Propane

Propane is one of the fossil fuels in liquefied petroleum gas (LPG). In the U.S., liquefied petroleum gas consists mostly of propane, with small quantities of butane and other light hydrocarbons in various mixtures. U.S. LPG mixtures are typically 90-95 percent propane and are sold under that name. Propane is widely used for heating, cooking, and in industry as a raw material for chemical manufacturing.

Propane comes from natural gas and crude oil. Despite the "liquefied petroleum" name, roughly two-thirds of the propane used in the United States is extracted from raw natural gas. Raw natural gas is natural gas that hasn't been cleaned and processed yet. Raw natural gas contains about 92 percent methane, and most of the rest is a mixture of ethane and the "LP" gases. Propane is separated from natural gas at a natural gas processing plant.