Pentane, hexane, and heptane are called natural gasoline or condensate. Refiners blend natural gasoline with other gasoline. Natural gas liquids are classified as light hydrocarbons. Hydrocarbons, which occur in natural gas and petroleum, are a group of compounds that contain only the elements hydrogen and carbon. All hydrocarbons become liquid under certain combinations of temperature and pressure, depending on their molecular weight.
Light hydrocarbons liquefy at lower temperatures and higher pressures than do heavy hydrocarbons.
There are two main methods of producing NGL, condensation and absorption. In condensation, natural gas is chilled until it becomes a liquid from which the NGL are extracted. In absorption, processors mix gas with an oil that absorbs light hydrocarbons. NGL are then distilled from the oil. Co. How to cite this article.