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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

Optimal design and decision for combined steam reforming process with dry methane reforming to reuse CO2 as a raw material / Youngsub Lim in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4982-4989 Titre : Optimal design and decision for combined steam reforming process with dry methane reforming to reuse CO2 as a raw material Type de document : texte imprimé Auteurs : Youngsub Lim, Auteur ; Chul-Jin Lee, Auteur ; Yeong Su Jeong, Auteur Année de publication : 2012 Article en page(s) : pp. 4982-4989 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Raw  materials  Carbon  dioxide  Reuse  Steam  reforming  Optimal  design Résumé : Carbon dioxide (CO2) conversion technology has been estimated as a potentially practical solution for global warming problems although it still has some weaknesses such as cost and energy consumption. In this study, a combined steam reforming process with dry methane reforming process for the CO2 treatment was investigated. Because the dry methane reforming process could generate synthesis gas from carbon dioxide, it could decrease the CO2 emissions from the existing steam reforming process. Models for the steam reforming process and the combined process were developed and extended mitigation cost was suggested to evaluate CO2 reduction of the overall process. The combined process could reduce net CO2 emission by 67% compared with the reference steam reforming process, and the extended mitigation cost of the combined process ranged from 21 to 26.5 (US$/CO2 ton) according to the change of the cost for CO2 transportation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25777937 [article] Optimal design and decision for combined steam reforming process with dry methane reforming to reuse CO2 as a raw material [texte imprimé] / Youngsub Lim, Auteur ; Chul-Jin Lee, Auteur ; Yeong Su Jeong, Auteur . - 2012 . - pp. 4982-4989. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4982-4989 Mots-clés : Raw  materials  Carbon  dioxide  Reuse  Steam  reforming  Optimal  design Résumé : Carbon dioxide (CO2) conversion technology has been estimated as a potentially practical solution for global warming problems although it still has some weaknesses such as cost and energy consumption. In this study, a combined steam reforming process with dry methane reforming process for the CO2 treatment was investigated. Because the dry methane reforming process could generate synthesis gas from carbon dioxide, it could decrease the CO2 emissions from the existing steam reforming process. Models for the steam reforming process and the combined process were developed and extended mitigation cost was suggested to evaluate CO2 reduction of the overall process. The combined process could reduce net CO2 emission by 67% compared with the reference steam reforming process, and the extended mitigation cost of the combined process ranged from 21 to 26.5 (US$/CO2 ton) according to the change of the cost for CO2 transportation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25777937