Global classification society DNV has confirmed that Carbon Ridge’s centrifugal onboard carbon capture system (OCCS) can reach carbon capture rates of as high as 98 percent. This is the first maritime deployment of a centrifugal OCCS system, which during the testing was set up to capture and treat a part of the emissions stream generated by a LR2 product tanker owned by Scorpio Tankers.
The Scorpio Tankers’ pilot marks the first deployment of a centrifugal OCCS system in maritime operations, establishing Carbon Ridge as the pioneer in bringing this method of carbon capture to the shipping industry.
Results were reached using data gathered over a scheduled five-month pilot period, which commenced in July 2025 at Besiktas Shipyard in Turkey, on the 109,999 dwt, 2015-built STI Spiga as the vessel undertook regular commercial operations.
DNV reviewed and validated the associated methodologies, calculations, and reported performance metrics and based on the data provided was able to corroborate peak CO2 capture rates of over 98 percent, with 55 percent of the observations falling within a range of 86–98 percent.
Emissions Reduction
Chase Dwyer, Carbon Ridge CEO & Founder, said DNV’s evaluation validates the capability of Carbon Ridge’s modular centrifugal OCCS technology to significantly reduce the emissions of existing and newbuild vessels.
“The initial data and learnings from the STI Spiga trial further underpin our ambitions to scale Carbon Ridge’s OCCS across the global fleet. This work would not be possible without industry partners like Scorpio Tankers Inc. supporting the deployment of these critical technologies.”
Chara Georgopoulou, Head of Onboard Carbon Capture, DNV Maritime, believes independently verified carbon capture rates will be vital to building out a commercially viable business model for OCCS.
He said DNV is applying new OCCS verification Recommended Practice to make sure performance reporting can be accurately and consistently applied across the industry and to help OCCS scale. “This has been a great cooperation with Scorpio Tankers and Carbon Ridge, and we look forward to taking the next steps, moving from periodic verification to continuous assurance by using real-time data.”
Scorpio Tankers Inc. Chief Operating Officer Cameron Mackey added that Carbon Ridge’s OCCS is an attractive solution for any shipowner that foresees higher prices or stricter regulations for carbon.
“Their system is both straightforward to install and places a low operational burden on the crew. Carbon Ridge has demonstrated the technical capability and understanding required for marine deployment, and we look forward to building on this partnership.”