Optimization and economic evaluation of carbon dioxide BOG Re-liquefaction process considering storage pressure and nitrogen impurity

Ijun Jeong, Yoonju Jeon, Hongkyoung Shin, Jaejun Lee and Youngsub Lim

Energy, 2025, vol. 323, issue C

Abstract: The increasing demand for carbon capture and storage (CCS) has heightened the need for liquefied carbon dioxide (LCO2) carriers, which require re-liquefaction systems to manage boil-off gas (BOG) generated during transportation. This study proposed new two-stage separation re-liquefaction processes with mixed refrigerants for CO2 BOG containing nitrogen impurity. The proposed processes were evaluated and compared with conventional processes based on annual CO2 emissions under different storage pressure conditions of 6.5 bar and 15 bar. The results demonstrated that the proposed processes reduced annual CO2 emissions by up to 71.6 % and 35.6 % at the storage pressure of 6.5 bar and 15 bar, respectively. Furthermore, the economic feasibility was assessed by considering annual CO2 emissions and annual transported CO2 amount under both pressure conditions. The results indicated that the cases of storage pressure at 6.5 bar resulted in lower costs due to reduced tank costs and the higher density of LCO2.

Keywords: Liquefied CO2 carrier; Boil-off gas; Re-liquefaction; Two-stage separation; Mixed-refrigerants; Annual CO2 emission; Cost per transportation (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225014793
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:323:y:2025:i:c:s0360544225014793

DOI: 10.1016/j.energy.2025.135837

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().