Modeling and Simulation of Ship Transport of CO2

With growing concern about greenhouse gas emission, previous carbon capture and storage (CCS) research has mainly focused on efficient capture methods. However, there is a relative lack of studies on ship transport and offshore unloading. The available guidelines, if any, are simply suggested without a systematic analysis from the viewpoint of the optimal transport chain system. Thus, this study addresses the issue by modeling the ship-based transport network of CO2. In particular, liquefaction, boil off gas (BOG) reliquefaction and offshore unloading processes are investigated to provide essential guidelines in terms of an optimal thermodynamic state (pressure-temperature: P-T). Optimal compression ratio and pressure-enthalpy flash are implemented on each compression-intercooling-separation stage, and a conceptual model for BOG reliquefaction process is also proposed.