The differences between natural gas and liquefied petroleum gas as followsÂ
| Properties | Natural gas | Liquefied petroleum gas |
|---|---|---|
| Types of source | It is primary gaseous fuel obtained from oil fields Two types of natural gas are dry natural gas and wet natural gas It cannot be liquefied under pressure |
It is secondary gaseous fuel obtained by fractional distillation of crude petroleum or cracking heavy oils Two types of LPG are LPG containing only propane and LPG containing only butane It can be easily liquefied under pressure |
| Chemical composition | CNG contain CH4 (70 to 90%), C2 to C4 hydrocarbons (10 to 30%,Hydrocarbon having more than 4 carbon atoms (0.3 to 3%), CO (1%), CO (1 to 2%), N2 (0.5 to 5%) The impurities such as traces of CO2 ,N2,H2S and water vapours are present |
in LPG contains propane, butane, little amounts of pentane and hexane It contains almost no impurities |
| Heating values | CNG has a calorific value of about 13000cal\l. | LPG has a calorific value of about 25000 cal\L. |
| Time at construction | Slow and time-consuming construction. | Fast and speed construction. |
| Uses | Used as domestic, industrial and motor fuel and preparation for various organic compounds. | Used as domestic, industrial and motor fuel |