What are the advantages and disadvantages of CNG and LPG gases?

Answer 1

The Advantages of Compressed Natural Gas

The Environmentally Clean Advantage Compressed natural gas is the cleanest burning fuel operating today. This means less vehicle maintenance and longer engine life. CNG vehicles produce the fewest emissions of any motor fuel. Dedicated Natural Gas Vehicles (NGV) have little or no emissions during fueling. In gasoline vehicles, fueling emissions account for at least 50% of a vehicle's total hydrocarbon emissions. CNG produces significantly less pollutants than gasoline. Tailpipe emissions from gasoline operated cars release carbon dioxide, which contributes to global warming. This is greatly reduced with natural gas. The Maintenance Advantage Some fleet operators have reduced maintenance costs by as much as 40% by converting their vehicles to CNG. Intervals between tune-ups for natural gas vehicles are extended 30,000 to 50,000 miles. Intervals between oil changes for natural gas vehicles are dramatically extended--anywhere from 10,000 to 25,000 additional miles depending on how the vehicle is used. Natural gas does not react to metals the way gasoline does, so pipes and mufflers last much longer. The Performance Advantage Natural gas gives the same mileage as gasoline in a converted vehicle. Dedicated CNG engines are superior in performance to gasoline engines. CNG has an octane rating of 130 and has a slight efficiency advantage over gasoline. Because CNG is already in a gaseous state, NGVs have superior starting and driveability, even under severe hot and cold weather conditions. NGVs experience less knocking and no vapor locking. The CNG Cost Advantage Natural gas is cheaper per equivalent gallon than gasoline (an average of 15% to 50% less than gasoline)

Answer 2

It is echo friendly. Calorific value is more. It has less ignition temperature.More work per unit volume.It causes less solution.