Simulation and optimization of sweetening and dehydration processes in the pretreatment unit of a mini-scale natural gas liquefaction plant

Zarezadeh, Fatemeh; Vatani, Ali; Palizdar, Ali; Nargessi, Zahra

doi:10.1016/j.ijggc.2022.103669

Cited by 11 publications

(2 citation statements)

References 28 publications

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“…Hydrates are a group of nonstoichiometric, ice-like crystalline compounds formed by gas and water molecules. − The main components of natural gas, such as CH 4 and C 2 H 6 , are relatively easy to form hydrates. Once natural gas hydrate (NGH) is formed, it will deposit rapidly, which will not only block the wellbore but also cause permanent damage to downhole equipment . Therefore, the prevention of hydrate formation is very important for the safe and efficient exploitation of natural gas reservoirs. − …”

Section: Introductionmentioning

confidence: 99%

“…Once natural gas hydrate (NGH) is formed, it will deposit rapidly, which will not only block the wellbore but also cause permanent damage to downhole equipment. 16 Therefore, the prevention of hydrate formation is very important for the safe and efficient exploitation of natural gas reservoirs. 17−19 Song et al 20 measured the isobaric solubility of pure methane and ethane gases in liquid water under a temperature range of 273.15−290.15 K and a pressure range of 0.66 MPa to 3.45 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Modeling Study on Phase Equilibria of the Methane + Ethane Gas Mixture

Sun,

Zhao,

Gao

et al. 2023

J. Chem. Eng. Data

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The study on phase behavior and physical properties of natural gas has great significance for its safe exploitation and transportation. Consequently, we studied the phase equilibria of the methane + ethane gas mixture in this work. The hydrate formation conditions (gas–liquid–hydrate equilibria) of the methane + ethane gas mixture were measured first in pure water. Then the gas solubility (gas–liquid equilibria) of the gas mixture in water was measured with/without hydrate. Finally, the bubble point and dew point (vapor–liquid equilibria) and the hydrate formation conditions and gas solubility in the presence of hydrate were calculated. The results show that before hydrate formation, the gas solubility in water decreases with temperature and increases with pressure. However, after hydrate formation, the gas solubility increases with temperature and decreases with pressure. The calculation models in this work have satisfactory accuracy for phase equilibria prediction of the methane + ethane gas mixture. Therefore, it has a good guiding significance for describing the phase behavior of natural gas.

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