Carbon dioxide liquefaction process for ship transportation
- Carbon dioxide liquefaction process for ship transportation
- 이웅; Seeyub Yang; Yeong Su Jeong; Youngsub Lim; Chi Seob Lee; Chonghun Han
- Issue Date
- Industrial & engineering chemistry research
- VOL 51, NO 46-15131
- 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%.
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