Carbon Capture Technology World Expo
20 Oct 2025
Operating CHP plants with a 20% hydrogen admixture
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The process consists of the reduction and oxidation of iron oxide or iron: When the storage system is loaded, the added hydrogen reduces the storage medium iron oxide. The steam released in the process can be reused in electrolysis. During discharge, water vapour is fed into the storage system. This causes the iron to oxidise, releasing hydrogen.
Adding a maximum of 20% hydrogen has only a very minor impact on operating costs. It is also possible to purchase low-cost hydrogen from AMBARtec's partner network, which is currently significantly cheaper than electrolysis hydrogen.
Iron oxide-based H2 storage systems:
- Transport using standard logistics
- 100% higher efficiency in long-term electricity storage
- Efficiencies of ca. 80% for the ‘electricity-to-H2 after storage’ process through integration of an SOEC
- Up to 30% lower H2 production costs
- 50% less space required for H2 storage
- Up to 90% less water for H2 production during storage charging
- Non-hazardous goods
- Simpler and faster permit procedures
- Market-available, low-cost materials
- Fast loading/unloading
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