Hydrocarbons liquefied at the surface in field facilities or in gas processing plants.

A mechanical device that is used to move a fluid.

A product specification for the heavier liquid products as determined by ASTM test procedure D-323.

Sedment and water contained in hydrocarbon liquid streams.

Methane and components produced by processes other than at a wellhead.

A number proportional to the heat input to a burner at constant pressure. In British practice, it is the heating value of a gas divided by the square root of its gravity. Widely used in Europe, together with a measured or calculated flame speed, to determine interchangeability of fuel gases.

A fluid used to remove components from a gas stream by direct contact.

A tower or column that provides contact between natural gas, being processed and a liquid solvent.

A factor which is an indication of the tendency for a given gas phase component to be transferred to the liquid solvent. It is generally expressed as A = L/KV where L and V are the molar flows of liquid and vapor, and K is the average value of the vapor-liquid equilibrium constant for the component of concern.

A plant that processes natural gas with absorption oil, sometimes referred to as a "lean oil" plant.

Refer to definition of "absorber."

A mechanical refrigeration system in which the refrigerant is absorbed by a suitable liquid or solid. The most common system uses ammonia as the refrigerant and water as the absorbing medium. Refer to definition of "compression refrigeration cycle."

A vessel used to facilitate the control of the flow of liquid or the separation of liquid from accompanying gas or vapor as the liquid flows through the plant for further processing.

A gas stream that contains hydrogen sulfide and/or carbon dioxide.

The expansion of a gas, vapor, or liquid stream from a higher pressure to a lower pressure in which the enthalpy of the stream does not change.

A solid substance used to remove components from natural gas being processed.

Removal of certain components from a gas stream onto a solid substance—including, but not limited to, one or more of the following: acid gases, water vapor, or heavier hydrocarbon vapors.

A fin tube exchanger which utilizes air for cooling. Ambient air contacts the external fins by fan-forced or natural draft to cool the process fluid inside the tubes.

The maximum rate, composition or process variable permitted by contract or regulatory body.

Any of several compounds such as, but not limited to, monoethanolamine, HOC2H4NH2, (MEA), employed in treating natural gas.

A unit designed to remove the sour components of a stream with a contactor and a regenerator to reuse the amine.

Non-combustible residue from the gasification or burning of coal or a heavy hydrocarbon.