https://newatlas.com/marine/seabound-marine-carbon-capture/

Seabound, a London startup, in collaboration with global shipping company Lomar, has successfully conducted a pilot project aimed at decarbonizing marine emissions. Utilizing a prototype carbon capture system installed on a medium-sized container ship, they achieved a remarkable 78% capture rate for CO2 emissions, with potential for up to 95% efficiency in the future. The system, compactly designed to fit within shipping containers, employs quicklime to convert captured CO2 into limestone pebbles, which can be sold for profit. Despite the challenges posed by the bulkiness of the system relative to ship tonnage and the enormity of emissions from cargo vessels, Seabound's innovation offers a promising step towards mitigating the significant carbon footprint of the shipping industry. The success of this project underscores the potential for onboard carbon capture solutions to contribute to emissions reduction efforts in the transitional period ahead, demonstrating a feasible and economically viable pathway to decarbonization without waiting for alternative fuels or technologies.