Types of Hydrogen

➖ Green hydrogen is produced through electrolysis using renewable sources of energy such as solar, wind or hydel power.

➖ Grey hydrogen is generated through fossil fuels such as coal and gas and currently accounts for 95% of the total production in South Asia.

➖ Blue hydrogen, too, is produced using electricity generated by burning fossil fuels but with technologies to prevent the carbon released in the process from entering the atmosphere.

➖ Brown hydrogen is produced using coal where the emissions are released to the air.

➖ Pink hydrogen is generated through electrolysis powered by nuclear energy. Nuclear-produced hydrogen can also be referred to as purple hydrogen or red hydrogen.

➖ Turquoise hydrogen is made using a process called methane pyrolysis to produce hydrogen and solid carbon. In the future, turquoise hydrogen may be valued as a low-emission hydrogen, dependent on the thermal process being powered with renewable energy and the carbon being permanently stored or used.

➖ Yellow hydrogen is a relatively new phrase for hydrogen made through electrolysis using solar power.

➖ White hydrogen is a naturally-occurring geological hydrogen found in underground deposits and created through fracking.

🔺 Note: ✓ India’s first 99.99% pure green hydrogen pilot plant was set up in eastern Assam’s Duliajan.
✓ Green hydrogen can be stored for long periods of time. The stored hydrogen can be used to produce electricity using fuel cells.