What are Green Hydrogen Electrolysers?

About Green Hydrogen Electrolysers:

• Hydrogen electrolysers are devices that use electricity to split water into hydrogen and oxygen.
• When electricity input to the electrolyser is obtained from renewable sources like wind and solar, then the hydrogen produced is called green hydrogen.
• Typically, electrolysers consume 50-55 kilowatt-hours or units of electricity to produce one kilogram of hydrogen.
• Electrolysers produce hydrogen at about 50-90 degree Celsius and at a pressure of 30-50 bar.
• Electrolysers are commercially available at a size of a few kilowatts (kW) to megawatts (MW).

 

What are the different electrolyser technologies?

• There are various electrolyser technologies available currently.
• Alkaline electrolysers and polymer electrolyte membrane (PEM) electrolysers are commercially available technologies.
• Alkaline electrolysers use liquid alkaline electrolyte solution of sodium or potassium hydroxide while PEM electrolysers are based on solid polymer membrane.
• In addition to these, there are other proprietary technologies like electrochemical, thermally-activated chemical (E-TAC) and anion exchange membrane (AEM) that claim to be more efficient than existing technology options.

 

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Q1) What is India's National Green Hydrogen Mission?

The National Green Hydrogen Mission was approved by the Union Cabinet on 4 January 2022, with the intended objectives of: Making India a leading producer and supplier of Green Hydrogen in the world & Creation of export opportunities for Green Hydrogen and its derivatives.

Source: The Hindu