Captura Kona Ocean Direct Air Capture Project

The Captura Kona Ocean Direct Air Capture Project is a pilot-scale direct ocean capture (DOC) facility located in Kona, Hawaii, designed to remove carbon dioxide from seawater to enable net atmospheric CO₂ removal. The project uses an electrochemical process to extract dissolved CO₂ from seawater, which in turn enhances the ocean’s natural ability to absorb additional CO₂ from the atmosphere. The captured CO₂ stream can be directed to permanent geological sequestration or supplied as a feedstock for low-carbon fuels and industrial applications. The Kona facility is designed to capture approximately 1,000 tonnes of CO₂ per year, serving as a technology validation platform for Captura’s larger commercial DOC systems, which are planned to scale to tens of thousands of tonnes of CO₂ annually. The project is supported through partnerships with major energy and industrial stakeholders and represents one of the first operational demonstrations of ocean-based carbon removal technology in the United States.