SHIPPING METHOD FOR CO2 STORAGE AND IMPORT OF CNG

摘要

Disclosed is a method of transporting C02 by ship for the purpose of storage in the ocean. The C02 is transported at a temperature between -25°C and +25°C, and under a pressure that is sufficiently high for the C02 to be in a liquid or supercritical state. The choice of temperature/pressure conditions for the C02 enables the transport of C02 one way to be effectively combined with transport of compressed natural gas (CNG) the other way. Ships can be used that have relatively cheap tubular containment equipment similar to the type normally used for CNG but with lower pressure and not subject to cyclic thermal and mechanical effects of pressurizing and depressurizing.