Green hydrogen policy

 

Context:

A green hydrogen policy in collaboration with the Union Government’s ‘National Green Hydrogen Mission’ is on the cards, along with the possibility of a green hydrogen pilot project through the PPP model.

 

Background:

Hydrogen is the lightest and first element on the periodic table. Since the weight of hydrogen is less than air, it rises in the atmosphere and is therefore rarely found in its pure form, H2.

  • At standard temperature and pressure, hydrogen is a nontoxic, nonmetallic, odorless, tasteless, colorless, and highly combustible diatomic gas.
  • Hydrogen fuel is a zero-emission fuel burned with oxygen. It can be used in fuel cells or internal combustion engines. It is also used as a fuel for spacecraft propulsion.

 

Types:

 

  • Green hydrogen is defined as hydrogen produced by splitting water into hydrogen and oxygen using renewable electricity. This is a very different pathway compared to both grey and blue.
  • Grey hydrogen is traditionally produced from methane (CH4), split with steam into CO2 – the main culprit for climate change – and H2, hydrogen. Grey hydrogen has increasingly been produced also from coal, with significantly higher CO2 emissions per unit of hydrogen produced, so much that is often called brown or black hydrogen instead of grey. It is produced at industrial scale today, with associated emissions comparable to the combined emissions of UK and Indonesia. It has no energy transition value, quite the opposite.
  • Blue hydrogen follows the same process as grey, with the additional technologies necessary to capture the CO2 produced when hydrogen is split from methane (or from coal) and store it for long term.

Source: THE HINDU.

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