With reference to Liquefied Petroleum Gas (LPG) and Liquefied Natural Gas (LNG), consider the following statements -
- LPG is primarily methane, while LNG is mainly a mixture of propane and butane.
- LNG requires extreme cooling below -160°C and specialised cryogenic tanks for storage, whereas LPG can become liquid under moderate pressure or low temperatures.
- LNG is directly used for cooking and as a vehicle fuel, while LPG is mainly regasified for industrial applications.
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Explanation - Liquefied Petroleum Gas (LPG) is mainly a mixture of propane and butane, produced as a byproduct of crude oil refining and natural gas processing. It may also contain small amounts of other hydrocarbons. In contrast, Liquefied Natural Gas (LNG) is primarily methane, derived from natural gas. Liquefaction Process and Storage — LPG becomes liquid under moderate pressure or low temperatures, making it relatively easy to store and transport. LNG, however, requires extreme cooling below -160°C and must be stored in specialised cryogenic tanks, making its handling more complex and energy-intensive. Volume and Transportation Advantage — Both fuels are liquefied to reduce volume for transport. LPG reduces to about 1/260th of its gaseous volume, while LNG shrinks further to about 1/600th, enabling efficient long-distance transportation, especially where pipelines are not feasible. Usage and Applications — LPG is widely used for cooking, heating, and some industrial applications, and also as a vehicle fuel in certain regions. LNG itself has limited direct use but is mainly transported and then converted back into natural gas, which is used for cooking, transport (CNG), and industries such as fertilisers, power generation, refineries, and petrochemicals.
Explanation - Liquefied Petroleum Gas (LPG) is mainly a mixture of propane and butane, produced as a byproduct of crude oil refining and natural gas processing. It may also contain small amounts of other hydrocarbons. In contrast, Liquefied Natural Gas (LNG) is primarily methane, derived from natural gas. Liquefaction Process and Storage — LPG becomes liquid under moderate pressure or low temperatures, making it relatively easy to store and transport. LNG, however, requires extreme cooling below -160°C and must be stored in specialised cryogenic tanks, making its handling more complex and energy-intensive. Volume and Transportation Advantage — Both fuels are liquefied to reduce volume for transport. LPG reduces to about 1/260th of its gaseous volume, while LNG shrinks further to about 1/600th, enabling efficient long-distance transportation, especially where pipelines are not feasible. Usage and Applications — LPG is widely used for cooking, heating, and some industrial applications, and also as a vehicle fuel in certain regions. LNG itself has limited direct use but is mainly transported and then converted back into natural gas, which is used for cooking, transport (CNG), and industries such as fertilisers, power generation, refineries, and petrochemicals.