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Dry Gas

Dry gas is a natural gas stream that contains little to no liquid hydrocarbons or water vapor.  Natural gas is a mixture of hydrocarbon gases, primarily methane, but can also contain other gases such as ethane, propane, and butane, as well as impurities like nitrogen, carbon dioxide, and hydrogen sulfide.  When natural gas is produced from a well, it may contain liquid hydrocarbons and water vapor, which can be separated from the gas through a process called gas conditioning.  Dry gas is the resulting natural gas stream after the separation of these liquids and water vapor.

Dry gas is usually transported through pipelines to end users such as power plants, industrial facilities, and residential and commercial customers.  It is also used as a feedstock for the production of chemicals such as ammonia, methanol, and hydrogen, as well as a fuel for vehicles and heating.  The purity of dry gas is an important factor in its use and transportation.  Any impurities or liquids in the gas stream can cause corrosion in pipelines, reduce the efficiency of equipment that uses the gas, or pose safety risks.  Therefore, dry gas is typically subject to quality control measures to ensure that it meets the necessary specifications for its intended use.

Dry Gas is Primarily Composed of the Following Elements
Dry gas is primarily composed of methane and contains very little heavier hydrocarbons or water vapor.  Dry gas is distinguished from wet gas, which contains higher concentrations of natural gas liquids (NGLs) such as propane, butane, and pentane.
Methane (\(CH_4\))  -  85–98%
Ethane (\(C_2H_6\))  -  0–10% (usually very low)
Carbon Dioxide (\(CO_2\))  -  0–2%
Nitrogen (\(N_2\))  -  0–2%
Helium (\(He\))  -  trace amounts
Hydrogen Sulfide (\(H_2S\))  -  typically none or trace amounts (if present, it's usually removed during processing)
Water Vapor (\(H_2O\))  -  very low or none (removed during dehydration process)

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