compressed natural gas as a fuel

CNG AS A FUELby M.Hashaam

CONTENTS Introduction Preparation Maintenance Properties Advantages Disadvantages Uses Conclusion

INTRODUCTION CNG is an acronym of

compressed natural gas. It is used as a substitute fossil

fuel for gasoline (petrol), diesel, propane.

It is safer than other fuels in the sense that natural gas is lighter than air and disperses quickly when released.

LOGOS OF CNG

PREPARATION It is made by compressing the natural

gas (composed of low molecular mass

hydrocarbons mainly methane) to less than 1% of the volume at standard atmospheric pressure. It is stored in hard cylindrical containers at a pressure of 20-25 MPa.

Natural gas is mostly methane , one carbon atom.

MAINTENANCE Proper training is required for all

maintenance personnel working on CNG vehicles. The oil in a CNG vehicle does not need to be changed as frequently because CNG burns more cleanly than gasoline , producing less deposits in the oil.

PROPERTIES Lighter than Air. Colourless and odourless. Does not catch fire easily. Low Density Non toxic

ADVANTAGES It is cheaper than other fuels

and has more efficiency It is dispersed quickly when

released thus produces less pollution

It releases less carbon dioxide into the atmosphere when burnt

CONTD. CNG powered vehicles have

lower maintenance cost than other hydrocarbon powered vehicles

It increases the life of lubricating oils

DISADVANTAGES CNG tank requires

more storage space.

CNG made engine vehicles are more costly than other fuel engines of the same car.

Contd. CNG filling

stations have limited availability as compared to gasoline.

CNG engine Is low power engine than the gasoline engine.

USES CNG is used in many vehicles like bikes

and cars.

It is also used in commercial vehicles like light duty truck and medium duty trucks like vans , postal vehicles and school buses.

FIRST CNG BIKE AND CAR

Top ten countries with most CNG vehicles

country No. of vehicles in millions   Iran 2.86

Pakistan 2.85

Argentina 2.07

Brazil 1.7

India 1.1

Italy 0.78

China 0.61

Colombia 0.36

Uzbekistan 0.31

Thailand 0.30

World Total 14.8

CONCLUSION Based on the previous slides for the

Performance and Emission of compressed natural gas, It is concluded that the compressed natural gas represents a good alternative fuel for engine and therefore must be taken into consideration in the future for transport purpose.