Innovative filtration solutions for green hydrogen | Your filtration options along the process chain

Green hydrogen is a key component of the energy transition and plays a crucial role in the future hydrogen economy. Reliable filters along the entire process chain are essential for efficient and safe hydrogen production. Starting with the treatment of water as a resource for the electrolyser, through the actual electrolysis, to the use of the hydrogen produced in fuel cells. BOLL & KIRCH develops tailor-made filtration systems for all applications along the green hydrogen value chain – including its derivatives such as ammonia, methanol, synthetic fuels (e-fuels) and other power-to-X products.

We develop customized filter systems for all applications along the green hydrogen value chain.

Green hydrogen is the key to climate neutrality

Green hydrogen is produced by electrolysis using electricity from renewable sources and is climate neutral. It offers the possibility for industries to become CO2-free. Contact us for more information.

Filtration in electrolysis: Protection for maximum efficiency

Electrolysis is at the heart of hydrogen production. To protect sensitive electrolysers – whether alkaline electrolysis (AEL), PEM electrolysis (proton exchange membrane), solid oxide electrolysis cell (SOEC), or anion exchange membrane electrolysis – from contamination, we use our BOLLFILTER Simplex and aquaBoll® automatic filters.

Our filtration systems ensure continuous operation through:

High-precision filtration and treatment of all types of water resources (salt water, brackish water, feed water, surface water)
Long service life and low pressure losses
Minimal maintenance costs thanks to automatic backwashing
Selection of iron-free materials
Compact design for flexible integration
Filtration of the electrolyte (alkaline solution)
Fewer disruptions and higher yield during the electrolysis process

Tap Water

Tap water contains impurities that can affect electrolysis efficiency. BOLL FILTRATION offers dependable filtration solutions to ensure consistent water quality—supporting stable performance and protecting sensitive equipment.

Sewage Water

In green hydrogen production, sewage water offers a sustainable feedstock for electrolysis. BOLL FILTRATION systems ensure high-performance filtration by removing suspended solids, organic matter, and fine particulates. This protects sensitive electrolyzers, enhances system efficiency, and supports long-term operational reliability in water-to-hydrogen conversion processes.

Salty / Brackish Water

Salty and brackish water pose challenges for electrolysis due to high salinity and suspended solids. BOLL FILTRATION systems provide robust pre-treatment, removing particulates and protecting downstream components—ensuring stable, efficient hydrogen generation from alternative water sources.

Surface Water

Surface water often contains organic matter, sediments, and microorganisms that can impair electrolysis. BOLL FILTRATION provides high-efficiency filtration systems that ensure clean, consistent water quality—protecting electrolyzers and enabling reliable hydrogen production from natural water sources.

Cooling Water

Cooling plays a key role in hydrogen-based systems. Clean cooling and process water is crucial in fuel cell systems, including methanol fuel cells and methane fuel cells. Our filter solutions prevent corrosion, deposits, and failures.

High-precision filtration for maximum cell performance
Compact design for flexible integration
Low-maintenance systems for industrial applications

Power-to-gas and green ammonia: securing future technologies

In power-to-gas processes, surplus electricity is converted into green hydrogen, which can then be used to produce green ammonia. Our filter systems ensure the quality of the media used and protect compressors, storage tanks, and pipes.

Adaptable to individual plant requirements
Sustainable and energy-efficient solutions
75 years of experience
Full supplier: solutions for resources, processes, and products

Sustainability meets innovation. Our filtration solutions are not only sophisticated, but also designed for sustainability and resource conservation. By using durable materials such as filter housings, filter elements, and ceramic membrane elements, energy-efficient technologies, and low-maintenance systems, we are actively contributing to the decarbonization of industry.

We are your partner for customized filtration solutions in hydrogen and ammonia technology.
Contact us for individual advice or request your suitable filter system directly.

FAQs

Why is filtration so important in hydrogen production?

Filtration protects critical components such as electrolysers, compressors, and fuel cells from particles, deposits, and contaminants. This increases efficiency, extends service life, and reduces maintenance costs.

What filter solutions does BOLL & KIRCH offer for electrolysers?

We offer specially developed simplex, duplex, and automatic filters for the filtration of feed water and cooling water in AEC, AEM, PEM, and SOEC electrolysers. Our systems are compact and low-maintenance and can be planned specifically for each project.

Can BOLLFILTER also be used in power-to-gas plants?

Yes, our filter systems are ideal for power-to-gas processes in which electricity from renewable sources is converted into hydrogen. They ensure clean process media and protect all downstream components.

What are the advantages of automatic backwashing systems?

Our aquaBoll® automatic filters clean themselves through backwashing. This reduces downtime, lowers operating costs, and enables continuous operation without manual intervention.

Are the filter systems certified for use in the hydrogen economy?

Yes, our products comply with international standards such as ASME, API 614, API 692, and are certified for use in safety-critical applications.

Are the filter systems certified for use in the hydrogen economy?

Yes, our products comply with international standards such as ASME, API 614, API 692, ATEX PED, and meet safety standards for pressure equipment (DOSH, ARH, CRN, NR-13). They are certified for use in safety-critical applications.

What role does filtration play in fuel cell systems?

In fuel cells, clean cooling water is crucial for performance and service life. Our filters prevent deposits and corrosion in heat exchangers and cooling circuits.

Can the filter systems be customized?

Yes, we develop tailor-made solutions for your specific requirements—from connection size to filter fineness.

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Max Wagener Teamleader Sales BU Water

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