Comparison of CNG-LNG-LPG as a vehicle fuel

Natural gas and propane are widely used in industrial and home applications. they are also being employed as a clean burning vehicle fuels. there are over 14 million CNG and LPG vehicles on the road today.The benefits of using CNG, LNG , LPG in vehicles include: Emission , Reduced Fuel Costs,Increased Safety,Energy Security. Liquefied Petroleum Gas is liquefied by moderate compression at normal temperatures and is stored in special tanks.The pressure of these tanks is usually about 200 psi. Liquefied Natural Gas (LNG) is natural gas in its liquid form cooled to -161 degrees Celsius. The LNG must be stored and transported in a pressurised, double tank. CNG - is natural gas in gaseous state made by compressing natural gas 200–220 bar (2900–3200 psi), and usually stored in cylindrical or spherical shapes.