TU Graz: System for nationwide availability of green hydrogen

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TU Graz: System for nationwide availability of green hydrogen-nationwide

As alternative drive technology in the transport sector, hydrogen plays a significant role in the energy transition. But it is not yet massive – suitable for: hydrogen is predominantly centrally generated centrally from fossil raw materials and compressed or liquefied in an expensive and energy-intensive process, so as to deliver it to gas stations. There it needs expensive infrastructure with high investment costs to store large amounts of hydrogen.

The Working Group Fuel Cells and Hydrogen Systems at the Institute of Chemical Process Engineering and Environmental Technology of the TU Graz – one of the leading international groups in the field of hydrogen research – has therefore sought for ways to make hydrogen production attractive. As part of the research project Hystorm (Hydrogen Storage via Oxidation and Reduction of Metals), the team around working group leader Viktor Hacker developed a so-called “Chemical Looping Hydrogen Method”, a new sustainable and innovative procedure for decentralized and climate-neutral hydrogen production.

This multi-winning research success resulted in a compact and space-saving on-site-on-demand system (OSOD) for gas stations and energy systems developed and distributed by the Graz Start-up Rouge H2 Engineering. This system, which is located in a conventional transport container, will become an important puzzle piece on the way to the nationwide availability of sustainable hydrogen in the future.

TU Graz: System for nationwide availability of green hydrogen-nationwide

Osod is a hydrogen generator with integrated storage device in a system. The hydrogen production is carried out by the conversion of biogas, biomass or natural gas to a synthesis gas. The energy contained therein is then stored by means of a redox method (reduction oxidation method) in a metal oxide which can be stored completely lossless and can be transported safely. The subsequent demand-oriented production of hydrogen is carried out by the supply of water into the system. The iron-based material is charged with steam and high purity hydrogen is released.

Flexible scalability

This process also makes the system interesting for smaller applications, as TU Graz-hydrogen researcher Sebastian Bock explains: “Current conventional methods for hydrogen production from biogas or gambling biomass require complex and costly gas purification processes such as pressure change adsorption – a separation process in which the hydrogen is isolated in several steps from the gas mixture “. The functions on a large scale very good, but is badly scalable to smaller, decentralized systems. “Our method generates by the redox cycle on a water vapor base but only high-purity hydrogen anyway – so no gas purification step is necessary,” says Bock.

Therefore, the OSOD system is arbitrarily scalable and are particularly suitable for decentralized applications with low feed rates in laboratories as well as smaller industrial systems, but also for larger units such as hydrogen tank stations or biogas plants for hydrogen production.

Demand-oriented flexibility

In addition to providing high purity hydrogen, Gernot Voitic, Lead Project Manager R&D at Rouge H2 Engineering, also to another advantage of the new technology: “The OSOD system can switch to standby mode with low demand and resume hydrogen production at any time if necessary. This demand-oriented release and the integrated memory are the USP of the OSOD-H2 generator, which is characterized by other similar products.”

Rouge H2 Engineering and the TU Graz Researchers are already focusing on the next step: Currently, the system in the industrial scale is still operated with natural gas. The group would like to make it usable for biogas, biomass and other regionally available raw materials. For example, biogas plants could thus be more competitive in the future and to produce green hydrogen instead of electricity, which is used for sustainable mobility concepts.

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4 thoughts on “TU Graz: System for nationwide availability of green hydrogen”

  1. … as a research object – so students learn – you can do something like that … but to assert “flakes-covering available H2” (and then worked with natural gas) … is a bit quite a …

  2. How much hydrogen can produce such a “gas station container” per day – so how many cars could be refueled? How much energy is necessary? If the hydrogen is bound here for storage in a solid, how and when will the release resp. Compression of the hydrogen so that a vehicle can be refueled? How long does it take?

  3. LOHC oil is the solution.
    LOHC fuel: Burner with hydrogen! Petrol of the future
    enter into the browser and you can see the green future!!!

  4. To paste all private cars in Germany with biogas, all fields for energy crops would have to be reserved. No idea how much area would additionally need to compensate for the conversion losses in hydrogen. And at trucks, commercial cars, diesel locomotives, ships and planes, there is not yet intended.

    This works with this system exclusively with natural gas.


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