10 December 2022
Knutsen NYK Carbon Carriers (KNCC) is an affiliate of Nippon Yūsen Kabushiki Kaisha (NYK) Group. Note that, it has received an Approval in Principle (AiP) from the classification society DNV. Particularly, for its PCO2 tank system for liquefied CO2, LCO2 transport.
The approval, issued on 5 April, is evidently the world’s first AiP for; a cargo tank system that can marine transport and store LCO2 at ambient temperature.
The PCO2 concept is based on a cylinder-type CO2 containment system applying principles used in compressed natural gas (CNG) transportation. The CO2 storage dissipates in bundles of vertically stacked small-diameter pressure cylinders, rather than large cylindrical tanks.
As described, the concept of the PCO2 tank system is to transport LCO2; over ambient temperatures (0–10°C) and under high pressure (35–45 bar). Hence, enabling the transport of LCO2 in larger vessels and reducing costs incurred throughout the; carbon capture, utilization, and storage (CCUS) value chain.
Furthermore, transporting at ambient temperature and high pressure allows to; keep the pressure, temperature, and condition of LCO2 relatively uniform from the transport of LCO2 to injection into the seabed or underground.
It makes it easier to handle liquefied CO2 in the CCUS value chain, which also has the advantage of reducing costs throughout the CCUS value chain, the developers explain.
“KNCC, pleased to have reached an important milestone in the commercial and technical development of our company… The close cooperation with DNV, representing world-class expertise in the area of marine transportation of liquefied CO2 has been both constructive and valuable, and KNCC is now prepared to take the next step with the PCO2 technology into this emerging shipping segment. Further, our ability to form an integral part of the CCS value chain and by that contributing to reaching global climate goals is essential both to our owners and KNCC.”Anders Lepsøe, CEO of KNCC
KNCC presents a newly formed joint venture company by NYK and Norway’s vessel operator Knutsen Group for the commercial development of an LCO2 marine transportation and storage business worldwide.