摘要：In order to mitigate the global warming, reduction of CO2 emissions has become a great concern in the world. Carbon dioxide Capture and Storage (CCS) is a possible measure to curtail CO2 emissions to the air while using fossil fuel energy, and is now broadly expected as an enabler for the coexistence of the existing energy supply chain and the deep reduction of CO2 emission. The author et al. proposed 'CO2 shuttle shipping and direct injection from the ship' for applying offshore CCS to Japan, whose advantages are mitigating the necessity of source-sink matching, the deep water application outside the coastal zone, the avoidance of large offshore facilities, etc. In this paper, the margin of the transport system in a large-scale integrated project is discussed. The intermediate buffer capacity at the connection to the plant on land, the additional capability of ship transport, etc. as the necessary margins are preliminarily estimated considering the realistic wave data in the sea near Japan.
