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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.
Feedstock Preparation
Published in James G. Speight, Handbook of Petrochemical Processes, 2019
An example of absorption dehydration is known as glycol dehydration—the principal agent in this process is diethylene glycol which has a chemical affinity for water (Mokhatab et al., 2006; Speight, 2007; Abdel-Aal et al., 2016). Glycol dehydration involves using a solution of a glycol such as diethylene glycol or triethylene glycol, which is brought into contact with the wet gas stream in a contactor. In practice, absorption systems recover 90%–99% by volume of methane that would otherwise be flared into the atmosphere.
Offshore Production
Published in Sukumar Laik, Offshore Petroleum Drilling and Production, 2018
The ‘glycol dehydration process’ is an absorption process, where the water vapour in the gas stream becomes dissolved in a relatively pure glycol liquid solvent stream. Glycol dehydration is relatively inexpensive, as the water can be easily ‘boiled’ out of the glycol by the addition of heat. This step is called ‘regeneration’ or ‘reconcentration’ and enables the glycol to be recovered for use in absorbing additional water with minimal loss of glycol. The type of glycol commonly used is either di-ethylene glycol (DEG) or tri-ethylene glycol (TEG).
Neural computing approach for estimation of natural gas dew point temperature in glycol dehydration plant
Published in International Journal of Ambient Energy, 2020
Alireza Ghanbari, Mohammad Navid Kardani, Ali Moazami Goodarzi, Milad Janghorban Lariche, Alireza Baghban
According to conventional TEG dehydration unit presented in Figure 1, Lean TEG, free from water, enters the top section of the contactor. Wet natural gas and Lean TEG are contacted in a countercurrent mode flow. It should be noted in a glycol dehydration system that minimum TEG concentration is a crucial factor in determining gas dew point temperature (Ahmadi and Ebadi 2014; Yun 2001).
Applying SVM scheme for modeling of natural gas dew point
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2018
Seyed Hossein Hosseini Nazhad Ghazani
According to conventional TEG dehydration unit presented in Figure 1, Lean TEG, free from water, enters the top section of the contactor. Wet natural gas and Lean TEG are contacted in a countercurrent mode flow. It should be noted in a glycol dehydration system that minimum TEG concentration is a crucial factor in determining gas dew point temperature (Ahmadi and Ebadi 2014; Yun 2001).