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Hydrogen-enriched compressed natural gas (HCNG)

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Hydrogen-enriched compressed natural gas (HCNG):


Why in News?

Ministry of Road Transport and Highways has allowed use of H-CNG (18% mix of hydrogen) in CNG engines.

  • A notification for amendments to the Central Motor Vehicles Rules 1989, for inclusion of H-CNG as an automotive fuel has already been published.

Background:

The Bureau of Indian Standards (BIS) has also developed specifications (IS 17314:2019) of Hydrogen enriched Compressed Natural Gas (H-CNG) for automotive purposes, as a fuel.

What is HCNG?

The blending of hydrogen with CNG provides a blended gas termed as HCNG.

  • It can be used in place of gasoline, diesel fuel and propane (C3H8) / LPG and its combustion produces fewer undesirable gases.

Advantages of HCNG:

  • HCNG reduces emissions of CO up to 70%.
  • Enables up to 5 % savings in fuel.
  • First step towards future Hydrogen economy.
  • Engines can be calibrated to release lower amounts of NO.
  • Engines need minimum modification to run on HCNG.
  • Ideal fuel for high load applications and heavy-duty vehicles.
  • Better performance due to higher Octane rating of H2.

Disadvantages of using HCNG:

  • Determining the most optimized H2/ NG (Natural Gas) ratio.
  • It requires new infrastructures for preparing HCNG.
  • Many steps need to be taken for commercializing it at a large scale.
  • Current cost of H2 is more than the cost of Natural Gas. So, HCNG’s cost is more than CNG.

hcng

Sources: pib.