RESEARCH ARTICLE
A comparative study of modified Linde and cryogenic cooling for CO2 separation
Nandakishora Y,
Ranjit K. Sahoo,
Murugan S,
Nandakishora Y
Department of Mechanical Engineering, National Institute of Technology, Rourkela, India
Search for more papers by this authorRanjit K. Sahoo
Department of Mechanical Engineering, National Institute of Technology, Rourkela, India
Search for more papers by this authorCorresponding Author
Murugan S
Department of Mechanical Engineering, National Institute of Technology, Rourkela, India
Correspondence
Murugan S, Department of Mechanical Engineering, National Institute of Technology, Rourkela, India.
Email: [email protected]
Search for more papers by this authorNandakishora Y,
Ranjit K. Sahoo,
Murugan S,
Nandakishora Y
Department of Mechanical Engineering, National Institute of Technology, Rourkela, India
Search for more papers by this authorRanjit K. Sahoo
Department of Mechanical Engineering, National Institute of Technology, Rourkela, India
Search for more papers by this authorCorresponding Author
Murugan S
Department of Mechanical Engineering, National Institute of Technology, Rourkela, India
Correspondence
Murugan S, Department of Mechanical Engineering, National Institute of Technology, Rourkela, India.
Email: [email protected]
Search for more papers by this authorSummary
The separation of carbon dioxide (CO2) from the flue gas is a challenging one in terms of the energy penalty. The development of a cryogenic or low-temperature CO2 separation method helps to overcome the energy penalty associated with CO2 separation. In this study, a preliminary investigation is carried out in a theoretically modified Linde process which can be used for CO2 separation from a gas mixture containing CO2 and N2. A cryogenic cooling process is also studied for CO2 separation of the same quality of the gas mixture. The compression work and cooling loads in each case are analyzed using Aspen Plus software. The effect of CO2 volume in the mixture, compressor efficiency, and compressor discharge pressure on the energy consumption is studied for both the theoretically modified Linde and the cryogenic cooling processes, and the results are compared between them. The results indicated in the CO2 separation by the cooling process are better than the modified Linde process. The energy penalty shows for 20% CO2 composition of separation by the cooling process with the single-stage compression is lower by around 123.9% and 128.8% in terms of compression work and compressor cooling load, respectively, than those of the modified Linde process working in a single-stage compression. The separation by the cooling process refrigeration effect is 15.9% more than in the modified Linde process.
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