Energy and Natural Resources

Efficient Gas Dehydration Technology

05 January 2017

ExxonMobil has developed new technology for natural gas dehydration that employs a patented absorption system inside pipes and replaces the need for conventional dehydration tower technology. The cMISTTM (Compact Mass transfer and Inline Separation Technology) can be deployed at both land-based and offshore natural gas production operations.

The technology efficiently removes water vapor present during the production of natural gas as a means of reducing corrosion and equipment interference, helping to ensure the safe and efficient transport of natural gas through the supply infrastructure and ultimately to consumers.

A new absorption system replaces the need for conventional dehydration tower technology. Source: ExxonMobilA new absorption system replaces the need for conventional dehydration tower technology. Source: ExxonMobilcMISTTM reduces the size, weight, and cost of dehydration, resulting in reductions of surface footprint by 70% and the overall dehydration system’s weight by half, which has significant added benefits on offshore applications.

A proprietary droplet generator breaks up conventional solvent into tiny droplets that become well dispersed in the gas flow, increasing the surface area for the absorption of water from the gas. An inline separator then coalesces the water-rich glycol droplets and moves them to the outside wall of the pipe for separation from the dehydrated natural gas.

Water-rich glycol is regenerated using a conventional system and is sent back to the droplet generator for reuse. The droplet generator uses the energy from the flowing natural gas to create droplets of the right size.

The technology has been licensed to the Chemtech division of Sulzer to facilitate deployment across the oil and gas industry.

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Discussion – 1 comment

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Re: Efficient Gas Dehydration Technology
2017-Jan-08 1:04 PM

I have always wondered what becomes of the excess glycol that remains dry and, presumably, does not migrate to the water extraction process, rather, seemingly, continues in the NG stream as a nominal contaminant.

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