Carbon Ridge Achieves 98% CO₂ Capture Rate in Landmark Maritime Trial
Carbon Ridge has achieved a significant milestone in maritime decarbonisation after an independent assessment by DNV confirmed that its centrifugal onboard carbon capture and storage (OCCS) system reached peak carbon dioxide capture rates of 98% during a pilot installation aboard a tanker operated by Scorpio Tankers Inc..
The verification was conducted using DNV’s Recommended Practice for onboard carbon capture performance assessment and marks the first independent validation of a centrifugal OCCS system deployed in commercial maritime operations. The pilot was carried out aboard the STI Spiga, a 109,999 dwt LR2 product tanker owned by Scorpio Tankers, over a five-month period beginning in July 2025.
According to DNV’s technical evaluation, the system achieved peak CO₂ capture rates exceeding 98%, while 55% of recorded observations fell within a capture range of 86% to 98%. The technology was configured to capture and process a portion of the vessel’s exhaust emissions while the ship continued normal commercial operations.
The trial represents the first maritime deployment of centrifugal carbon capture technology and provides an important proof of concept for shipowners seeking practical solutions to comply with increasingly stringent emissions regulations and rising carbon costs.
Carbon Ridge chief executive and founder Chase Dwyer said the independent validation demonstrates the capability of the company’s modular OCCS technology to substantially reduce vessel emissions and supports plans for broader deployment across the global shipping fleet. He added that the results provide a foundation for scaling the technology on both existing vessels and newbuilds.
DNV’s Head of Onboard Carbon Capture, Chara Georgopoulou, said independently verified performance data will be critical in establishing commercially viable business models for onboard carbon capture systems. She noted that standardised verification frameworks are essential to ensuring performance claims can be measured consistently as the technology moves towards wider adoption.
Scorpio Tankers Inc. chief operating officer Cameron Mackey described the system as an attractive option for shipowners anticipating tighter carbon regulations or higher carbon pricing. He said the technology is relatively straightforward to install and places a low operational burden on vessel crews, while demonstrating the technical readiness required for marine applications.
The successful pilot comes as the global shipping industry faces mounting pressure to reduce greenhouse gas emissions in line with international climate targets. While alternative fuels remain a key pathway to decarbonisation, onboard carbon capture is increasingly being explored as a complementary solution capable of reducing emissions from existing fleets without requiring immediate fuel switching.
The STI Spiga trial positions Carbon Ridge among the early movers in maritime carbon capture technology and highlights growing industry interest in onboard emissions reduction systems as shipping companies seek practical pathways towards compliance and long-term decarbonisation.
