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Experimental and computational investigation of methane hydrate inhibition in the presence of amino acids and ionic liquids

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  • Lee, Dongyoung
  • Go, Woojin
  • Seo, Yongwon

Abstract

Amino acids (glycine and alanine) and ionic liquids ([BMIM][BF4] and [BMIM][I]) were examined for their inhibition effects on CH4 hydrates with experimental and computational approaches. Both amino acids and ionic liquids functioned well as thermodynamic hydrate inhibitors, by shifting equilibrium curves of CH4 hydrates toward harsh conditions. However, powder X-ray diffraction patterns indicated that amino acids and ionic liquids did not affect the hydrate structure because they were not included in the hydrate cages due to their large molecular size. Gas uptake measurements showed that the conversion of water into gas hydrates and the formation rates of CH4 hydrate were significantly influenced by inhibitors. Density functional theory calculations indicated that [BMIM][BF4] had a larger potential than glycine to inhibit gas hydrate formation by giving a more negative interaction energy between a cage and an inhibitor molecule. The time-dependent Raman spectra collected during CH4 hydrate formation demonstrated that [BMIM][BF4] hindered CH4 molecules from occupying small (512) cages, whereas glycine had a strong influence on large (51262) cages of sI hydrates. The experimental and computational results provide a better understanding of inhibition mechanisms of gas hydrates and thus can contribute to the improved control of hydrate formation in oil and gas pipelines.

Suggested Citation

  • Lee, Dongyoung & Go, Woojin & Seo, Yongwon, 2019. "Experimental and computational investigation of methane hydrate inhibition in the presence of amino acids and ionic liquids," Energy, Elsevier, vol. 182(C), pages 632-640.
    • Handle: RePEc:eee:energy:v:182:y:2019:i:c:p:632-640
    DOI: 10.1016/j.energy.2019.06.025
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    Cited by:

    1. Shi, Lingli & He, Yong & Lu, Jingsheng & Hou, Guodong & Liang, Deqing, 2021. "Anti-agglomeration evaluation and Raman spectroscopic analysis on mixed biosurfactants for preventing CH4 hydrate blockage in n-octane + water systems," Energy, Elsevier, vol. 229(C).
    2. Li, Zhi & Zhang, Yue & Shen, Yimao & Cheng, Liwei & Liu, Bei & Yan, Kele & Chen, Guangjin & Li, Tianduo, 2022. "Molecular dynamics simulation to explore the synergistic inhibition effect of kinetic and thermodynamic hydrate inhibitors," Energy, Elsevier, vol. 238(PB).
    3. Shi, Lingli & He, Yong & Lu, Jingsheng & Liang, Deqing, 2020. "Effect of dodecyl dimethyl benzyl ammonium chloride on CH4 hydrate growth and agglomeration in oil-water systems," Energy, Elsevier, vol. 212(C).
    4. Long, Zhen & Zhou, Xuebing & Lu, Zhilin & Liang, Deqing, 2022. "Kinetic inhibition performance of N-vinyl caprolactam/isopropylacrylamide copolymers on methane hydrate formation," Energy, Elsevier, vol. 242(C).
    5. Farhadian, Abdolreza & Varfolomeev, Mikhail A. & Rezaeisadat, Morteza & Semenov, Anton P. & Stoporev, Andrey S., 2020. "Toward a bio-based hybrid inhibition of gas hydrate and corrosion for flow assurance," Energy, Elsevier, vol. 210(C).
    6. Kim, Hyunho & Zheng, Junjie & Yin, Zhenyuan & Babu, Ponnivalavan & Kumar, Sreekala & Tee, Jackson & Linga, Praveen, 2023. "Semi-clathrate hydrate slurry as a cold energy storage and transport medium: Rheological study, energy analysis and enhancement by amino acid," Energy, Elsevier, vol. 264(C).
    7. Jia, Wenlong & Yang, Fan & Li, Changjun & Huang, Ting & Song, Shuoshuo, 2021. "A unified thermodynamic framework to compute the hydrate formation conditions of acidic gas/water/alcohol/electrolyte mixtures up to 186.2 MPa," Energy, Elsevier, vol. 230(C).
    8. Liao, Bo & Wang, Jintang & Li, Mei-Chun & Lv, Kaihe & Wang, Qi & Li, Jian & Huang, Xianbing & Wang, Ren & Lv, Xindi & Chen, Zhangxin & Sun, Jinsheng, 2023. "Microscopic molecular and experimental insights into multi-stage inhibition mechanisms of alkylated hydrate inhibitor," Energy, Elsevier, vol. 279(C).
    9. Jyoti Shanker Pandey & Saad Khan & Nicolas von Solms, 2021. "Chemically Influenced Self-Preservation Kinetics of CH 4 Hydrates below the Sub-Zero Temperature," Energies, MDPI, vol. 14(20), pages 1-28, October.
    10. Zheng Li & Christine C. Holzammer & Andreas S. Braeuer, 2020. "Analysis of the Dissolution of CH 4 /CO 2 -Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy," Energies, MDPI, vol. 13(4), pages 1-17, February.
    11. Go, Woojin & Yun, Soyeong & Lee, Dongyoung & Seo, Yongwon, 2022. "Experimental and computational investigation of hydrophilic monomeric substances as novel CO2 hydrate inhibitors and potential synergists," Energy, Elsevier, vol. 244(PB).
    12. Salma Elhenawy & Majeda Khraisheh & Fares Almomani & Mohammad A. Al-Ghouti & Mohammad K. Hassan & Ala’a Al-Muhtaseb, 2022. "Towards Gas Hydrate-Free Pipelines: A Comprehensive Review of Gas Hydrate Inhibition Techniques," Energies, MDPI, vol. 15(22), pages 1-44, November.
    13. Foroutan, Shima & Mohsenzade, Hanie & Dashti, Ali & Roosta, Hadi, 2021. "New insights into the evaluation of kinetic hydrate inhibitors and energy consumption in rocking and stirred cells," Energy, Elsevier, vol. 218(C).
    14. M Fahed Qureshi & Majeda Khraisheh & Fares Almomani, 2020. "Doping amino acids with classical gas hydrate inhibitors to facilitate the hydrate inhibition effect at low dosages," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 10(4), pages 783-794, August.

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