COMPRESSED NATURAL GAS (CNG) AS A TRANSPORTATION FUEL
What is CNG?
Compressed natural gas, or CNG, is natural gas under pressure which remains clear, odorless, and non-corrosive. Although vehicles can use natural gas as either a liquid or a gas, most vehicles use the gaseous form compressed to pressures above 3,100 pounds per square inch.
How is natural gas produced?
Most natural gas comes from three types of wells: natural gas-and-condensate wells, oil wells, and coal bed methane wells. Well-extracted natural gas requires a cleanup process before it can be used in vehicles or residences.
Where does natural gas come from?
Major percentage of the natural gas used in the Pakistan comes from SUI. However, increasing demand for natural gas in power plants, CNG STATIONS, domestic industries and others will require new supplies from other resources in next 10 years.
How is natural gas stored?
In smaller fueling cylinders and on vehicles, CNG is stored in thick-walled steel, aluminum, or composite tanks built to last more than 05 years.
Is natural gas flammable?
When released, compressed natural gas will mix with air and become flammable only when the mixture is within 5 to 15 percent natural gas. When the mixture is less than 5 percent natural gas, it doesn't burn. When the mixture is more than 15 percent natural gas, there is not enough oxygen to allow it to burn. Because natural gas is lighter then air, it quickly dissipates when released from tanks.
What are the benefits of using natural gas in transportation?
Natural gas is produced worldwide and domestically at relatively low cost and is cleaner burning than petrol or diesel fuel. Natural gas vehicles show an average reduction in ozone-forming emissions of 80 percent compared to petrol vehicles.
What vehicles use natural gas?
CNG vehicles have been introduced in a wide variety of commercial applications, from light-duty trucks and Cars - like private car, taxi cabs, Rickshaws, Mazda to medium-duty trucks - like delivery vans and postal vehicles, to heavy-duty vehicles like transit buses.