (State Key Laboratory of Production Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
    College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yujing Jiang

    (State Key Laboratory of Production Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
    Graduate School of Engineering, Nagasaki University, Nagasaki 852-8521, Japan)

  • Peng Yan

    (State Key Laboratory of Production Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
    College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Xiaoyu Du

    (State Key Laboratory of Production Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
    College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

Natural gas hydrate (NGH) is a potential future energy resource. More than 90% of NGH resources exist in the pore medium of seafloor sediments. During the development of deep-sea oil and gas fields, wellbore pipelines are often clogged due to the synthesis of gas hydrates, and the addition of thermodynamic inhibitors is a common solution to prevent hydrate synthesis. In this paper, the effects of two single inhibitors, sodium chloride and ethylene glycol, as well as hybrid inhibitors combining these two inhibitors on the synthesis of methane hydrates were investigated using the self-developed one-dimensional gas hydrate exploitation simulation test apparatus. The effects of single and hybrid inhibitors were investigated in terms of the hydrate synthesis volume and gas–water two-phase conversion rate. The results show that the hybrid inhibitor has a better inhibitory effect on hydrate synthesis with the same initial synthesis driving force. When the concentration of inhibitors is low, salt inhibitors can have a better inhibitory effect than alcohol inhibitors. However, in the mixed inhibitor experiment, increasing the proportion of ethylene glycol in the mixed inhibitor can more effectively inhibit the synthesis of hydrates than increasing the proportion of sodium chloride in the mixed inhibitor.

Suggested Citation

  • Hengjie Luan & Mingkang Liu & Qinglin Shan & Yujing Jiang & Peng Yan & Xiaoyu Du, 2024. "Experimental Study on the Effect of Mixed Thermodynamic Inhibitors with Different Concentrations on Natural Gas Hydrate Synthesis," Energies, MDPI, vol. 17(9), pages 1-16, April.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2078-:d:1383876
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    References listed on IDEAS

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    1. Yang, She Hern Bryan & Babu, Ponnivalavan & Chua, Sam Fu Sheng & Linga, Praveen, 2016. "Carbon dioxide hydrate kinetics in porous media with and without salts," Applied Energy, Elsevier, vol. 162(C), pages 1131-1140.
    2. Li, Xiao-Sen & Xu, Chun-Gang & Zhang, Yu & Ruan, Xu-Ke & Li, Gang & Wang, Yi, 2016. "Investigation into gas production from natural gas hydrate: A review," Applied Energy, Elsevier, vol. 172(C), pages 286-322.
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