CNG is one of the cleanest and most environment friendly fuel as compared to other fuels used by automotive vehicles. The level of vehicular emissions is significantly lower in case of CNG when compared to liquid fuels like Diesel and Petrol.
As per CPCB report 2010, it has been observed that due to predominant use of CNG as a transport fuel, even in highly populated metros of Mumbai and Delhi the share of vehicular exhaust emissions is 6% and 7% respectively as compared to 21% in Kanpur and 41% in Bangalore (cities predominantly using liquid fuels for transport).
Every 1 MMSCMD domestic PNG caters to about 20 lakh households and can replace about 180 lakh subsidized cylinders
Domestic PNG not only provides convenience and is much safer. it also indirectly saves a lot of fuel and efforts that are required in managing logistics of domestic LPG cylinders.
Increased use of CNG and PNG, substituting liquid fuels, would also lead to significant reduction in the subsidy burden of the Government.
CNG has several distinctions over other fuels:
- No impurities, No Sulphur (S), No lead (Pb)
- Very low levels of polluting gaseous emissions without smell and dust
- Molecular structure compactness prevents the reactive processes which leads to the formation of Ozone (O3) in the troposphere.
- Lighter than air - in case of leak no dangerous puddles
- Unlikely to ignite due to High ignition temperature
- Lowest injury and death rate per vehicle mile
- CNG cylinders structurally most sound and have passed severe tests
- Cheaper than conventional fuel.
- Payback period is short
- Very high antiknock power (more than 120 ON) allows greater performance compared to petrol.
- It has no evaporation leaks and spills of fuel, during re-fueling.
- Its combustion produces very low quantity of carbon deposits (permits a longer life of lubricant oil, spark plug, piston drum, valves & other components)
Features and Advantages - Collected from Wikipedia
- Compressed natural gas (CNG) is Methane stored at high pressure.
- It can be used in place of gasoline (petrol), Diesel fuel and propane/LPG.
- It is safer than other fuels in the event of a spill, because natural gas is lighter than air and disperses quickly when released.
- CNG combustion produces fewer undesirable gases than the fuels like petrol,diesel and LPG.
- CNG is made by compressing natural gas (which is mainly composed of methane, CH4), to less than 1 percent of the volume it occupies at standard atmospheric pressure.
- CNG does not contain any lead, thereby eliminating fouling of spark plugs(unleaded fuel is lead free, but still can cause plugs to foul).
- CNG is less likely to ignite on hot surfaces, since it has a high auto-ignition temperature (540 °C), and a narrow range (5–15 percent) of flammability.
- Less pollution and more efficiency: CNG emits significantly fewer pollutants (e.g., carbon dioxide (CO2), unburned hydrocarbons (UHC), carbon monoxide (CO), nitrogen oxides (NOx), sulfur oxides (SOx) and PM (particulate matter) than petrol.
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