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Offshore Oil and Gas Production and Transportation
Published in Shashi Shekhar Prasad Singh, Jatin R. Agarwal, Nag Mani, Offshore Operations and Engineering, 2019
Shashi Shekhar Prasad Singh, Jatin R. Agarwal, Nag Mani
Triethylene glycol (TEG) is the most commonly used glycol for such an operation. The benefits of TEG include: Superior dew point depressionEasy to regenerate up to 99% of utilized chemicalsHigher decomposition temperatureHigh operation reliability and low operating costsLow vaporization losses
Principal Field Processing Operations and Field Facilities
Published in Hussein K. Abdel-Aal, Economic Analysis of Oil and Gas Engineering Operations, 2021
Glycol dehydration is a liquid desiccant system for the removal of water from natural gas and NGLs. It is the most common and economical means of water removal from these streams. Triethylene glycol (TEG) is used to remove water from the natural gas stream in order to meet the pipeline quality standards. This process is required to prevent hydrates formation at low temperatures or corrosion problems due to the presence of CO2 or H2S (regularly found in natural gas). Dehydration, or water vapor removal, is accomplished by reducing the inlet water dew point (temperature at which vapor begins to condense into a liquid) to the outlet dew point temperature, which will contain a specified amount of water.
Landfill—The Ultimate Disposal
Published in Luis F. Diaz, George M. Savage, Clarence G. Golueke, Resource Recovery from Municipal Solid Wastes, 2018
Luis F. Diaz, George M. Savage, Clarence G. Golueke
The Triethylene Glycol (TEG) system is widely used for gas dehydration because of the unusual hygroscopicity of glycols, their excellent thermal and chemical stability, low vapor pressures, and ready availability at moderate cost. Gas entering the system is compressed and bulk contaminants are removed in a knockout drum. After compression and cooling to remove the bulk of the water, the gas enters a TEG absorber/separator tower. Free liquids in the gas stream are removed in the lower part of the tower (the separator section) as the stream ascends to the upper or absorber section of the tower. In the absorber section, the gas stream contacts lean triethylene glycol on bubble-cap trays.
Aqueous mixtures of AMP, HMDA-N,N′-dimethyl and TEG for CO2 separation: a study on equilibrium and reaction kinetics
Published in Chemical Engineering Communications, 2020
Mayurkumar P. Patil, Prakash D. Vaidya
The role of water in amine-based absorbents is multifunctional. For example, it reduces viscosity, improves heat and mass transfer, and influences ionic reactions in solutions. However, water has high heat capacity and absorption enthalpy (Barzagli et al., 2012), and much energy is needed to heat water during the regeneration process. Thus, it is desirable to use a less volatile co-solvent together with water that will reduce evaporation of the absorbent, and hence, the energy consumption. Triethylene glycol (TEG, see Figure 1) is a prospective co-solvent with low volatility and high boiling point. It is stable and non-degrading, and is capable of regenerating MEA-based solutions even at low temperature (Tan et al., 2011). It is now known that the absorption heat of AMP/TEG mixtures is lower than that of MEA/TEG (Zheng et al., 2012). Earlier, we employed TEG as co-solvent for AMP/HMDA/H2O mixtures (Patil and Vaidya, 2018).