DLR
A new offshore test platform off Germany’s North Sea coast is now operational, harnessing seawater, air, and wind to generate entirely clean hydrogen. Designed as a modular system, it also integrates several other sustainable energy technologies.
Harnessing Wind for Onboard Electrolysis
Part of the H2Mare initiative, this platform capitalizes on the strong and consistent wind conditions at sea to power an onboard turbine. The electricity generated is then directed to two proton-exchange membrane (PEM) electrolyzers, which split seawater into hydrogen and oxygen—offering a cleaner hydrogen production process that avoids the high carbon footprint typical of conventional methods.
However, using seawater directly in electrolysis presents challenges. To address this, the platform repurposes the heat from the electrolyzers to run an onboard desalination unit. This setup allows researchers to explore whether using freshwater rather than saltwater improves efficiency in hydrogen generation.
Beyond hydrogen production, the H2Mare system is equipped to operate a Fischer-Tropsch synthesis unit that combines hydrogen with carbon monoxide extracted from the atmosphere. This enables the creation of synthetic fuels such as gasoline and diesel. Researchers will also explore the green synthesis of other fuels, including ammonia, methanol, and liquid methane.
Testing Scalability and Operational Logistics
Alongside the scientific experimentation, a core goal of the project is to evaluate the practicalities of planning, constructing, and operating such offshore platforms at scale.
“We aimed to test the full development process—from permits and construction to real-world deployment—to help shape future concepts for larger-scale production platforms,” explained Roland Dittmeyer, director of the Institute for Micro Process Engineering at the Karlsruhe Institute of Technology and leader of the “PtX-Wind” segment of H2Mare, which focuses on converting green hydrogen into other fuels.
Initial operations are taking place in the port of Bremerhaven, with plans to relocate the platform to open waters near the Helgoland archipelago. Although this is the first floating wind-powered platform to demonstrate the production of multiple fuels from renewable sources—under the Power-to-X concept—it follows in the footsteps of the Sealhyfe platform, which began generating green hydrogen at sea in 2023.
Read the original article on: New Atlas
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