By Christophe Valdenaire (October 2024)
Hydrogen electrolysis is one of the front-running solutions for green hydrogen production, and a fundamental part of the hydrogen revolution. The basic premise of electrolysis involves using a proton exchange membrane (PEM) or alkaline solution to split water into its constituent gases. However, this is merely one aspect of the complex engineering underlying hydrogen electrolyzers. They utilize electrodes, bipolar plates, gas diffusion layers (GDLs), and more. Given that design complexity, having the right sealing technology is essential to protect the overall electrolyzer process.
What sealing solutions are used in hydrogen electrolysis? Specialized electrolyzer gaskets from proven sealing and manufacturing companies like Omniseal Solutions are critical for numerous reasons. Precision sealing solutions provide the following technology advantages:
Safety & containment
Pressure management
Efficiency & performance
Durability & longevity
Electrical insulation
Join our hydrogen experts as we dig into these essential aspects in more depth.
Electrolyzers can operate under pressure up to 40 bar in most cases. Maintaining such pressure is essential for the efficiency and safety of hydrogen production. Effective seals are necessary to prevent hydrogen and oxygen gas from escaping, which could lead to operational inefficiencies and safety hazards. The ability to maintain pressures without leakage is a key performance parameter for the polymer electrolyzer gaskets that Omniseal Solutions custom engineers for their customers.
Good sealing significantly enhances the overall efficiency and performance of electrolyzers. By minimizing leaks and maintaining optimal operating conditions within the cells, sealing ensures the electrolyzer operates at peak efficiency. This includes maintaining the correct concentration of electrolytes and preventing the loss of hydrogen and oxygen gas. The performance of the electrolyzer is directly linked to the quality and design of the seals used. Omniseal Solutions has successfully developed fluoropolymer sealing materials, in-house testing and process expertise to deliver high performance and cost effective solutions.
The harsh conditions of electrolysis, including exposure to corrosive chemicals, high pressures, temperature cycles, and electrical loads, demand high-performance seals. These seals must withstand extreme conditions over prolonged periods to ensure the long-term reliability and durability of the electrolyzer systems.
In some electrolyzer designs, seals are required to provide electrical insulation between components of the electrolyzer stack. This is particularly important to prevent short circuits and ensure the efficient functioning of the electrolysis process. The insulating properties of the seals help maintain the integrity of the electrical systems within the electrolyzer.
Effective sealing is essential for maintaining the purity of the produced hydrogen. Contaminants can enter the system through leaks, compromising the quality of the hydrogen and potentially damaging the electrolyzer. Additionally, effective seals prevent the mixing of gasses, which is critical for ensuring the output is pure hydrogen.
Proper sealing can significantly reduce maintenance needs and extend the lifespan of electrolyzer components. This improvement in reliability and reduction in maintenance translates to better cost-effectiveness for hydrogen production. By preventing leaks and maintaining efficient operation, high-quality seals help lower operational costs and improve the economic viability of hydrogen electrolysis.
To meet the challenges posed by hydrogen electrolysis, specialized sealing solutions are being developed using advanced materials and designs. Omniseal Solutions’ gaskets are designed to handle low hydrogen permeability, high chemical resistance, and stable creep resistance over time. To meet future needs, we are also working on integrated solutions, such as gaskets bonded directly to electrolyzer stack plates, to improve reliability and ease of assembly.
As the demand for green hydrogen production grows, continued innovation in sealing technology will play a critical role in improving the efficiency, safety, and scalability of electrolysis systems. High-performance seals are indispensable to protect and sustain hydrogen production: ensuring safety through the containment of corrosive elements; managing pressure and temperature conditions; preventing contamination; and reducing maintenance for cost-effective operations. As the technology and industry matures, Omniseal Solutions remains a key partner to develop more adapted solutions.
Want to discover more in-depth insights into why advanced sealing materials are important in the hydrogen value chain? Explore our blog today on electrolyzer gaskets and other hydrogen applications (refueling stations, CCS, turbines and more)!
Contact our hydrogen expert to go beyond in the performance and reliability of your hydrogen electrolysis or other systems.
In electrolyzers (PEM and Alkaline systems), seals ensure containment of hydrogen and oxygen gases, maintain operating pressure, prevent contamination and chemical breakdown, provide electrical insulation, and extend system durability. Without effective sealing, an electrolyzer’s safety, efficiency, and hydrogen purity are compromised.
Most electrolyzers operate up to 40 bar. Seals or gaskets prevent gas leakage at these pressures, ensuring safe and efficient hydrogen production.
High-performance seals and specialized gasket materials minimize leaks, preserve optimal electrical insulation, resist chemical degradation, and maintain operating conditions. This allows electrolyzers to achieve peak energy efficiency and lower energy losses.
Seals must resist corrosive chemicals, high oxygen pressure, temperature fluctuations, electrical loads, and long-term mechanical stress, making durability a critical design requirement.
Omniseal Solutions develops engineered spring-energized seals and advanced fluoropolymer gaskets for PEM and Alkaline electrolyzers. These solutions deliver low hydrogen permeability, high chemical resistance, electrical insulation, creep resistance, with optional bonded designs for stack integration. These improve dimensional reliability, safety, and cost-effectiveness.
