LIQUIFIED PETROLEUM GAS (LPG)
LPG is a predominant mixture of propane and butane with a small percentage of unsaturates (propylene and butylene)and some lighter C2 as well as heavier C5 fraction. Included in the LPG range are propane, propylene, normal and isobutane and butylene. It is obtained as one of the top fractions in the fractional distillation of petroleum. LPG may be defined as those hydrocarbons, which are gaseous at normal atmospheric pressure, but may be condensed to the liquid state at normal temperature, by the application of moderate pressures. Although they are normally used as gases, they are stored and transported as liquids under pressure for convenience and ease of handling. Liquids under pressure for convenience and ease of handling. Liquid LPG on evaporation produces 250 times more volume of gas. Composition of LPG: n-butane = 70% Isobutane = 17% n-propane = 11% Butylene and ethane = rest Calorific Value: Its calorific value is 27,000 kcal/m3. Uses: Used as a fuel for domestic cooking. Used