http://en.people.cn/n3/2024/1223/c90000-20257251.html

CenerTech is a subsidiary of China National Offshore Oil Corporation (CNOOC).

A megawatt-class seawater electrolysis plant pilot facility of CenerTech has now completed a trial run for delivering hydrogen with a purity level of 99.999 percent, using offshore wind and solar power The facility has a rated output of 200 standard cubic meters of hydrogen per hour and integrates core operations such as current processing, seawater electrolysis and hydrogen purification in five containers, forming a compact and portable structure suitable for offshore platforms. It has been engineered to accommodate the inherent variability and intermittency of offshore wind and solar power, providing an effective solution for the on-site utilization of renewable energy resources. CenerTech’s new equipment has enabled direct seawater electrolysis without desalination, thereby cutting costs and ensuring stable, long-term hydrogen production.

Seawater is a plentiful resource for hydrogen production. Seawater electrolysis allows unstable green electricity to be converted into green hydrogen, which is easier to store and transport. Yet the composition complexity of seawater poses challenges such as catalyst degradation and intense side reactions.

Earlier this week, Sinopec reported a factory-scale research project to produce hydrogen from seawater with an hourly output of 20 cubic meters of green hydrogen.