Multicomponent vapor-liquid equilibrium measurements and modeling of triethylene glycol, water, and natural gas mixtures at 6.0, 9.0 and 12.5 MPa

Qvistgaard, Daniel; Trancoso, Julia; Solbraa, Even; Danielsen, Marie Vikre; Panteli, Eleni; Kontogeorgis, Georgios M.; Solms, Nicolas von

doi:10.1016/j.fluid.2022.113660

Cited by 3 publications

(13 citation statements)

References 27 publications

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“…These authors concluded that the best approach was to use a new set of parameters with the 4F association scheme. The more recent papers from this research group however , confirm that the 4C data set proposed by Derawi et al provides the best data fit when their more extensive experimental data set is used.…”

Section: Introductionmentioning

confidence: 55%

“…Similarly, Arya et al note that “ some new experimental data have to be obtained in order to confirm the existing data sets for the TEG content of a methane vapor phase’ ”. During the preparation of this manuscript, new data was presented by Qvistgaard et al and Trancoso et al which adds to the experimental database. However, much of this data was collected at 25 °C or below, and all experiments contain between 15 and 300 ppm of water vapor.…”

Section: Introductionmentioning

confidence: 99%

“…However, much of this data was collected at 25 °C or below, and all experiments contain between 15 and 300 ppm of water vapor. In Qvistgaard et al, “real” and “synthetic” gas mixtures are used that contain water vapor, CO 2 , and heavier hydrocarbons. These authors note that at some experimental conditions, the “synthetic” gas contains significantly more TEG than the “real” gas, possibly due to a solvation effect from the higher concentrations of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…In Qvistgaard et al, “real” and “synthetic” gas mixtures are used that contain water vapor, CO 2 , and heavier hydrocarbons. These authors note that at some experimental conditions, the “synthetic” gas contains significantly more TEG than the “real” gas, possibly due to a solvation effect from the higher concentrations of CO 2 . All workers note the difficulty in obtaining accurate vapor pressure data due to the extremely low TEG concentrations being measured.…”

Section: Introductionmentioning

confidence: 99%

“…Literature data and simulations for the concentration of TEG in ppm in methane as a function of system pressure at 25 °C. Literature data is from Qvistgaard et al, Fisher et al, Jerinic et al, and Trancosco et al Simulations use the CPA equation of state (eq ) with parameters from Derawi et al and a binary interaction parameter of k ij = 0.136 or 0.1634.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Triethylene Glycol Solubility in High-Pressure Methane: New Experimental Data at 40 to 60 °C

Soroodan,

El-Okazy,

Macario

et al. 2024

Ind. Eng. Chem. Res.

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Increasing ambient temperatures in inland locations has meant that triethylene glycol (TEG) absorbers used to dehydrate raw natural gas may need to operate at temperatures of up to 60 °C. These higher temperatures may lead to increased TEG slippage into the downstream gas, but the extent of this slippage is not readily estimated due to a lack of appropriate vapor−liquid equilibrium data. In this work, new laboratory data for the gas phase concentration of triethylene glycol (TEG) in highpressure methane (CH 4 ) are presented, at pressures of up to 134 bar and temperatures of 40, 50, and 60 °C. The new data are consistent with published data for TEG solubility in high-pressure CH 4 at lower temperatures and are readily described by a Cubic-Plus-Association (CPA) model using existing model parameters. The CPA model yields an average absolute relative deviation (AARD) of 53% relative to the new experimental data when a binary interaction parameter of 0.136 is used, and this increases slightly to 57% when the literature value of 0.1643 is used.

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Section: Introductionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Triethylene Glycol Solubility in High-Pressure Methane: New Experimental Data at 40 to 60 °C

Soroodan,

El-Okazy,

Macario

et al. 2024

Ind. Eng. Chem. Res.

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Vapor–Liquid Equilibrium Measurements and Cubic-Plus-Association Modeling of Triethylene Glycol Systems

Trancoso,

Solbraa,

Kontogeorgis

et al. 2024

J. Chem. Eng. Data

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Use of a New Gas Ejector for a TEG/TREG Natural Gas Dehydration System

Bernat,

Nagy,

Smulski

2023

Energies

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Glycol dehydration is the most common and economical water removal method from natural gas streams. However, dehydration of low-pressure natural gas requires the use of higher concentration TEG (Triethylene Glycol) or TREG (Tetraethylene Glycol). This article describes how the ejector can be used to create a vacuum in the glycol reboiler to achieve a higher concentration of L-TEG/L-TREG (Lean Triethylene Glycol/Lean Tetraethylene Glycol). Process simulations of the gas dehydration and glycol regeneration units were carried out in Chemcad software. Simulations were performed for decreasing values of gas working pressure and TEG/TREG regeneration pressures. Dehydration unit efficiency was tested for two values of glycol flow rates. Ejector performance simulations were executed for two positions in the process flow line. The influence of pressure reduction in the glycol reboiler on the concentration of L-TEG/L-TREG and the water dewpoint of natural gas has to be found significant. The increase in glycol flow rate has a greater impact on TREG than for TEG. Creating a vacuum with an ejector in a TEG/TREG reboiler has been shown to be an attractive way to improve the efficiency of natural gas dehydration. The position of the ejector at the end of the vapor flow line, downstream to the condensed water separator, allows for a significant reduction in motive gas consumption.

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Multicomponent vapor-liquid equilibrium measurements and modeling of triethylene glycol, water, and natural gas mixtures at 6.0, 9.0 and 12.5 MPa

Cited by 3 publications

References 27 publications

Triethylene Glycol Solubility in High-Pressure Methane: New Experimental Data at 40 to 60 °C

Triethylene Glycol Solubility in High-Pressure Methane: New Experimental Data at 40 to 60 °C

Vapor–Liquid Equilibrium Measurements and Cubic-Plus-Association Modeling of Triethylene Glycol Systems

Use of a New Gas Ejector for a TEG/TREG Natural Gas Dehydration System

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