SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 43 ›› Issue (3): 185-191.DOI: 10.1016/j.cjche.2022.01.008

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Hydrate formation from liquid CO2 in a glass beads bed

Nan Li1, Jing-Yu Kan1, Chang-Yu Sun2, Guang-Jin Chen2   

  1. 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing at Karamay, Karamay 834000, China;
    2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • 收稿日期:2021-07-23 修回日期:2021-12-07 出版日期:2022-03-28 发布日期:2022-04-28
  • 通讯作者: Nan Li,E-mail:linan@cupk.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (No. 22008258), Tianshan Youth Program in Xinjiang Uygur Autonomous Region (2019Q089) and the Scientific Research Program of Universities in Xinjiang Uygur Autonomous Region (XJEDU2019Y069).

Hydrate formation from liquid CO2 in a glass beads bed

Nan Li1, Jing-Yu Kan1, Chang-Yu Sun2, Guang-Jin Chen2   

  1. 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing at Karamay, Karamay 834000, China;
    2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • Received:2021-07-23 Revised:2021-12-07 Online:2022-03-28 Published:2022-04-28
  • Contact: Nan Li,E-mail:linan@cupk.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (No. 22008258), Tianshan Youth Program in Xinjiang Uygur Autonomous Region (2019Q089) and the Scientific Research Program of Universities in Xinjiang Uygur Autonomous Region (XJEDU2019Y069).

摘要: CO2 sequestration in marine sediments as solid hydrates is a potential way to capture and store anthropogenic CO2. In this study, hydrate formation from liquid CO2 in marine sediments was simulated in a glass beads bed, and the factors affecting the kinetics of hydrate formation were investigated. The results indicated that the rapid initial hydrate formation with a high driving force always increases the mass transfer resistance, which slows down hydrate growth. The final ratio of water conversion is higher under conditions of low temperature and higher pressure. A smaller particle size is conductive to initial CO2 hydrate growth, but the water conversion ratio in a bed with larger particles is slightly higher. Compared with other factors, the change in water saturation has an obvious effect on the final water conversion. To inhibit the initial hydrate formation during the injection process, in this paper, a kinetic inhibitor is proposed for pre-injection into marine sediments. This work shows that at a low pressure, a low-concentration inhibitor has an obvious inhibition effect on hydrate growth. However, at a high pressure, it is necessary to increase the concentration of inhibitor to produce an obvious inhibition effect.

关键词: Liquid CO2, Hydrate formation, Sequestration, Kinetic, Water conversion

Abstract: CO2 sequestration in marine sediments as solid hydrates is a potential way to capture and store anthropogenic CO2. In this study, hydrate formation from liquid CO2 in marine sediments was simulated in a glass beads bed, and the factors affecting the kinetics of hydrate formation were investigated. The results indicated that the rapid initial hydrate formation with a high driving force always increases the mass transfer resistance, which slows down hydrate growth. The final ratio of water conversion is higher under conditions of low temperature and higher pressure. A smaller particle size is conductive to initial CO2 hydrate growth, but the water conversion ratio in a bed with larger particles is slightly higher. Compared with other factors, the change in water saturation has an obvious effect on the final water conversion. To inhibit the initial hydrate formation during the injection process, in this paper, a kinetic inhibitor is proposed for pre-injection into marine sediments. This work shows that at a low pressure, a low-concentration inhibitor has an obvious inhibition effect on hydrate growth. However, at a high pressure, it is necessary to increase the concentration of inhibitor to produce an obvious inhibition effect.

Key words: Liquid CO2, Hydrate formation, Sequestration, Kinetic, Water conversion