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Chinese researchers have developed a carbon recycling system that captures oceanic carbon dioxide and converts it into succinic acid, a feedstock for biodegradable plastics. The system operated in Shenzhen Bay for over 530 hours, achieving a 70% carbon capture efficiency.

Led by GAO Xiang and XIA Chuan, the project demonstrates the complete process from marine CO2 capture to usable chemical feedstock, costing $230 per metric ton of CO2. The process involves an electrochemical reactor that splits water and separates CO2, which is then reduced to formic acid using a bismuth-based catalyst.

A marine bacterium, Vibrio natriegens, ferments the formic acid into succinic acid. The modular system can also produce various chemicals, contributing to a low-carbon economy. Researchers suggest integrating the system with offshore renewable energy sources to enhance efficiency and sustainability.