In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements:

1. The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions.
2. H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions.
3. Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses.
4. H-CNG makes the fuel less expensive than CNG.

Which of the statements given above is / are correct?

H-CNG is a blend of Compressed Natural Gas (CNG) and hydrogen, offering a cleaner and more efficient fuel for internal combustion engines.

While H-CNG reduces Carbon Monoxide (CO) emissions by up to 70%, it does not eliminate them entirely.

H-CNG leads to a reduction in both Carbon Dioxide (CO2) and Hydrocarbon emissions.

It is feasible to blend hydrogen with CNG up to approximately one-fifth (20%) by volume for use in buses. For example, the Delhi Government partnered with Indian Oil Corporation Limited (IOCL) to explore blending 18-20% hydrogen in CNG buses on a trial basis.

Currently, hydrogen production costs are higher than natural gas, making H-CNG more expensive than CNG.

Statement 1 is incorrect. Statements 2 and 3 are correct. Statement 4 is incorrect. Hence, only statements 2 and 3 are correct.

Sources:

• Insights on India - Rajya Sabha TV In-Depth: HCNG – Fuel of the Future