China Develops the World’s First Megawatt-Scale Seawater Electrolysis System
China’s First Megawatt-Scale Seawater Electrolyzer
China has achieved a major milestone in green energy by developing the world’s first megawatt-scale seawater electrolysis system for hydrogen production. This breakthrough technology enables the production of clean and cost-effective hydrogen directly from seawater, paving the way for a more sustainable energy future.
According to reports, the China National Offshore Oil Corporation (CNOOC) has successfully commissioned the world’s first megawatt-scale seawater electrolysis system for hydrogen production. The achievement represents a significant advancement in the development of offshore renewable energy technologies. As reported by Science and Technology Daily, the system successfully completed its operational testing and has been recognized as a major innovation in the marine energy sector. Its modular design integrates the main components into five standard shipping containers, allowing for rapid deployment and installation in offshore environments.
The electrolyzer is capable of producing approximately 4,800 cubic meters of ultra-high-purity hydrogen (99.999%) per day. The electricity required for the process is supplied by offshore wind and solar farms, significantly reducing greenhouse gas emissions associated with hydrogen production. One of the system’s most notable advantages is its ability to use seawater directly without requiring conventional desalination pretreatment. Engineers at CNOOC developed an innovative corrosion-resistant system that overcomes the challenges posed by seawater salts, ensuring reliable, stable, and cost-effective long-term operation.
This breakthrough demonstrates the potential for a new hydrogen-based energy model for offshore industries. The green hydrogen produced by the system can be used as a clean fuel for ships, offshore platforms, and other marine equipment, contributing to lower carbon emissions and supporting the global transition to sustainable energy.