Prototyp des Nugget-Behälters der AMBARtec AG zur Installation im 6000-L-Wasserstoffspeicher
15. December 2025in Meet AMBARtec, Cooperations, Cooperations, Meet AMBARtec, Press Release, Press Release

Nugget vessel for 6000-liter hydrogen storage system certified


AMBARtec and Purem by Eberspächer prepare for series production.

Dresden, Esslingen, December 15, 2025 – The renowned testing institute LRQA Germany has tested and approved the design of the nugget vessel for AMBARtec's 6,000-litre storage system. AMBARtec and Purem by Eberspächer are intensifying their cooperation in preparation for the series production of the H2compact 6000.

The H2compact 6000 is going into series production.
Following successful testing in accordance with the Pressure Equipment Directive 2014/68/EU, the 6,000-litre Nugget vessel storage system has cleared all hurdles and will receive its CE certificate shortly. ‘This marks a significant milestone for series production,’ reports Matthias Rudloff, CEO of AMBARtec. 'We are delighted to have Purem by Eberspächer as an experienced and committed partner, who are now pressing ahead with preparations for series production at its site in Wilsdruff, Saxony. Next year, our customers will be able to purchase the first containers, after which we plan to ramp up production to several hundred containers," he continues.

Start of industrialisation at the Purem by Eberspächer plant in Wilsdruff
The exhaust and acoustics specialist is preparing for the series production of pressure vessels by developing a modular production concept. Thanks to its existing expertise in industrialisation and many years of experience in steel processing, Purem by Eberspächer is well placed to translate the AMBARtec prototype design into scalable production. To meet the stringent requirements of welding technology, the company is providing its production staff with targeted further training.

A long-term partnership that goes beyond container manufacturing.
 Purem by Eberspächer has been involved in designing and developing AMBARtec's containers since the two companies began collaborating in January 2025. For its part, the company, headquartered in Esslingen near Stuttgart, is integrating AMBARtec into its existing business relationships. "By connecting us with strategic partners, including those in the steel industry and other companies in the hydrogen economy, Purem by Eberspächer is opening up new market segments for us," emphasises AMBARtec's Chief Technical Officer, Uwe Pahl. 'This involves both the storage and transport of hydrogen, as well as our offer to supply companies with silver hydrogen.' This is recycled hydrogen, produced as waste gas in various sectors of the economy, which can be captured and reused with AMBARtec storage technology.

800 kg of hydrogen per container.
 The H2compact 6000 Plus has a storage capacity of 800 kg of hydrogen or 26 MWh. Installed in conventional 20-foot containers, it can be transported using standard logistics methods, such as lorries, ships, rail and cranes. No adjustments to the infrastructure are necessary, nor are there any lengthy approval procedures under the Federal Immission Control Act (BImSchG) or the Hazardous Incident Ordinance. Extensive operational testing has confirmed the cycle stability of the storage material, making the containers suitable for continuous use.

Pressekontakt:  

Dr. Ines Bilas

AMBARtec AG

Head of Marketing and Communication

Phone:  +49 172 234 11 00

E-Mail: ines.bilas@ambartec.de

Website: www.ambartec.de 

20. October 2025in Lectures, Meet AMBARtec

Online webinar ‘Hydrogen in the chemical industry’


Online webinar ‘Hydrogen in the chemical industry’
30 October 2025, 10:00-11:00 a.m.
with Matthias Rudloff, CEO AMBARtec

Hydrogen is one of the most important raw materials in the chemical industry. This webinar will explore various ways in which processes in the industry can be made more climate-friendly while reducing costs.  

Switching energy supply – even partially – to hydrogen
Companies do not have to wait until the hydrogen grid is in place to do this. With AMBARtec's partner network, they can already obtain hydrogen at competitive prices from 2026 onwards – without having to make costly adjustments to their existing infrastructure.  

Making economic use of existing hydrogen
Various industries and research institutions produce hydrogen that is currently released into the environment unused for technical or economic reasons. With the help of AMBARtec storage systems, it is possible to collect this hydrogen and to re-use it without major refitting.  

Refining high-energy residual gases into hydrogen
Numerous industrial processes produce residual gases, which are currently only used for energy purposes, with high CO2 emissions or complex exhaust gas aftertreatment. However, based on the iron-steam process, these residual gases can also be used to produce high-quality hydrogen.  

In the webinar, participants will learn more about the technological base and how it could be implemented in inustrial companies.

The event is organised by the North-East Section of the German Chemical Industry Association (Verband der Chemischen Industrie e. V.) and the HYPOS Association, with the kind support of the Saxony Trade & Invest Corporation.  

