Hydrogen – a clean and sustainable energy source
Green hydrogen is a promising and rapidly developing field of renewable energy. As the world seeks to transition away from fossil energy sources to reduce carbon emissions and mitigate climate change, hydrogen produced through the electrolysis of water using renewable energy sources has emerged as a key contender.
Danfoss supports the green transitions with high-pressure pumps and energy recovery devices. Overall, high-pressure pumps for ultra-pure water are a critical component of green hydrogen generation, enabling the efficient and reliable production of this promising renewable energy source.
The water needed for hydrogen production must be ultra-pure. To protect the scarce drinking water resources seawater reverse osmosis could be a better way to ensure water supply.
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.
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.
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.
Learn how the high-pressure pump from Danfoss works