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USA: Exxon Mobil Uses Patented Absorption System in Pipes

New Technology to Dehydrate Natural Gas

| Editor: Alexander Stark

ExxonMobil has licensed cMIST technology to the Chemtech division of Sulzer, a manufacturer of separation technologies, to facilitate deployment across the oil and gas industry.
ExxonMobil has licensed cMIST technology to the Chemtech division of Sulzer, a manufacturer of separation technologies, to facilitate deployment across the oil and gas industry. (Source: Exxon Mobil)

Exxon Mobil announced its development of cMist technology, which dehydrates natural gas using a patented absorption system inside pipes and replaces the need for conventional dehydration tower technology.

Houston/USA — This “in-line” technology could be deployed at both land-based and offshore natural gas production operations. The new technology, developed and extensively field-tested by the company, more efficiently removes water vapor present during the production of natural gas, Exxon announced. Removing water vapor through the use of dehydration technology, typically accomplished using large and expensive dehydration towers, reduces corrosion and equipment interference helping to ensure the safe and efficient transport of natural gas through the supply infrastructure and ultimately to consumers.

According to the company, this technology 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. The application relies on a proprietary droplet generator to break up conventional solvent into tiny droplets that become well dispersed in the gas flow thereby increasing the surface area for the absorption of water from the gas. This is followed by an inline separator that coalesces the water-rich glycol droplets and moves them to the outside wall of the pipe for effective separation from the dehydrated natural gas. The water-rich glycol is regenerated using a conventional system and is sent back to the droplet generator to be used again. The droplet generator uses the energy from the flowing natural gas to create droplets of the right size.

“By leveraging our industry-leading experience with upstream applications, our researchers were able to create this advanced natural gas dehydration technology, which represents a step-change in operational efficiency and a significant reduction in footprint,” said Tom Schuessler, president of Exxon Mobil Upstream Research Company.

Exxon Mobil has licensed cMist technology to the Chemtech division of Sulzer, a manufacturer of separation technologies, to facilitate deployment across the oil and gas industry.

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