Onboard Carbon Capture

Onboard carbon capture and storage captures CO2 from a ship’s engine and boiler exhaust, typically by amine absorption, then compresses and liquefies it for storage in deck tanks until landing at a reception facility. It is positioned as a way to cut net CO2 from existing fuels without changing the engine. The technology is at demonstration stage, with parasitic energy demand, capture-rate, tank-volume, and accounting questions unresolved, including whether the IMO and the EU MRV and ETS regimes will credit captured carbon. No mandatory IMO standard yet governs its measurement or crediting.