Hydrogen purification along the value chain – challenges & solutions
With the rise of the hydrogen economy, demands on gas quality are also increasing. Whether as an emission-free fuel in fuel cell vehicles, as a process gas in the chemical or pharmaceutical industry, or as an energy source in sensitive applications, purity is crucial for the efficiency, safety, and longevity of systems.
Even the slightest impurities such as carbon monoxide, sulfur compounds, or moisture can disrupt electrochemical processes, damage catalysts, and cause expensive downtime. That is why hydrogen purification is a central component of the value chain. Only high-purity hydrogen can be used reliably and safely in critical applications.
The greatest risk of contamination arises not only during production, but above all during transport: in mobile containers, in buffer storage tanks at filling stations, or during transfer to fuel cell vehicles. Back diffusion, pressure fluctuations, material abrasion, or condensate formation can reduce quality here—a critical factor for mobility, semiconductor manufacturing, or chemical processes, for example.
Pure production is therefore not enough. End-to-end technical solutions are needed to protect hydrogen purity across all process phases. With closed high-pressure systems, corrosion-free Type 4 cylinders, integrated sensor technology, and modular architecture, Hexagon Purus minimizes contamination risks and ensures the highest quality standards.
Purity as a challenge along the entire hydrogen chain
Hydrogen production is subject to strict quality requirements. However, the real challenge lies in maintaining this purity throughout transport, storage, and mobile applications.
Potential contaminants arise from residues in pipes, corrosion of metallic components, pressure losses, or back diffusion of ambient gases—even with high-quality feed gas. In sensitive areas such as semiconductor manufacturing, public transportation, or pharmaceutical processes, even a minimal deviation from the required degree of purity can impair function or cause high costs.
Processes such as pressure swing adsorption (PSA), membrane separation, catalytic purification, or cryogenic distillation are used to produce high-purity hydrogen. These achieve purities of up to 99.9999%, but require specialized equipment, a continuous energy supply, and have physical limitations: PSA systems require a lot of space, membranes are sensitive to certain gases, and cryogenic processes are energy-intensive.
Regardless of the method, the central task remains the same: purity must be ensured all the way to the end user. Hexagon Purus does not replace purification systems, but protects their results – with pressure-stable, closed systems and non-corrosive, high-pressure Type 4 cylinders. This prevents contamination from material abrasion or chemical reactions.
The modular storage and distribution solutions can be adapted precisely to application profiles and space requirements—without compromising gas integrity. Integrated sensors monitor pressure, temperature, and tightness in real time, enabling continuous control of hydrogen quality.
How Hexagon Purus protects hydrogen purity at every stage
The quality of hydrogen dictates the performance and safety of numerous applications – ranging from fuel cells in commercial vehicles to highly sensitive industrial processes. Hexagon Purus addresses this challenge with an integrated approach engineered for uncompromising purity, maximum system integrity, and end-to-end control. As a technology leader in high-pressure storage and hydrogen logistics, Hexagon Purus develops solutions that prevent contamination, minimize back diffusion, and reliably maintain the integrity of hydrogen – whether it is stored, transported, or used on-site. Our focus is on closed, corrosion-free system architectures complemented by intelligent sensor technology and robust material selection. Hexagon Purus thus makes a decisive contribution to ensuring that hydrogen not only remains emission-free but is also usable in its highest purity – wherever quality is paramount.
All advantages of hydrogen solutions by Hexagon Purus
- Type 4 technology: Non-corrosive, high-strength, and ultra-lightweight composite materials ensure maximum safety, a long service life, and high cycle stability.
- Modularity & flexibility: Systems can be individually adapted in terms of pressure levels (up to 950 bar), storage volume, installation location (inside/outside), and integration depth.
- High payload & efficiency: The low system weight increases transport efficiency and enables longer ranges or additional payload.
- Purity & safety: Closed, pressure-stable system architecture with integrated sensors for pressure, temperature, and leakage ensures hydrogen purity in every phase.
- Flexible applicability: Compatible with fuel cells, compressors, mobile filling stations, and stationary applications – for industry, transportation, and energy.
- Future-proof: Designed to meet current and upcoming ISO standards (e.g., ISO 14687) as well as stringent requirements for H₂ purity and operational stability.
- Low maintenance & durable: Robust design reduces service requirements and operating costs – ideal for 24/7 operation.
- Easy system integration: Standardized interfaces enable seamless integration into existing processes and vehicle architectures.
- Certified quality: Manufactured to the highest industry standards (ISO 9001, IATF 16949) and tested for flow, burst resistance, leakage, and material fatigue.
- Field-proven: Globally proven solutions for buses, trucks, trains, industrial plants, and mobile supply units – reliable and scalable.
High-pressure storage with non-corrosive Type 4 cylinders
Hexagon Purus hydrogen high-pressure Type 4 cylinders form the foundation for safe, lightweight, and clean hydrogen storage. Their construction – a corrosion-free plastic inner liner encased in high-strength carbon fiber – prevents any reaction of the gas with metallic surfaces. This characteristic reliably safeguards hydrogen from contamination by particles, moisture, or chemical residues, which can occur in metallic systems. The cylinders are pressure-stable, durable, and ideally suited for purity-critical applications in mobility and industry. Their use ensures consistently high hydrogen quality over numerous cycles – a key factor for fuel cells in sensitive mobility applications or the chemical industry, for example.
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How stationary storage solutions ensure the highest hydrogen quality
The stationary storage solutions by Hexagon Purus integrate modular hydrogen high-pressure Type 4 cylinders with a closed system architecture specifically designed for maintaining high hydrogen purity. Thanks to their corrosion-free materials and hermetic sealing, the gas quality is reliably protected even during extended storage periods. Particularly in industrial processes requiring high-purity hydrogen – for example, in ammonia synthesis or semiconductor production – these storage systems ensure consistent purity and prevent contamination through back diffusion, moisture, or particles. Their low permeability and the option for sensor-based monitoring make them an ideal solution for sensitive applications within the hydrogen economy.
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Getting hydrogen safely to its destination – with Hexagon Purus distribution systems
The distribution systems by Hexagon Purus ensure that hydrogen is not only transported efficiently but also maintained at a consistently high quality. The hydrogen high-pressure Type 4 cylinders within the transport modules are corrosion-free, vibration-resistant, and impervious to environmental factors – ideal conditions for preserving gas purity during transit. Thanks to integrated sensors that monitor pressure, temperature, and leaks, the hydrogen quality can be controlled in real time. Critical issues such as backflow or mixing with foreign substances are also prevented by the closed system design and standardized connection components.
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Protection against leakage, backflow and cross-contamination during refueling
The mobile and stationary refueling systems by Hexagon Purus not only facilitate a rapid and safe hydrogen supply but also significantly contribute to maintaining gas purity. Integrated pre-cooling, closed line systems, and high-precision pressure control minimize the risk of backflow, condensate formation, or particle ingress. Refueling occurs under controlled conditions, which is particularly crucial for fuel cell vehicles, as even minor impurities can lead to performance degradation or system failure. These systems also support the real-time monitoring of all safety and quality-relevant parameters. Consequently, the refueling systems by Hexagon Purus ensure that hydrogen purity is preserved throughout the entire supply chain – from storage and transport to the final application.
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Find out about the innovative uses and benefits of hydrogen and become part of the energy transition – contact us to learn more about customized hydrogen solutions for your needs and experience the future of energy to transform your industry sustainably.
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