• Wintershall Dea invests in hydrogen storage and transport solutions for a decarbonised energy supply
• AMBARtec's unique HyCS technology offers one of the most compact and efficient ways to store and transport hydrogen
• The HyCS storage system can flexibly get hydrogen to end consumers using standard 20-foot containers - by road, rail or sea

As part of its efforts to position itself along the hydrogen and CO2 value chains, Wintershall Dea is investing in a promising new technology for storing and transporting hydrogen developed by the Dresden-based start-up AMBARtec AG. In the latter's recent funding round, Wintershall Dea became the start-up's lead investor via its fully-owned subsidiary Wintershall Dea Technology Ventures GmbH. In addition to underlining its confidence in AMBARtec's new technology, this investment also highlights Wintershall Dea's commitment to supporting the development of a hydrogen market in Germany and Europe.

Wintershall Dea is excited about AMBARtec's unique HyCS (Hydrogen Compact Storage) technology, as the system offers what is currently the most compact as well as one of the most cost- and energy-efficient methods to store and transport hydrogen. "We are continuously expanding our carbon management and hydrogen portfolio to help enable the decarbonised economy of the future," says Hugo Dijkgraaf, Wintershall Dea's Chief Technology Officer (CTO). "To scale up the hydrogen market, it will be key to have an efficient and flexible way to transport it ­- which is precisely where AMBARtec's smart HyCS technology comes in."

The HyCS technology is based on a process of loading and unloading hydogen into a storage unit containing iron. The loading process involves reducing the iron by introducing hydrogen, which releases steam. To unload the hydrogen, steam is reintroduced into the storage unit, which oxidises the iron.

This novel technology, which has the potential to become a game changer in the storage and transportation of hydrogen, offers several advantages over conventional methods, including:

• Compactness: The HyCS technology offers the highest storage density available. For example, one litre of HyCS storage can store twice as much hydrogen as other hydrogen storage technologies - or 10 times as much energy as lithium-ion batteries.
• Cost & Energy Efficiency: This advantage in terms of compactness also translates into additional savings for transportation and storage space.
• Sustainability: Iron is available readily, widely and in sufficient quantities to serve as a storage medium.

AMBARtec's HyCS storage system uses a standard 20-foot intermodal container (TEU) that can hold 600 kg (20,000 kWh) of hydrogen. These containers, which do not have to be cooled nor bear the danger of hydrogen losses, can be transported by truck, train or ship. At present, there is only a single vessel worldwide that is capable of and purpose-built for transporting liquid hydrogen. The hydrogen, which is maintained at a temperature of -253°C, is held in a single tank with a maximum capacity of 1,250 cubic metres. In comparison, this same volume could collectively fit into just 134 containers using the AMBARtec technology. Currently, the largest container ship can carry slightly over 24,000 TEU which represent 24,000 containers of the AMBARtec system.

"With our new shareholders, we are ideally positioned to roll out our technology into all relevant markets and applications," said AMBARtec CEO Matthias Rudloff. "Wintershall Dea is opening the door to the international energy business and enabling new business cases, and private investors will push us forward to decentralised and independent power islands based on green hydrogen."

KeyFacts Energy: Wintershall Dea Germany country profile