Siemens To Supply PEM Electrolyzer

By Mike Brezonick18 November 2019

German steelmaker Salzgitter Flachstahl GmbH (SZFG) has awarded the contract to build a 2.2 MW proton exchange membrane (PEM) electrolysis plant to Siemens Gas and Power.

The plant is due to commence operation in the fourth quarter of 2020 and cover SZFG’s entire current demand for hydrogen. The necessary electrical power will be generated by seven wind turbines with a capacity of 30 MW. These will be erected by Avacon AG on the Salzgitter Group site and will likewise enter service from 2020.

“Weare proud to be pioneers in the industrial application of hydrogen in the steelindustry,” said Salzgitter AG Executive Board Chairman Prof. Heinz JörgFuhrmann. “As our SALCOS project has demonstrated, we are technologically in aposition to achieve significant reductions in CO2 with the aid of hydrogen. TheSalzgitter Wind Hydrogen project is an important building block on the waytowards climate-friendly steel production. It is now the turn of politicians toput in place the right conditions to support the transformation into a low-CO2industry.”

The cost of the project as a whole – including the construction of the wind turbines and the hydrogen plant and connecting these to the existing supply networks – amounts to around €50 million.

Hydrogen has long played a role in steelmaking, in enhancing the quality of annealing processes. The gas is currently supplied by Linde AG, and this company will in future continue to safeguard Salzgitter’s own production.

A containerized plant will be erected in Salzgitter which at full capacity will produce 400 Nm3 of hydrogen. PEM technology is ideally suited to exploiting the volatile generation of wind and solar power. The highly dynamic mode of operation allows the plants to respond to demands resulting from the rapidly fluctuating power supply.

“Reducing CO2 across all industries is a central challenge if we are to meet medium- and long-term climate targets,” said Gabriele Schmiedel, Executive Vice President, Hydrogen Solutions at Siemens Gas and Power. “Renewable energy generation and innovative technologies such as the production of green hydrogen through electrolysis are essential components. We are delighted to join with Salzgitter Flachstahl GmbH to advance the application of green hydrogen in the steel industry.”

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