ClassNK Releases Guidelines for Onboard CO2 Capture and Storage Using Membrane Separation

ClassNK has released "Guidelines for Onboard CO2 Capture and Storage Systems (Edition 2.0)", which assesses onboard CO2 capture systems (OCCS) using membrane separation. The guidelines can be used to support the safe development, manufacturing, and installation of a relevant system.

CO2 capture from ship exhaust gas is growing in popularity 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.

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

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

The guidelines are available to download via ClassNK's website www.classnk.com.