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Percent of global CO2
emissions coming from the mobility sector in 2021


MT Hydrogen
required p.a. in 2050 for net-zero


are passionate to support the energy transition


Minimizing our carbon footprint has become one of the major tasks today and hydrogen is in the center of decarbonization initiatives. It can be easily stored to serve as fuel for mobility or as energy carrier for the industry.

19% of the global CO2 emissions are caused by the mobility sector alone. The demand for Hydrogen in this sector will therefore reach 18MT by 2030 and the required infrastructure needs to be built up – now!


Decarbonization projects, at the pace and scale required, are not a simple matter. In orchestrating all elements of a hydrogen generation project – from planning, implementation to operation – the involvement of the right partners is key and a matter of trust.

Turnkey solutions and support during the entire lifecycle, NEUMAN & ESSER delivers the full package: Greenfield studies, compressor and electrolyzer systems, engineering and construction, digital plant integration and 360° service during operation.

Customers benefit from an OEM with a strong hydrogen expertise.


New challenges arise and investors are often left alone when their initiatives to reduce their carbon footprint are supposed to take up momentum.

NEUMAN & ESSER helps to tackle and overcome these challenges providing all relevant services during the planning phase answering permitting, siting, and risk assessment questions of these new types of projects.

Expert consultants evaluate potential locations and support on judging the feasibility. Additionally, they deliver the design of the hydrogen production solutions from the selection of the right and site-specific system technology to the dimensioning of the components. Services also include the full governance of public approval processes.

This is the first step in making NEUMAN & ESSER the general contractor for turnkey hydrogen production solutions.


NEUMAN & ESSER has ample experience in tailormade plant engineering solutions. This strength is transferred into the renewable H2 value chain by optimizing the interfaces of the individual components. As a one-stop shop NEUMAN & ESSER uses its deep insights of the sweet spots of the components like electrolyzers, gas treatment as per use case requirement, compressors, storage concepts and fuel cells to achieve the global optimum.

NEUMAN & ESSER realizes the full scope from engineering over construction to installation, commissioning up to the hand-over to the NEUMAN & ESSER aftermarket with individual and digitally supported full-service solutions.


In the water electrolysis process an electrical energy is used to split water molecules (H2O) into their constituent parts (2 H2 and 1 O2).

Currently two main electrolyzer technologies are employed on a broad industrial scope – alkaline (AEL), which uses a liquid electrolyte (potassium or sodium hydroxide) as a feedstock, or spolymer electrolyte membrane (PEM) electrolyzers​ working on purified water.

The core of each electrolyzer unit is formed by the stack(s). These stacks must be supplied with electricity and lye (AEL) or purified water (PEM). As electrolyzers work on direct current (DC) at a specific voltage, transformers and rectifiers must be employed to ensure the correct operating current and voltage. Additionally, lye-management units are needed for AEL type electrolyzers whereas high quality water polishing is needed for PEM. With a stack efficiency at around 75% thermal management systems to ensure the right process and outlet temperatures are also of high importance.


Finally, ensuring and maintaining the desired gas quality is of paramount importance. For this a gas purification (DeOxo & Dehumidification) and quality measuring system is employed. 

Within the framework of the EU’s Carbon Neutrality Targets, on-site production of hydrogen via electrolysis from renewable energy sources is an attractive solution. The use of hydrogen as a clean energy carrier, enables storage of large quantities of energy for longer periods of time, and can play an important role in stabilizing the grid when the contribution of highly volatile energy sources like wind and photovoltaics increases.

If this electricity is produced from renewable energy, the resulting hydrogen is “green” and “zero-emission” from well to wheel.

Entering the market with the NEA|HYTRON PEM, NEUMAN & ESSER broadens its product portfolio with an electrolyzer. The decision was taken to use PEM technology as it does not involve harmful chemicals and thus represents a clear statement towards making green hydrogen even cleaner. Combining it with further OEM components – specifically compressor systems – the efficiency of the overall hydrogen production solution can be brought to the maximum.


Electrolyzer output, storage capacities and expected hydrogen amounts dispensed need to be balanced carefully with the right compressor equipment to allow for smooth and reliable overall system operation. It is of great value that, from the initial planning of a hydrogen refueling station (HRS), NEUMAN & ESSER takes this into account when involving its OEM components – with an experience of more than a hundred compressor systems supplied to HRSs globally.

This optimization is supported by the NEA|HRS PILOT simulation software (picture right) which reflects H2 production, compressor data and the full fluid- and thermodynamical behavior of the HRS. Hydrogen coming from a NEA|HYTRON PEM electrolyzer needs to be stored under high pressure in storage vessels, e.g., trailers or onsite storage tanks.

NEA|HOFER MKZ diaphragm compressors are the means of choice for small to medium amounts to be processed and are optimized for continuous operation to permanently control pressure levels in storage tanks.

NEA|HOFER TKH hydraulic driven dry running reciprocating compressors come into play to transfer H2 from the storage through the dispenser into fuel cell tanks. They are the preferred option for intermittent operation like refueling processes at an HRS and can handle pressure levels of 350 and 700 bar.

For future high flow demands of more than 10 tons of hydrogen per day, high pressure reciprocating compressors with more than 500 bar discharge pressure operating oil-free are of growing importance.


In various applications, NEUMAN & ESSER’s cloud-based monitoring solution NEA|XPLORE has already proven its capabilities in protecting customers from costly downtimes and giving a high level of confidence during operation.

NEA|XPLORE supports the service in assessing operational risks and judging on right measures. Exception-based surveillance is the underlying principle: Connected components are permanently feeding their data into the platform. Suspicious developments are flagged automatically for a closer inspection.

The benefit from remotely supervising the full value chain from electrolyzer to dispenser lies at hand: Detecting unusual behavior of involved components helps avoiding emergency stops. It allows to analyze and diagnose HRS performance and draw conclusions on the asset health before damage occurs. This makes service visits more efficient and gives relief to customer organizations. With measurable impact on operating cost.

And once hydrogen production availability onsite is combined with knowledge about HRS usage patterns, the foundation for operating the full plant smartly is laid – which offers even more cost saving potential.


Uniting OEM service quality with digital monitoring to a 360° service solution results in the best possible customer proximity and enduring equipment quality.

From receiving information in case of maintenance requirements to full service including parts supply management: By deciding for a specific Condition Management service level plant operators have a choice to make NEUMAN & ESSER a fully integrated service provider and to get operating cost under control.

Fast-Lane assistance: Supported by NEA|XPLORE, NEUMAN & ESSER engineers can make quick decisions remotely in potential failure situations. Ideally, they convert potential unplanned downtime into planned maintenance.

Actions initiated by dedicated service teams prior to operational exceptions becoming critical, give customers a high degree of confidence and the freedom to focus on what really matters for their business.

Patrick McCalley

Patrick McCalley

Sales Manager

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