The main components and properties of the two are different. LPG (Liquefied Petroleum Gas) Liquefied petroleum gas is a mixture of propane and butane, often accompanied by small amounts of propylene and butylene. Ethyl mercaptan, a strong odorant, is often added so that LPG leaks can be easily detected. Liquefied petroleum gas is produced when crude oil is refined, or is a gas emitted from oil or natural gas extraction processes. Liquefied petroleum gas (LPG) is often mistaken for propane.
In fact, LPG is a mixture of oil and natural gas formed under appropriate pressure and exists in a liquid state at normal temperature. LNG (Liquefied Natural Gas), whose main component is methane, is colorless, odorless, non-toxic and non-corrosive. Its volume is about 1/625 of the same volume of gaseous natural gas. The quality of LNG is only about 45% of the same volume of water.
