Reduce gas dehydration costs with high-efficiency mixing

E. Keachie, ProSep
Y. Lou, ProSep Inc.
G. Hallahan, ProSep

The gas dehydration process is typically carried out using a large contactor tower, where glycol [typically triethylene glycol (TEG), ethylene glycol (MEG) or diethylene glycol (DEG)] enters counter-currently to the process gas for optimum contact between glycol and gas during mass transfer. These towers consist of several stages, each accounting for one equilibrium stage of mass transfer (the absorption of water from gas to the glycol) to allow the gas to meet the required outlet specification for transport. However, conditions in the field change. If the natural gas is not meeting specification or if production increases, then the contactor tower must be optimized or replaced. Tower repla

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