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Hydrate Formation/Dissociation in (Natural Gas + Water + Diesel Oil) Emulsion Systems

Author

Listed:
  • Chang-Sheng Xiang

    (School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, China)

  • Bao-Zi Peng

    (State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
    National Institute of Clean and Low-Carbon Energy, Beijing 102209, China)

  • Huang Liu

    (State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China)

  • Chang-Yu Sun

    (State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China)

  • Guang-Jin Chen

    (State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China)

  • Bao-Jiang Sun

    (School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao 266580, China)

Abstract

Hydrate formation/dissociation of natural gas in (diesel oil + water) emulsion systems containing 3 wt% anti-agglomerant were performed for five water cuts: 5, 10, 15, 20, and 25 vol%. The natural gas solubilities in the emulsion systems were also examined. The experimental results showed that the solubility of natural gas in emulsion systems increases almost linearly with the increase of pressure, and decreases with the increase of water cut. There exists an initial slow hydrate formation stage for systems with lower water cut, while rapid hydrate formation takes place and the process of the gas-liquid dissolution equilibrium at higher water cut does not appear in the pressure curve. The gas consumption amount due to hydrate formation at high water cut is significantly higher than that at low water cut. Fractional distillation for natural gas components also exists during the hydrate formation process. The experiments on hydrate dissociation showed that the dissociation rate and the amount of dissociated gas increase with the increase of water cut. The variations of temperature in the process of natural gas hydrate formation and dissociation in emulsion systems were also examined.

Suggested Citation

  • Chang-Sheng Xiang & Bao-Zi Peng & Huang Liu & Chang-Yu Sun & Guang-Jin Chen & Bao-Jiang Sun, 2013. "Hydrate Formation/Dissociation in (Natural Gas + Water + Diesel Oil) Emulsion Systems," Energies, MDPI, vol. 6(2), pages 1-14, February.
    • Handle: RePEc:gam:jeners:v:6:y:2013:i:2:p:1009-1022:d:23613
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    References listed on IDEAS

    as
    1. Jiafei Zhao & Chuanxiao Cheng & Yongchen Song & Weiguo Liu & Yu Liu & Kaihua Xue & Zihao Zhu & Zhi Yang & Dayong Wang & Mingjun Yang, 2012. "Heat Transfer Analysis of Methane Hydrate Sediment Dissociation in a Closed Reactor by a Thermal Method," Energies, MDPI, vol. 5(5), pages 1-17, May.
    2. Lijun Xiong & Xiaosen Li & Yi Wang & Chungang Xu, 2012. "Experimental Study on Methane Hydrate Dissociation by Depressurization in Porous Sediments," Energies, MDPI, vol. 5(2), pages 1-13, February.
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