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Using TEG Plants for Improved Dehydration Jun 20, 2013

Gas pre-treatment is typically comprised of four stages. Dehydration forms the second stage of this process. During this stage, water is removed from the natural gas stream. This is necessary in order to avoid freezing from occurring in the pipeline during the liquefaction process. The natural gas feed must be thoroughly dry and should not contain any miniscule traces of water before it enters the cooling section during the liquefaction process. The primary solvent typically used in order to dehydrate gases is Triethylene Glycol, often referred to simply as TEG. 

When TEG encounters moist natural gas, it is able to absorb the water. A contractor tower is commonly used along with a structured packing bed in order to make the most of the contact between the TEG and the gas. The resulting water and TEG mixture can then be transferred to a recycling system. At that point, a filtering and heating process can be utilized to remove the TEG from the water. Custom gas dehydration packages can prove to be highly beneficial in order to meet specific gas composition and conditions. 

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