How does glycol dehydrate natural gas?

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natural gas The Troll A natural gas production platform in the North Sea, 80 km (50 miles) northwest of Bergen, Norway. Troll A, the largest movable structure ever built, rests on the seafloor some 300 metres (990 feet) below the surface and rises more than 100 metres (330 feet) above the sea. The platform regulates the recovery of gas from 40 wells located on the seafloor.

Glycol dehydration is a critical process used to prevent the formation of icelike gas hydrates, which can obstruct plant operations and transportation pipelines.1

In this process, a glycol solution is injected directly into the natural gas process stream. The glycol acts as an absorbent, effectively pulling dissolved water out of the gas. Once the glycol has absorbed the water, the resulting mixture is separated from the dehydrated gas stream. To maintain efficiency, the glycol solution is then heated to evaporate the absorbed water, allowing the glycol to be recycled and reused in the system.1

This method is essential for ensuring that natural gas remains free of moisture that could otherwise condense and cause operational difficulties during processing.1