The second edition of the Onboard CO₂ Capture and Storage Systems guidelines is expected to apply to a wide variety of vessel types. Supporting the safe development, manufacturing, and installation of these systems,

Tokyo - ClassNK has released "Guidelines for Onboard CO2 Capture and Storage Systems (Edition 2.0)", the first in the world, which assumes onboard CO2 capture systems (OCCS) using the membrane separation method, which are expected to apply to a wide variety of vessel types. The guidelines can support the safety development, manufacturing, and installation of the relevant system. 

Exhaust gas is growing as a way to reduce GHG emissions,

Not only fuel transition, but interest in capturing CO2 from ships' exhaust gas is growing as a way to reduce GHG emissions, and the development of onboard systems for capturing and storing CO2 is being undertaken. In 2023, ClassNK published the first edition of the "Guidelines for Onboard CO2 Capture and Storage Systems," which outlined requirements for OCCS using the amine absorption method.

Requirements for OCCS

In the newly issued Edition 2.0, the guidelines have been expanded to include requirements for OCCS using the membrane separation method, which has a lower energy requirement compared to the amine absorption method and does not require a permanent supply of amine solution.

Reorganized the fundamental functional requirements 

In addition, ClassNK has reorganized the fundamental functional requirements for OCCS, extracted common requirements across different capture methods, and compiled them into a set of generic requirements that should apply regardless of the specific capture method.

Related: ClassNK awards world’s first MASS notation to domestic container ship “Genbu.”
The guidelines are available for download from ClassNK's website at www.classnk.com for those who have registered for the ClassNK "My Page".https://www.classnk.or.jp/account/en/Rules_Guidance/ssl/guidelines.aspx

About: ClassNK

ClassNK is registered as “Nippon Kaiji Kyokai General Incorporated Foundation” in accordance with applicable Japanese law. As ClassNK is a technically oriented, private foundation and its principal mission of ship classification serves the public interest, it is a non-profit foundation recognized as a general incorporated foundation (Ippan Zaidan Houjin) in Japan.
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