Seabound and Hartmann Launch Onboard Carbon Capture Pilot to Support Net-Zero Concrete

Seabound, a UK-based company, has launched an onboard carbon capture pilot project in collaboration with Hartmann Group, InterMaritime Group, and Heidelberg Materials Northern Europe.

The pilot involves installing Seabound’s containerised carbon capture system on the UBC Cork, a 5 700 GT cement carrier owned by Hartmann and managed by InterMaritime. The system uses calcium looping with slaked lime (calcium hydroxide) to absorb up to 95 % of CO₂ and 98 % of sulphur emissions, converting them into limestone stored onboard until port arrival.

Once docked at Brevik Port, Norway, the limestone will be delivered to Heidelberg Materials’ cement plant, which is already capturing 400 000 tonnes of CO₂ per year. The captured carbon is managed by Northern Lights, the first cross-border CO₂ storage hub beneath the North Sea.

Seabound’s system is modular and easily retrofitted to ships with minimal energy use, making it cost-effective compared to liquefied CO₂ systems. The project aims to support the production of net-zero concrete.

Seabound previously ran a successful pilot with Lomar Shipping and Hapag-Lloyd, capturing ~80 % of CO₂ on a 3 200 TEU container vessel. The company also demonstrated port-based capture tech at Long Beach Port, California, in April.

Seabound’s long-term goal is to capture 100 million tonnes of CO₂ annually by 2040, covering 10 % of global shipping emissions.