Natural gas liquids extraction and separation

Natural gas liquids (NGL) are a group of hydrocarbons, sometimes referred to as purity NGL, that includes ethane, propane, normal butane (n-butane), isobutane and natural gasoline (pentanes plus). NGL made their inroad into fuel markets in the 1910s, when the issue of gasoline loss while stored under normal conditions was addressed, leading to a way to bottle liquid gas. NGL are produced predominantly in gas processing plants and, to a lesser extent, in refineries as homogeneous liquid blends of purity NGL. The NGL extracted from natural gas make up the so-called Y-grade NGL from which ethane, propane, n-butane, iso-butane and pentanes plus are separated by fractionation in a distillation u