The webinar will be held in German. Participation is free of charge. Registration is required to receive the access details:

Register here

Pressekontakt:  

Dr. Ines Bilas

AMBARtec AG

Head of Marketing and Communication

Phone:  +49 172 234 11 00

E-Mail: ines.bilas@ambartec.de

Website: www.ambartec.de 

20. October 2025in Fairs & Exhibitions, Meet AMBARtec

Hydrogen Technology Expo: AMBARtec enables CHP operators to partially switch to hydrogen


A first step towards climate-neutral municipal heat supply.
DRESDEN, 17 October – At the Hydrogen Technology Expo (21–23 October) in Hamburg, AMBARtec will show how municipal utilities can run their combined heat and power plants (CHP) partially with hydrogen at low cost, thereby greatly reducing their CO2 emissions. This can be done by mixing hydrogen with natural gas. It works thanks to iron oxide hydrogen storage systems. No infrastructure conversion is required. Visitors to the AMBARtec stand in Hall 2, Stand E15, can find out how they can convert their power plants.

20% hydrogen without changing how energy is produced.
'You can add up to 20% hydrogen to natural gas without having to replace the gas engines you already have,' says Matthias Rudloff, the CEO of AMBARtec. 'Our iron oxide-based storage systems are not classified as hazardous materials, so there is no need for them to undergo lengthy approval procedures or to have additional special safety measures in place. Operators of CHP plants only need a discharging unit; the hydrogen is delivered to them in containers via iron nuggets.'

Keep operating costs stable
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. This is recycled hydrogen from a closed-loop system: Numerous companies and research institutions produce hydrogen that is released into the environment unused for technological and economic reasons. AMBARtec's storage systems can absorb it and in this way the hydrogen can bei reused safely and cost-effectively.  

Achieving sustainability goals
The gradual conversion of municipal heat supply to climate-friendly hydrogen makes a substantial contribution to enabling cities and municipalities to meet their sustainability obligations. ‘By adding hydrogen in a first step, municipal energy suppliers can also gain initial experience with this energy source without fundamentally changing their operating procedures or requiring high investments. The iron nuggets are transported in conventional 20-foot containers by truck. This means that every municipal utility can be reached easily and quickly,’ says Matthias Rudloff, pointing out further advantages.  

About AMBARtec:  
AMBARtec AG, based in Dresden, is an innovation leader in the field of iron oxide-based hydrogen storage systems. The process consists of the reduction and oxidation of iron oxide or iron: During storage, the added hydrogen reduces the iron oxide storage medium. The vapor released in the process can be reused in electrolysis. During discharge, water vapour is added to the storage unit at the point of use. This causes the iron to oxidise, releasing hydrogen.

The results of multi-stage practical tests at the demonstration plant in Freiberg confirm the excellent energy balance of the entire process, from hydrogen production to storage unit filling, transport and discharge of the hydrogen. Optimum system integration of high-temperature electrolysis (SOEC) enables efficiencies of more than 80 per cent to be achieved. The possible applications of the AMBARtec storage system range from highly efficient energy storage to the safe transport of hydrogen, even over long distances, and hydrogen drives in shipping.

In collaboration with Rouge H2 Engineering AG, AMBARtec also offers an alternative process based on iron oxide nuggets to produce high-purity hydrogen from dirty gases such as blast furnace gases and synthesis gases from biogenic residues or sewage sludge. Together with CCS/U, this steam-iron process could make steelworks climate-neutral at a reasonable cost.

Press contact:  

Dr. Ines Bilas

AMBARtec AG

Head of Marketing and Communication

Phone:  +49 172 234 11 00

E-Mail: ines.bilas@ambartec.de

Website: www.ambartec.de 

24. September 2025in About AMBARtec

The Path to a Climate-Neutral Steel Mill. Interview with AMBARtec, Part II


The success of the German steel industry in decarbonising its production processes depends on the technological processes involved. In the first part of the marketSTEEL interview, AMBARtec CEO Matthias Rudloff presented the iron-steam process as a cost-effective and less labour-intensive alternative to direct reduction.  

However, economic policy conditions also play a decisive role. Dagmar Dieterle, editor and founder of the information platform, asked Matthias Rudloff for his assessment on this topic as well.  

Read the current part of the interview here. (only available in German).  

The first part of the interview, published in July, can be read here.  
31. July 2025in About AMBARtec

The Path to a Climate-Neutral Steel Mill. Interview with AMBARtec


The German steel industry faces the challenging task of decarbonising its production processes. However, previous strategies, such as direct reduction with hydrogen, have various disadvantages. The iron-steam process is a cost-effective alternative that can be implemented with significantly less effort.

Dagmar Dieterle, editor and founder of marketSTEEL — the information platform for the steel and metal industry — spoke with Matthias Rudloff, CEO of AMBARtec, about this topic.  

Read the first part of the interview here (only available in German).  

The second part will be published at the end of September.