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  4. Conditioning of a pipeline CO₂ stream for ship transport from various CO₂ sources
 
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Conditioning of a pipeline CO₂ stream for ship transport from various CO₂ sources

Citation Link: https://doi.org/10.15480/882.1821
Publikationstyp
Journal Article
Date Issued
2017
Sprache
English
Author(s)
Engel, Frithjof  
Kather, Alfons  
Institut
Energietechnik M-5  
TORE-DOI
10.15480/882.1821
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1824
Journal
Energy procedia  
Volume
114
Start Page
6741
End Page
6751
Citation
Energy Procedia (114) : 6741-6751 (2017)
Contribution to Conference
13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland  
Publisher DOI
10.1016/j.egypro.2017.03.1806
Scopus ID
2-s2.0-85029666801
Publisher
Elsevier
In this work, the closed-cycle and open-cycle process design for the conditioning of a CO₂-stream for ship transport are compared in terms of the minimum specific energy demand. In contrast to other works, a high-pressure pipeline CO₂-stream is assumed as an input stream rather than a low pressure CO₂-stream from a capture plant. An output temperature of -50 °C is selected, which corresponds to an output pressure of 6.75 bar for pure CO₂ and output pressures of less than 25 bar for typical Post-Combustion and Oxyfuel CO₂-streams. It is shown that the minimum specific energy demand for closed-cycle refrigeration processes can be significantly reduced by a 2-stage or 3-stage temperature cascade. With approximately 46 kJ/kgCO₂, the minimum energy demand of the 3-stage open-cycle process is almost the same as for the 3-stage closed-cycle process. It is shown that the open-cycle process design cannot be used for CO₂-streams with impurities, unless the stream is purified in the refrigeration process. The results for typical Post-Combustion and Oxyfuel CO₂-streams show that the minimum specific energy demand slightly increases with an increasing impurity concentration. For the 1-stage closed-cycle process, it rises from 82.1 kJ/kgCO₂ for pure CO₂ to 83.4 kJ/kgCO₂ for an Oxyfuel stream with 98% CO₂ purity. That increase is smaller for the 2-stage closed-cycle and even smaller for the 3-stage process.
Subjects
impurities
ship transport
open-cycle
closed-cycle refrigeration
DDC Class
620: Ingenieurwissenschaften
Funding(s)
Verbund CLUSTER - TUHH - Auswirkungen von Begleitstoffen in den abgeschiedenen CO2-Strömen eines regionalen Clusters verschiedener Emittenten auf Transport, Injektion und Speicherung  
Lizenz
https://creativecommons.org/licenses/by-nc-nd/4.0/
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