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  • 7 October 2025

MultiPLHY Project Achieves Breakthrough in Renewable Hydrogen Production with World’s Largest High-Temperature Electrolyzer

The pioneering MultiPLHY project demonstrating renewable hydrogen production has reached a key milestone: The consortium partners have successfully started up the world's largest multi-megawatt high-temperature electrolyzer (HTE) in an industrial environment at Neste’s renewable products refinery in Rotterdam, the Netherlands. 

The pilot project demonstrates the viability of renewable hydrogen in reducing the use of fossil hydrogen in the refining industry. Replacing hydrogen produced from fossil raw materials with renewable hydrogen is one of the key means to lower greenhouse gas emissions in refining. As a next step in the demonstration project, a test program will validate the technology's performance characteristics.

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