Difference Between CNG and LPG in Tabular Form

CNG is made of Methane and LPG is made of Propane. On the other hand, the biggest similarity is that both of them are renowned environmentally clean alternatives to petroleum products like gasoline (petrol) and diesel.

 

 

 

What is CNG?

CNG is a form of natural gas in its compressed form that is obtained from oil wells, natural gas wells, and also from coal wells. It is mostly made up of methane that is produced by compressing natural gas (methane) up to 1/100th of its original volume at standard atmospheric pressure.

Just because they emit fewer greenhouse gases than other fossil fuels, they are widely replacing gasoline (petrol) or diesel as the primary fuel for running our automobiles. The easiest way to transport and distribute CNG from its refineries to various distribution centers is through pipelines.

Not to mention, it can also be stored and transported in cylindrical or spherical-shaped containers. CNG is cheap. However, just because the calorific value of CNG is lower than LPG, it is not as cost-effective as compared to LPG. To be precise, the calorific value of CNG is 38 MJ/m³.

Advantages of CNG over LPG

Some of the advantages of CNG over LPG are:

• CNG is cheap
• CNG is light
• Produces less CO₂ than LPG
• CNG is safe, if spilled, disperses fastly into the air, etc.

Disadvantages of CNG over LPG

Some of the disadvantages of CNG over LPG are:

• CNG is not cost-effective
• CNG has low calorific value, etc.

What is LPG?

LPG is mostly made up of propane and a small amount of butane that is basically obtained during the extraction process of natural gas from its reservoir or sometimes during the refining of petroleum (crude oil). No wonder they produce fewer greenhouse gases than other fossil fuels but more than Compressed Natural Gas.

To be exact, it emits 19% less CO₂ per kWh than oil and 30% less CO₂ per kWh than coal respectively. The primary uses of LPG include heating and cooking in homes and have a large number of applications in the industrial as well as in the agricultural sector.

It can also be used as fuel in our automobiles. To protect the Ozone layer from further deteriorating, nowadays, LPG is also replacing Chlorofluorocarbons as a refrigerant. The easiest way to transport and distribute LPG is in cylindrical or spherical-shaped containers.

LPG is expensive. However, just because it has a high calorific value, produces more energy than the equivalent amount of natural gas. That’s why LPG is more cost-effective than CNG. To be precise, the calorific value of LPG is 46 MJ/m³.

Advantages of LPG over CNG

Some of the advantages of LPG over CNG are:

• LPG is cost-effective
• High calorific value
• LPG produces more energy than the equivalent amount of natural gas, etc.

Disadvantages of LPG over CNG

Some of the disadvantages of LPG over CNG are:

• LPG is expensive,
• Produces more CO₂ than CNG
• LPG is heavy if spilled, dispersed slowly in the air, etc.

 

Similarities Between CNG and LPG

Now is the time that we should talk about some of the similarities between CNG and LPG. Some of them are:

• Both of them are non-renewable energy resource
• They are environmentally clean
• Both of them are less expensive than other fossils
• They both are highly flammable
• They are both colorless and odorless
• Both of them are non-corrosive and non-toxic, etc.

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