Porous Transport Layers | KnitMesh
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Porous Transport Layers

Porous Transport Layers

KnitMesh Technologies’ Porous Transport Layers are specialised products made of knitted wire mesh. These layers are commonly utilised in electrolysis processes, particularly for hydrogen production and chlor-alkali applications.

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Discover KnitMesh Technologies’ Porous Transport Layers

KnitMesh Technologies’ Porous Transport Layers have established themselves as an integral component within electrochemical applications such as proton exchange membranes (PEM), ion exchange membranes (IEM), and alkaline zero-gap electrolyser systems. This innovative product has not only redefined the standards for porous transport layers but also has paved the way for enhanced efficiency and durability in these demanding environments.

Constructed from knitted wire mesh that is then compressed, KnitMesh Technologies’ Porous Transport Layers allow for the seamless flow of liquids, gases, and particles while providing essential structural support. Not only do they offer flexibility and robustness, but they also exhibit remarkable resilience, effectively eliminating compressibility losses through load-cycling.

One of the key advantages offered by KnitMesh Technologies’ Porous Transport Layers is their ability to alleviate electrical contact resistance by optimising electrical and pressure contact between various components such as cells, divider stacker plates, membranes, and diaphragms in electrolysis cell stacks and modular cell cartridges. This leads to improved overall performance and reliability within electrochemical systems.

Moreover, these porous transport layers boast exceptional corrosion resistance, making them capable of withstanding rigorous operating conditions including elevated temperatures, pressures, and exposure to caustic electrolyte solutions such as potassium hydroxide.

To further accentuate their versatility, KnitMesh Technologies’ Porous Transport Layers are available in a wide array of shapes, with porosity levels ranging anywhere from 50% to 99%, thus catering to the diverse requirements of different applications.

Hydrogen Production


Porous Transport Layers are used in the hydrogen production industry to facilitate efficient and controlled gas diffusion. These layers help ensure a uniform flow of gases, improving the overall performance of hydrogen production processes.



The chlor-alkali industry utilises Porous Transport Layers to aid in the production of chlorine, caustic soda, and hydrogen. These layers are essential for separating the different components and allowing for selective transport of ions, contributing to the efficiency of the process.

Water Treatment


In water treatment applications, Porous Transport Layers are employed for their ability to effectively separate contaminants and facilitate the transfer of chemicals or pollutants. These layers play a crucial role in enhancing the purification and filtration processes in the water treatment industry.

Fuel Cells


Porous Transport Layers are widely used in fuel cells to help regulate the flow of reactants and products within the cell. These layers enable efficient diffusion of gases, ensuring optimal performance and longevity of fuel cell systems.

Understanding Electrolysis

Electrolysis is the process of breaking down a substance into its individual components using an electric current. This process is widely used in industry as well as in scientific research. In simple terms, electrolysis involves the use of an electrolytic cell that consists of two electrodes, an anode and a cathode, and an electrolyte solution that conducts electricity.

When an electric potential is applied across the anode and cathode, the ions in the electrolyte solution move towards their respective electrodes due to the attraction of opposite charges. At the anode, positive ions lose their electrons and become oxidised, while at the cathode, negative ions gain electrons and become reduced. This results in the formation of new substances, which can be isolated through various processes.

One important application of electrolysis is in the production of hydrogen gas, which is used in various industries as well as for energy production. In this process, water is used as the electrolyte solution, and the electric current is used to split the water molecule into its constituent hydrogen and oxygen atoms.

However, a major challenge with electrolysis is the production of unwanted by-products and the loss of efficiency due to the resistance of the electrolyte solution. To address these issues, Porous Transport Layers are used in the electrolytic cell to enhance the transfer of reactants and reaction products, as well as to reduce the formation of unwanted by-products that can cause problems in the system.

Features and Benefits

  • Enhanced electrolyser efficiency: Improves the overall efficiency of electrolysis processes.
  • Seamless flow: Allows for smooth passage of liquids, gases, and particles.
  • Structural support: Provides essential support within electrolysis cell stacks and modular cell cartridges.
  • Reduced electrical contact resistance: Eliminates electrical contact resistance, contributing to better performance.
  • Exceptional corrosion resistance: Offers high resistance to corrosion, ensuring longevity.
  • Wide array of shapes: Available in various shapes to suit different applications.
  • Custom porosity levels: Ranges from 50% to 99% porosity levels for customised needs.
  • Zero wire breakages: Eliminates the risk of membrane puncture, ensuring durability and safety.
  • Bespoke design: Can be tailored to specific requirements, providing personalised solutions.
  • Quality assurance: ISO 9001 accreditation ensures consistent quality and performance standards.

Suitable Materials for Porous Transport Layers