The Norwegian Classification Society (DNV) has published guidelines for Onboard Carbon Capture Systems.



DNV said that the shipping industry is currently facing an energy transition and is under increasing pressure to develop effective technologies to reduce emissions. In this context, DNV has recently published new guidance for the safe installation of onboard carbon capture and storage (OCCS) systems. Different approaches to reducing greenhouse gas (GHG) emissions are necessary to achieve different emissions targets at the international, regional and national levels. The use of post-combustion carbon capture and storage technology in operating ships is expected to be one of the future solutions, especially on ships where alternative fuels are not available.

The new guidelines can be used by stakeholders along the entire value chain, including ship designers, builders, OCCS system manufacturers and shipowners, as well as for new and retrofit ships. The guidelines cover all aspects of safe installation, including exhaust gas pretreatment, the use of chemical/amine absorption, post-treatment systems, liquefaction processes, and CO2 storage and transfer systems.

Chara Georgopoulou, Senior engineer and CCS Manager on Board, Head of R&D and Consultancy at Hellenic Maritime, said: "Our new guidance for OCCS systems on board is designed to support the entire industry facing stringent emission reduction requirements. A focus on safety is critical for a new technology and must be prioritised as the industry looks to adopt sustainable fuels and CCS installations. While CCS technology is well known in the onshore industry, its use on ships is relatively immature. Our guidance provides a framework for installation that supports stakeholders in the industry, while helping to reduce emissions and drive the maritime sector towards a more sustainable future."

This guide is based on the classification requirements of DNV, but the competent authorities of the relevant flag State may add additional technical or other requirements. There are currently no legal rules regarding the possible safety implications of using OCCS systems on board ships. The guidelines also cover alternatives to carbon capture, including physical absorption and cryogenic methods.