News – 09/25/2023

Filtration solutions for the fuel cell: Hydrogen Technology Expo in Bremen

Hengst presents a modular system of various filtration solutions for commercial vehicle and off-highway applications

To support the use of hydrogen as a climate-friendly energy carrier, Hengst has developed a modular set of various filtration solutions for fuel cells. At Hydrogen Technology Expo in Bremen (September 2023, 27-28), the specialist in filtration and fluid management will present products for coolant and air filtration, and in the area of system integration, a water separator for anode recirculation.

Innovations from Hengst at Hydrogen Technology Expo in Bremen

"To protect our planet, CO₂-neutral drives are essential. That's why we at Hengst have been developing filtration solutions for hydrogen-powered vehicles and generators. The product of our innovation and long years of international experience: high-performance ion exchangers, cathode air filters and water separators for fuel cells." resumes product manager Mathias Diekjakobs. At Hydrogen Technology Expo, together with other experts from Hengst, he will be presenting the modular solutions, as well as the possibilities for customization.

Blue.iox ion exchanger quickly reduces the initial ion concentration in the coolant circuit

During fuel cell operation, ions are introduced into the coolant. These result from the aging of the coolant itself or from components in the coolant circuit. Effective filtration is therefore required to ensure safe operation of the fuel cell. The innovative Blue.iox ion exchanger from Hengst offers an exceptionally high level of protection with minimum maintenance. The unique design of the filter cartridge with axial filter flow and the special mixed bed resin system for cation and anion exchange ensure high filtration efficiency over the entire service interval. The ion concentration in the coolant circuit is thus reduced very rapidly.

Hengst offers various sizes in its modular program, to meet the requirements of smaller systems as well as fuel cell systems for heavy-duty machinery and stationary and maritime applications. Besides offering standard solutions, the core competency of Hengst is system integration, which is put to use here in the development of customized ion exchanger concepts. The Blue.iox from Hengst is also designed for easy maintenance: A screw cap allows the filter cartridge to be replaced cleanly without special tools, while integrated shut-off valves prevent coolant from escaping.

Cathode air filter system to protect the drive even under harsh operating conditions

The airflow of a fuel cell also requires special filtration. To ensure long service life and high performance, the intake air must be very thoroughly cleaned of airborne particles. In addition, pollutants such as nitrogen oxides (NOx), ammonia (NH3) and sulphur dioxide (SO2) can cause unwanted deposits in the fuel cell and damage it.

Cathode air filter systems from Hengst fundamentally have a multi-layered construction. Each layer is optimized for a specific task, so that the interaction of all filter stages in the overall system provides reliable protection against harmful particles and gases in the intake air. A high level of modularity makes it possible to fulfill all requirements for different applications worldwide using standardized technological modules. This minimizes development and application times, increases robustness and durability through the use of time-proven, coordinated components, and ensures highly cost-effective use of the components throughout the service life. The applications for Hengst cathode air filters include small fuel cells, mobile systems in the on- and off-highway segment, as well as large-scale systems for stationary power generation, and ships

Proper water management is key to preventing deposits of liquid water

To prevent liquid water deposits and thus ensure the continuous effective operation of the fuel cell, proper water management is crucial. The solution from Hengst: a new type of separator module for anode gas recirculation. It combines the function of droplet water separation and gas drainage with an innovative valve configuration of the purge and drain valve. Highly integrative solutions are one of the strong points of Hengst.

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Nienkamp 55-85
48147 Münster
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