22 March 2017

Difference between LPG and CNG

LPG full form Liquefied petroleum gas is a mixture of propane and butane liquefied at 150C and a pressure of 1.7 to 7.5 bar While CNG full form Compressed Natural Gas which is mainly methane compressed at a pressure of 200 to 245 bar.

Now you need to select the best option that would serve as your best friend in your daily activities. So now we have discussed the difference between LPG and CNG that help you decided in which the best for you.

Basic Difference between LPG and CNG:


LPG - Liquefied petroleum gas

CNG - Compressed natural gas


LPG - Artificial in nature.

CNG - It is natural gas.


LPG - Composed of propane and butane. 

CNG - Major component is methane.


LPG - Automatically generated while natural gas extraction and also while crude oil refining process.

CNG - Obtained from natural gas, condensate wells, oil well, coal bed methane wells.


LPG - It is difficult to get disperse so that the risk of fire is more.

CNGEasily disperses so that the risk of ignition is minimized.

Environmental Effect:

LPG - Release gas like CO2 which is greenhouse gas serves as a great cleaner comparing to gasoline.

CNG - Release the minimum amount of greenhouse gases.


LPG uses - Heating and cooking in homes, refrigeration, industrial, agricultural, catering, and automobile fuel.

CNG uses - Alternative of gasoline in Automobile.


LPG Properties -
  • It is highly inflammable.
  • It is heavier than air.
  • Leakage will accumulate in low lying areas and settle down to the floor.
CNG properties - 
  • It is highly inflammable.
  • It is lighter than air.
  • Disperses quickly during leakage.

Some key difference between LPG and CNG:

  • LPG has a higher energy content than CNG.
  • LPG density is greater than CNG.
  • There is a number of hydrocarbon gases that fall into the category of LPG while in CNG just two most common properties propane and butane are used.
  • LPG needs more oxygen as compared to CNG.
LPG requires oxygen to gas ratio - 25 to 1
CNG requires oxygen to gas ratio - 10 to 1 

Explore more information: 

  1. Advantages and disadvantages of LPG
  2. Which gas present in LPG?
  3. What does LPG stand for? 
  4. What are the uses of LPG?
  5. What is the full form of LPG?
  6. LPG acronyms and Abbreviations
  7. Difference between petrol and diesel oil