A small cell with a big effect
Purification and separation of hydrogen from any feed gases – no technology platform can do this component of hydrogen value creation as efficiently as our patented EHS (Electrochemical Hydrogen Separation).
Many possibilities for EHS
LOW H2 CONTENT
Separation
In addition to the actual product gas, many natural gas deposits also contain hydrogen, but this is simply burned because it is not wanted in the product gas. The SIQENS EHS separates the hydrogen and thus enables two things: a high-purity product gas and value creation from high-purity hydrogen.
HIGH H2 CONTENT
Cleaning
Hydrogen gas streams are often contaminated by production or transport. The SIQENS EHS reliably removes these impurities from the gas without a complex process.
H2 production from methane
Splitting
Hydrogen occurs on Earth almost exclusively in bound form. Although the splitting can take place using a reformer and water-gas shift reactor, separating the gas mix of H2, CO, CO2 and other by-products that is then present has so far been an energy-intensive task. However, with SIQENS EHS, the process becomes an energy-efficient method of hydrogen production.
The technology
Flexible, versatile and energy efficient
The EHS cell
The feed gas with the hydrogen it contains is fed to the electrochemical membrane via flow plates. The voltage applied there allows the hydrogen to pass through, but not the additional gases.
No high-performance compressors are required for operation because the EHS also works at atmospheric pressure. This efficiency of the process control is significant.
SCALABLE
Configuration as a stack and rig
The individual cells are assembled as a stack sized to produce 40 kg of H2 per day. These stacks can be flexibly scaled and connected next to each other. Production of 1000 kg/day is no problem.
HIGH RESISTANCE AGAINST IMPURITIES
Flexible feed gases
The SIQENS EHS is not only very resistant to a wide range of impurities, but thanks to the electrochemical process it also delivers a more consistent product gas quality with a long shelf life.
RESEARCH, USE CASES AND NEWS
Current news, project and partners
USE CASES
EHS projects
Find out more about the ongoing EHS projects and be inspired by the diverse use cases. The EHS makes business models that previously seemed uneconomical possible.
NEWS
News from the EHS
See for yourself the influence of the EHS on the hydrogen economy. Find out more about the latest projects and partners.Start with EHS
Information material
We would be happy to send you current information about EHS and corresponding white papers on the topic.
EHS FOR YOUR APPLICATION
We look forward to your project!
There are many environments and applications in which EHS provides hydrogen cost-effectively. Show us your project and together we will find the perfect solution.
Siqens GmbH
Landsberger Straße 318 D
D 80687 Munich
Co-funded by the Horizon 2020 programme of the European Union
Solar Impulse Efficient Solutions
© Siqens GmbH 2025
Co-funded by the Horizon 2020 programme of the European Union
Solar Impulse Efficient Solutions
© Siqens GmbH 2025
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