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CO 2 Liquefaction Close to the Triple Point Pressure

Author

Listed:
  • Stian Trædal

    (SINTEF Energy Research, 7034 Trondheim, Norway)

  • Jacob Hans Georg Stang

    (SINTEF Energy Research, 7034 Trondheim, Norway)

  • Ingrid Snustad

    (SINTEF Energy Research, 7034 Trondheim, Norway)

  • Martin Viktor Johansson

    (SINTEF Energy Research, 7034 Trondheim, Norway)

  • David Berstad

    (SINTEF Energy Research, 7034 Trondheim, Norway)

Abstract

For vessel-based transport of liquid CO 2 in carbon capture and storage chains, transport at 8 bar(a) enable significant cost reductions compared to transport at higher pressures for most transport distances and volumes. Transport at even lower pressures could further reduce the costs. There are, however, concerns related to dry ice formation and potential clogging in parts of the chain that could lead to operational issues when operating close to the triple point pressure of CO 2 . In this paper, results from an experimental campaign to de-risk and gain operational experience from the low-pressure CO 2 liquefaction process are described. Six experiments using pure CO 2 or CO 2 /N 2 mixtures are presented. In four of the experiments, the liquid product pressure was continuously lowered until dry ice was detected and eventually clogged the system. In the final two experiments, the liquefaction process was run in steady-state at low liquefaction pressures for five hours to ensure that there is no undetected dry ice in the process that could lead to accumulation and operational issues over time. These experiments demonstrate that pure CO 2 can be safely liquefied at 5.8 bar(a) and a CO 2 /N 2 mixture can be liquefied at 6.5 bar(a) without issues related to dry ice formation.

Suggested Citation

  • Stian Trædal & Jacob Hans Georg Stang & Ingrid Snustad & Martin Viktor Johansson & David Berstad, 2021. "CO 2 Liquefaction Close to the Triple Point Pressure," Energies, MDPI, vol. 14(24), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8220-:d:696816
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    References listed on IDEAS

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    1. Simon Roussanaly & Han Deng & Geir Skaugen & Truls Gundersen, 2021. "At what Pressure Shall CO 2 Be Transported by Ship? An in-Depth Cost Comparison of 7 and 15 Barg Shipping," Energies, MDPI, vol. 14(18), pages 1-27, September.
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    Cited by:

    1. Choe, Changgwon & Haider, Junaid & Lim, Hankwon, 2023. "Carbon capture and liquefaction from methane steam reforming unit: 4E’s analysis (Energy, Exergy, Economic, and Environmental)," Applied Energy, Elsevier, vol. 332(C).

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