TU Graz researchers produce high purity hydrogen from real biogas

In Austria, researchers at Graz University of Technology (TU Graz) are continuing the Biogas2H2 project. In one of the world’s largest industry-related demonstration plants, they produce high-purity hydrogen directly at an existing biogas plant from real biogas, which includes all the impurities that are present in the gas. The project is funded by the Austrian Research Promotion Agency FFG.

Rouge H2 Engineering and TU Graz built the demonstration plant on the company’s premises in Mureck in summer 2021 and it will be in operation for testing purposes until the end of October. The 10-kilowatt plant diverts about one per cent of the biogas flow (about 30 litres per minute) and mixes it with steam. The mixture flows into the plant’s reactor. There, the biogas is reformed and syngas produced. This gas subsequently reduces iron oxide to iron. Then steam enters the reactor, which reoxidizes the iron back to iron oxide. This releases hydrogen with a purity level of 99.998 per cent.

More on the story.