Allseas will play a key construction role in the realisation of the Porthos carbon capture and storage (CCS) project in the Port of Rotterdam, the first development of its kind in the Netherlands.
Porthos, a partnership between EBN, Gasunie, and the Port of Rotterdam Authority, will transport CO2 from industrial sites in the port area to empty gas fields in the Dutch North Sea, where it will be permanently stored up to 4 km beneath the seabed.
Allseas has been selected to construct the subsea pipeline. Starting in 2025, the work includes installation, burial, and commissioning of the 16-inch CCS pipeline connecting a compressor station on the Maasvlakte with the P18-A platform approximately 20 km offshore.
Pipelay will be executed by Allseas’ dynamically positioned S-lay vessel Lorelay, with construction support from Oceanic. The vessels can be positioned precisely and safely in the busy waters around Rotterdam, the busiest and largest port in Europe.
Operational by 2026, Porthos is expected to reduce the Netherland’s annual CO2 emissions by about 2%. The pipeline will transport about 2.5 million tonnes of CO2 per year for 15 years to the North Sea storage site.
The EU has recognised Porthos as an important “Project of Common Interest” in meeting climate targets and awarded a EUR 102M subsidy to accelerate development.