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Carbon dioxide liquefaction process for ship transportation / Ung Lee in Industrial & engineering chemistry research, Vol. 51 N° 46 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15122–15131 Titre : Carbon dioxide liquefaction process for ship transportation Type de document : texte imprimé Auteurs : Ung Lee, Auteur ; Seeyub Yang, Auteur ; Yeong Su Jeong, Auteur Année de publication : 2013 Article en page(s) : pp. 15122–15131 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Liquefaction  process Résumé : CO2 liquefaction is an essential process for long-distance ship transportation. The conventional CO2 liquefaction process employs either an external coolant or liquid expansion followed by multistage compression to obtain liquefied CO2 at low pressure. However, these processes consume considerable amounts of energy, which presents an obstacle to commercialization. Thus, the CO2 liquefaction process needs to be carefully researched and designed to reduce the operating energy. In this study, two alternative CO2 liquefaction processes are proposed and evaluated. These alternative processes use multistage expansion and multistream heat exchangers to lower the input stream temperature for the compressor. In addition, the system is operated in a more efficient manner by operating the process with an optimized compression ratio. Evaluation of the economic feasibility was performed in this study for a complete assessment of the alternative processes. As a result, about 98.1 kWh/t of CO2 was consumed for alternative process 2, which is only 91.8% of the total operating energy of existing CO2 liquefaction processes, and the CO2 liquefaction costs for alternative process 2 were reduced by 5.5%. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300431z [article] Carbon dioxide liquefaction process for ship transportation [texte imprimé] / Ung Lee, Auteur ; Seeyub Yang, Auteur ; Yeong Su Jeong, Auteur . - 2013 . - pp. 15122–15131. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15122–15131 Mots-clés : Liquefaction  process Résumé : CO2 liquefaction is an essential process for long-distance ship transportation. The conventional CO2 liquefaction process employs either an external coolant or liquid expansion followed by multistage compression to obtain liquefied CO2 at low pressure. However, these processes consume considerable amounts of energy, which presents an obstacle to commercialization. Thus, the CO2 liquefaction process needs to be carefully researched and designed to reduce the operating energy. In this study, two alternative CO2 liquefaction processes are proposed and evaluated. These alternative processes use multistage expansion and multistream heat exchangers to lower the input stream temperature for the compressor. In addition, the system is operated in a more efficient manner by operating the process with an optimized compression ratio. Evaluation of the economic feasibility was performed in this study for a complete assessment of the alternative processes. As a result, about 98.1 kWh/t of CO2 was consumed for alternative process 2, which is only 91.8% of the total operating energy of existing CO2 liquefaction processes, and the CO2 liquefaction costs for alternative process 2 were reduced by 5.5%. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300431z