Economic Evaluation of CO2 Liquefaction Processes for Ship-based Carbon Capture and Storage (CCS) Chain

摘要

This study evaluated process options for CO_2 liquefaction for shipbasedCarbon Capture and Storage (CCS) and determined the optimalprocess. Two types of liquefaction processes, an open cycle and aclosed cycle, were suggested. CO_2 is compressed and expanded as therefrigerant in open cycle, while closed cycle utilizes externalrefrigerants to liquefy CO_2. Design variables, such as pressure andtemperature, were optimized for each liquefaction process. Life CycleCost (LCC) analysis was utilized for the evaluation of the candidateprocesses. CAPEX (Capital Expenditure) and OPEX (OperationalExpenditure) were taken into account in the LCC.