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Study on Carbon Storage by CO2 Hydrate Formation in the Ion-Containing Environment

Received: 6 April 2023     Accepted: 8 May 2023     Published: 18 May 2023
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Abstract

The current greenhouse effect caused by massive CO2 accumulation must be addressed urgently. Because of the ocean's enormous capacity, the high density of CO2 hydrate, and the high stability of CO2 sequestration in hydrate form, the process of hydrate generation can trap CO2 molecules into the lattice of water molecules and is considered for the sequestration of CO2 in hydrate form in the ocean. In this paper, molecular dynamics (MD) simulations are used to investigate the kinetic behavior of CO2 hydrate growth in ion-containing electrolyte solutions. The mechanism of salt ion effect on hydrate growth during pressure changes is investigated. The simulations show that in the presence of salt ions, the hydrate growth rate fluctuates significantly, despite the fact that a greater driving force can facilitate the hydrate growth process. Higher pressures increase guest molecule occupancy in the hydrate cage, while the saline environment causes competition for water molecules between the hydrate cage and salt ions, increasing the proportion of empty cages. Lower pressures and the presence of salt ions reduce CO2 molecules' selectivity for the smaller 512 cages, creating a barrier to hydrate growth. The findings of the study look at the microscopic mechanism of CO2 hydrate generation in seawater and serve as a guide for future implementation of hydrate method CO2 sequestration technology in the marine environment.

Published in Science Discovery (Volume 11, Issue 3)
DOI 10.11648/j.sd.20231103.11
Page(s) 83-89
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2023. Published by Science Publishing Group

Keywords

Carbon Sequestration, Molecular Dynamics, Ion-containing Environment, CO2 Hydrate Growth

References
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Cite This Article
  • APA Style

    Hui Wang, Yi Lu, Xiaoxin Zhang, Qi Fan, Qingping Li, et al. (2023). Study on Carbon Storage by CO2 Hydrate Formation in the Ion-Containing Environment. Science Discovery, 11(3), 83-89. https://doi.org/10.11648/j.sd.20231103.11

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    ACS Style

    Hui Wang; Yi Lu; Xiaoxin Zhang; Qi Fan; Qingping Li, et al. Study on Carbon Storage by CO2 Hydrate Formation in the Ion-Containing Environment. Sci. Discov. 2023, 11(3), 83-89. doi: 10.11648/j.sd.20231103.11

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    AMA Style

    Hui Wang, Yi Lu, Xiaoxin Zhang, Qi Fan, Qingping Li, et al. Study on Carbon Storage by CO2 Hydrate Formation in the Ion-Containing Environment. Sci Discov. 2023;11(3):83-89. doi: 10.11648/j.sd.20231103.11

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  • @article{10.11648/j.sd.20231103.11,
      author = {Hui Wang and Yi Lu and Xiaoxin Zhang and Qi Fan and Qingping Li and Lunxiang Zhang and Jiafei Zhao and Lei Yang and Yongchen Song},
      title = {Study on Carbon Storage by CO2 Hydrate Formation in the Ion-Containing Environment},
      journal = {Science Discovery},
      volume = {11},
      number = {3},
      pages = {83-89},
      doi = {10.11648/j.sd.20231103.11},
      url = {https://doi.org/10.11648/j.sd.20231103.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20231103.11},
      abstract = {The current greenhouse effect caused by massive CO2 accumulation must be addressed urgently. Because of the ocean's enormous capacity, the high density of CO2 hydrate, and the high stability of CO2 sequestration in hydrate form, the process of hydrate generation can trap CO2 molecules into the lattice of water molecules and is considered for the sequestration of CO2 in hydrate form in the ocean. In this paper, molecular dynamics (MD) simulations are used to investigate the kinetic behavior of CO2 hydrate growth in ion-containing electrolyte solutions. The mechanism of salt ion effect on hydrate growth during pressure changes is investigated. The simulations show that in the presence of salt ions, the hydrate growth rate fluctuates significantly, despite the fact that a greater driving force can facilitate the hydrate growth process. Higher pressures increase guest molecule occupancy in the hydrate cage, while the saline environment causes competition for water molecules between the hydrate cage and salt ions, increasing the proportion of empty cages. Lower pressures and the presence of salt ions reduce CO2 molecules' selectivity for the smaller 512 cages, creating a barrier to hydrate growth. The findings of the study look at the microscopic mechanism of CO2 hydrate generation in seawater and serve as a guide for future implementation of hydrate method CO2 sequestration technology in the marine environment.},
     year = {2023}
    }
    

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  • TY  - JOUR
    T1  - Study on Carbon Storage by CO2 Hydrate Formation in the Ion-Containing Environment
    AU  - Hui Wang
    AU  - Yi Lu
    AU  - Xiaoxin Zhang
    AU  - Qi Fan
    AU  - Qingping Li
    AU  - Lunxiang Zhang
    AU  - Jiafei Zhao
    AU  - Lei Yang
    AU  - Yongchen Song
    Y1  - 2023/05/18
    PY  - 2023
    N1  - https://doi.org/10.11648/j.sd.20231103.11
    DO  - 10.11648/j.sd.20231103.11
    T2  - Science Discovery
    JF  - Science Discovery
    JO  - Science Discovery
    SP  - 83
    EP  - 89
    PB  - Science Publishing Group
    SN  - 2331-0650
    UR  - https://doi.org/10.11648/j.sd.20231103.11
    AB  - The current greenhouse effect caused by massive CO2 accumulation must be addressed urgently. Because of the ocean's enormous capacity, the high density of CO2 hydrate, and the high stability of CO2 sequestration in hydrate form, the process of hydrate generation can trap CO2 molecules into the lattice of water molecules and is considered for the sequestration of CO2 in hydrate form in the ocean. In this paper, molecular dynamics (MD) simulations are used to investigate the kinetic behavior of CO2 hydrate growth in ion-containing electrolyte solutions. The mechanism of salt ion effect on hydrate growth during pressure changes is investigated. The simulations show that in the presence of salt ions, the hydrate growth rate fluctuates significantly, despite the fact that a greater driving force can facilitate the hydrate growth process. Higher pressures increase guest molecule occupancy in the hydrate cage, while the saline environment causes competition for water molecules between the hydrate cage and salt ions, increasing the proportion of empty cages. Lower pressures and the presence of salt ions reduce CO2 molecules' selectivity for the smaller 512 cages, creating a barrier to hydrate growth. The findings of the study look at the microscopic mechanism of CO2 hydrate generation in seawater and serve as a guide for future implementation of hydrate method CO2 sequestration technology in the marine environment.
    VL  - 11
    IS  - 3
    ER  - 

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Author Information
  • Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China

  • Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China

  • Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China

  • State Key Laboratory of Natural Gas Hydrate, China National Offshore Oil Corporation, Beijing, China

  • State Key Laboratory of Natural Gas Hydrate, China National Offshore Oil Corporation, Beijing, China

  • Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China

  • Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China

  • Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China

  • Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China

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