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Clathrate-hydrate formation from a hydrocarbon gas mixture: Compositional evolution of formed hydrate during an isobaric semi-batch hydrate-forming operation

Author

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  • Kondo, Wataru
  • Ohtsuka, Kaoru
  • Ohmura, Ryo
  • Takeya, Satoshi
  • Mori, Yasuhiko H.

Abstract

The clathrate hydrate formation from a model natural gas, i.e., a mixture of methane, ethane, and propane in a 90:7:3molar ratio, under a constant pressure was experimentally investigated, focusing on the compositional evolution of hydrate crystals formed inside a gas-bubbling-type reactor during each semi-batch hydrate-forming operation. The experimental system used in this study was specially designed for obtaining several hydrate samples formed at different, arbitrarily selected stages during each hydrate-forming operation. Each hydrate sample was analyzed by a gas-chromatograph to determine the mole fractions of methane, ethane and propane encaged in the hydrate. These analyses revealed a monotonic increase in the methane fraction and decreases in the ethane and propane fractions during each operation until a quasi-steady state was established. Powder X-ray diffraction analyses showed that both structure-I and structure-II crystals were simultaneously formed during the quasi-steady period. The compositional evolution of the hydrates formed during the early stages before the quasi-steady state was reached deviated from corresponding predictions based on the thermodynamic-simulation scheme previously reported. A hypothetical explanation for the discrepancy between the experimental and simulation-based results was provided.

Suggested Citation

  • Kondo, Wataru & Ohtsuka, Kaoru & Ohmura, Ryo & Takeya, Satoshi & Mori, Yasuhiko H., 2014. "Clathrate-hydrate formation from a hydrocarbon gas mixture: Compositional evolution of formed hydrate during an isobaric semi-batch hydrate-forming operation," Applied Energy, Elsevier, vol. 113(C), pages 864-871.
    • Handle: RePEc:eee:appene:v:113:y:2014:i:c:p:864-871
    DOI: 10.1016/j.apenergy.2013.08.033
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    Citations

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    Cited by:

    1. Kim, Soyoung & Baek, Il-Hyun & You, Jong-Kyun & Seo, Yongwon, 2015. "Guest gas enclathration in tetra-n-butyl ammonium chloride (TBAC) semiclathrates: Potential application to natural gas storage and CO2 capture," Applied Energy, Elsevier, vol. 140(C), pages 107-112.
    2. Wang, Fei & Fu, Shanfei & Guo, Gang & Jia, Zhen-Zhen & Luo, Sheng-Jun & Guo, Rong-Bo, 2016. "Experimental study on hydrate-based CO2 removal from CH4/CO2 mixture," Energy, Elsevier, vol. 104(C), pages 76-84.
    3. Yi, Jie & Zhong, Dong-Liang & Yan, Jin & Lu, Yi-Yu, 2019. "Impacts of the surfactant sulfonated lignin on hydrate based CO2 capture from a CO2/CH4 gas mixture," Energy, Elsevier, vol. 171(C), pages 61-68.
    4. Zhang, Jianbo & Wang, Zhiyuan & Liu, Shun & Zhang, Weiguo & Yu, Jing & Sun, Baojiang, 2019. "Prediction of hydrate deposition in pipelines to improve gas transportation efficiency and safety," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
    5. Luiz F. Rodrigues & Alessandro Ramos & Gabriel de Araujo & Edson Silveira & Marcelo Ketzer & Rogerio Lourega, 2019. "High-Pressure and Automatized System for Study of Natural Gas Hydrates," Energies, MDPI, vol. 12(16), pages 1-14, August.
    6. Zhong, Dong-Liang & Li, Zheng & Lu, Yi-Yu & Wang, Jia-Le & Yan, Jin, 2015. "Evaluation of CO2 removal from a CO2+CH4 gas mixture using gas hydrate formation in liquid water and THF solutions," Applied Energy, Elsevier, vol. 158(C), pages 133-141.
    7. Yang, Mingjun & Song, Yongchen & Jiang, Lanlan & Liu, Weiguo & Dou, Binlin & Jing, Wen, 2014. "Effects of operating mode and pressure on hydrate-based desalination and CO2 capture in porous media," Applied Energy, Elsevier, vol. 135(C), pages 504-511.
    8. Kamal, Muhammad Shahzad & Hussein, Ibnelwaleed A. & Sultan, Abdullah S. & von Solms, Nicolas, 2016. "Application of various water soluble polymers in gas hydrate inhibition," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 206-225.
    9. Liu, Jun & Ding, Jia-Xiang & Liang, De-Qing, 2018. "Experimental study on hydrate-based gas separation of mixed CH4/CO2 using unstable ice in a silica gel bed," Energy, Elsevier, vol. 157(C), pages 54-64.
    10. Veluswamy, Hari Prakash & Kumar, Asheesh & Seo, Yutaek & Lee, Ju Dong & Linga, Praveen, 2018. "A review of solidified natural gas (SNG) technology for gas storage via clathrate hydrates," Applied Energy, Elsevier, vol. 216(C), pages 262-285.

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