ClassNK grants approval to KNCC’s LCO2 carrier concept

Knutsen NYK Carbon Carriers (KNCC), a subsidiary of shipping firms Nippon Yusen Kabushiki Kaisha (NYK) and Knutsen Group, has received approval from Japanese classification society ClassNK for the design of liquid carbon dioxide (LCO2) carriers.

PHOTO: Illustration of FLSU concept. NYK

The LCO2 carrier design utilizes the elevated pressure (EP) method to store and transport liquefied CO2 at ambient temperature.

Developed by KNCC, this technology ensures LCO2 remains in a stable state. Since it does not require cooling to cryogenic temperatures, handling is easier, and energy and liquefaction costs are potentially lower, NYK stated.

Additionally, NYK, KNCC, and oil company ENEOS Xplora have collaborated to develop a Floating Liquefied Storage Unit (FLSU). This unit integrates the isenthalpic Expansion Cooling & Liquefaction Process, which has been jointly researched and developed by the three companies.

The isenthalpic Expansion Cooling & Liquefaction Process cools and liquefies CO2 by reducing its pressure without heat exchange.

The FLSU concept liquefies and temporarily stores CO2 collected and transported as gas from an onshore facility, preparing it for further transport by LCO2 carriers.

By Tuhin Roy

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