Electrolysis process explained
A hydrogen electrolyzer is a device that uses electricity to split water (H20) into its constituent elements, hydrogen (H2) and oxygen (O2). This process is called electrolysis and is achieved by passing an electric current through water, which causes the water molecules to break apart into hydrogen and oxygen ions.
The electrolysis process requires ultra-pure water to ensure the efficiency and longevity of the electrolyzers. High-pressure pumps are often used to feed ultra-pure water into the electrolysis cell. These pumps are designed to generate the high pressures needed and maintain a steady flow of water.
Water treatment
According to the UN, water scarcity is one of the major challenges facing the world today and tomorrow. The world has lots of saltwater, but not nearly as much fresh water. Turning seawater into DI water, which can be used for hydrogen production is a promising and sustainable approach that can help to protect the scarce freshwater resources.
Using high-pressure pumps and energy recovery devices from Danfoss in the seawater reverse osmosis process is not only a sustainable approach but also the most energy efficient way to produce the DI water needed.
Green hydrogen will play a critical role in the transition away from fossil fuels. Download our informative whitepaper to learn how to prioritize electrification and energy efficiency measures, produce hydrogen efficiently, and utilize it wisely to drive sustainable transformation in hard-to-decarbonize sectors. Take the first step towards a greener future by downloading the whitepaper now.
Go to paper
Compact, oil-free pumps with high efficiency
The Danfoss PAHT high-pressure pump is an ideal choice for the electrolyzer application due to its many benefits.
High-pressure PAHT pumps for ultra-pure water are made of stainless steel and have high compatibility with the water and the electrolysis process making them highly reliable.
The pumps offer high efficiency rates up to 95% volumetric efficiency. There is no risk of oil contamination as the pumps are oil-free and lubricated by the media itself. The pumps have very long service intervals, only a few moving parts and are easy to maintain.
Videos: Pump animation and hydrogen electrolysis plant
Learn how the high-pressure pump from Danfoss works
Danfoss offers a broad range of solutions for hydrogen. High-pressure pumps and energy recovery devices are some of them.
Related products
The range of high-pressure APP pumps is optimized for both landbased, off-shore and marine sea water reverse osmosis applications. Available with or without motor.
High-pressure pumps for ultra-pure water applications i.e. with de-ionized, de-mineralized or distilled water. Appropriate for critical applications such as high-pressure cleaning and humidification. Available with or without motor.
With a 3-in-1 design that integrates highly effective isobaric pressure exchangers with positive displacement booster pumps and electrical motors, active iSave® ERDs deliver big energy savings in small spaces. Covering train sizes from 200-3,000 m3/day
