Comparison and Selection of Pressurization Process of Supercritical CO2 Pipeline Transportation in First Station
The comparison and selection of process flow for supercritical CO2 pipeline transportation has a significant impact on the economy evaluation of CO2 capture,utilization and storage technology.As an illustration,two types of n+1 multistage pressurization process flows were established.The pressurization process from normal temperature and pressure to 14 MPa of CO2 with a capacity of 5×106 t/a was simulated.The present value of the total cost of the first station under different pressurization processes and different numbers of pressurization stages was compared.The results indicate that under conditions of an operation time of 30 years,a base discount rate of 8%,and pressurization stages of 4,5,and 6,the present value of the total cost of the new supercritical CO2 pipeline first station can be reduced by 5.51%,5.85%,and 6.03%respectively,by the n+1 compressor+pump combination pressurization process as compared with the n+1 compressor multistage pressurization process.The findings of the research may provide a reference point for the pressurization method of the first station on a supercritical CO2 pipeline.
CO2transportationsupercriticalpressurizationprocess flowcomparison and selection
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