GasDehydration

By: Pvs Group  09-12-2011
Keywords: Gas, Natural Gas, Dehydration

Dehydration prevents the formation of gas hydrates and reduces corrosion. Natural gas in transit to market should be dehydrated to a controlled water content to avoid hydrate formation as well as minimize corrosion problems. The major methods of dehydration are:
- Direct cooling (Joules Thomson Expansion)
- Adsorption (or solid bed) dehydration
- Pressure Swing Adsorption (PSA)
- Membrane Technology
- Absorption (Absorption of Water in Glycols)

Glycol dehydration units are most predominantly used for removing large amounts of water, and adsorption is used for cryogenic systems to reach low moisture contents. A TEG dehydration unit is mainly a combined absorption/stripping type process. The wet gas is dehydrated in the absorber and the stripping column regenerates the TEG. Utilizing the PVSG design, we can achieve a water level of 1 Ib/MMscf.


Keywords: Dehydration, Gas, Natural Gas

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