10. Why CNG is called clean fuel?

Compressed Natural Gas (CNG) is considered a clean fuel for several reasons:

1. Low Emissions: CNG produces significantly lower emissions of pollutants compared to traditional fossil fuels such as gasoline and diesel. When burned in combustion engines, CNG emits fewer harmful pollutants such as carbon monoxide (CO), nitrogen oxides (NOx), particulate matter (PM), and sulfur dioxide (SO2). Reduced emissions contribute to improved air quality and public health by lowering the concentration of harmful pollutants in the atmosphere.

2. Lower Carbon Content: CNG has a lower carbon content compared to other fossil fuels. It consists primarily of methane (CH4), which contains fewer carbon atoms per molecule compared to hydrocarbons found in gasoline and diesel. As a result, burning CNG releases less carbon dioxide (CO2), a greenhouse gas responsible for global warming and climate change, into the atmosphere.

3. Abundant Domestic Resource: CNG is primarily composed of methane, which is abundant and widely available as a natural resource. It can be sourced domestically from natural gas reserves, reducing dependence on imported oil and promoting energy security.

4. Renewable Options: In addition to conventional natural gas, renewable sources of methane such as biogas and landfill gas can also be compressed and used as CNG. Biogas is produced from organic waste materials such as agricultural residues, sewage, and food waste through anaerobic digestion. Using renewable methane sources further reduces greenhouse gas emissions and promotes sustainable waste management practices.

5. Efficient Combustion: CNG combustion is more efficient compared to gasoline and diesel combustion. It has a higher octane rating, allowing for more complete combustion and reducing the formation of engine deposits and pollutants. CNG engines also operate at higher compression ratios, resulting in improved thermal efficiency and fuel economy.

6. Safety: CNG is lighter than air and disperses rapidly in the event of a leak, reducing the risk of fire or explosion compared to heavier-than-air fuels such as gasoline and diesel. CNG storage tanks are designed to withstand high pressures and are equipped with safety features such as pressure relief valves and automatic shut-off valves to minimize the risk of accidents.

Overall, the combination of lower emissions, abundant domestic supply, renewable options, efficiency, and safety features makes CNG a cleaner and more environmentally friendly alternative to traditional fossil fuels for transportation and energy applications.