Modeling of the Coldfinger water exhauster for advanced TEG regeneration in natural gas dehydration

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Abstract

The performance of natural gas dehydration using triethylene glycol (TEG) strongly depends on the purity level of TEG in the regeneration unit. Coldfinger is a TEG regeneration technology reported to be capable of increasing TEG purity to levels above 99.8 wt.%, but conceptual models of this equipment appear to be lacking. This work presents a methodology for modeling Coldfinger, where the equipment is represented as two theoretical equilibrium stages operating at different temperatures in the presence of internal vapor recirculation. The key parameters governing the functioning of the equipment are discussed on the basis of a series of simulations carried out for different top temperatures and internal recirculation ratios. The results demonstrate that a regeneration of TEG up to approximately 99.9 wt.% is achievable by injecting smalls amounts of dry gas, considerably lower than conventional enhanced TEG regeneration by gas stripping.

Original languageEnglish
Book seriesChemical engineering transactions
Volume74
Pages (from-to)661-666
Number of pages6
ISSN1974-9791
DOIs
Publication statusPublished - 2019

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Glycols
Dehydration
Natural gas
Water
Gases
triethylene glycol
Vapors
Temperature

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title = "Modeling of the Coldfinger water exhauster for advanced TEG regeneration in natural gas dehydration",
abstract = "The performance of natural gas dehydration using triethylene glycol (TEG) strongly depends on the purity level of TEG in the regeneration unit. Coldfinger is a TEG regeneration technology reported to be capable of increasing TEG purity to levels above 99.8 wt.{\%}, but conceptual models of this equipment appear to be lacking. This work presents a methodology for modeling Coldfinger, where the equipment is represented as two theoretical equilibrium stages operating at different temperatures in the presence of internal vapor recirculation. The key parameters governing the functioning of the equipment are discussed on the basis of a series of simulations carried out for different top temperatures and internal recirculation ratios. The results demonstrate that a regeneration of TEG up to approximately 99.9 wt.{\%} is achievable by injecting smalls amounts of dry gas, considerably lower than conventional enhanced TEG regeneration by gas stripping.",
author = "Logrono, {Iveth Alexandra Romero} and Anders Andreasen and Nielsen, {Rudi P.} and Marco Maschietti",
year = "2019",
doi = "10.3303/CET1974111",
language = "English",
volume = "74",
pages = "661--666",
journal = "Chemical engineering transactions",
issn = "1974-9791",
publisher = "AIDIC",

}

Modeling of the Coldfinger water exhauster for advanced TEG regeneration in natural gas dehydration. / Logrono, Iveth Alexandra Romero; Andreasen, Anders; Nielsen, Rudi P.; Maschietti, Marco.

In: Chemical engineering transactions, Vol. 74, 2019, p. 661-666.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Modeling of the Coldfinger water exhauster for advanced TEG regeneration in natural gas dehydration

AU - Logrono, Iveth Alexandra Romero

AU - Andreasen, Anders

AU - Nielsen, Rudi P.

AU - Maschietti, Marco

PY - 2019

Y1 - 2019

N2 - The performance of natural gas dehydration using triethylene glycol (TEG) strongly depends on the purity level of TEG in the regeneration unit. Coldfinger is a TEG regeneration technology reported to be capable of increasing TEG purity to levels above 99.8 wt.%, but conceptual models of this equipment appear to be lacking. This work presents a methodology for modeling Coldfinger, where the equipment is represented as two theoretical equilibrium stages operating at different temperatures in the presence of internal vapor recirculation. The key parameters governing the functioning of the equipment are discussed on the basis of a series of simulations carried out for different top temperatures and internal recirculation ratios. The results demonstrate that a regeneration of TEG up to approximately 99.9 wt.% is achievable by injecting smalls amounts of dry gas, considerably lower than conventional enhanced TEG regeneration by gas stripping.

AB - The performance of natural gas dehydration using triethylene glycol (TEG) strongly depends on the purity level of TEG in the regeneration unit. Coldfinger is a TEG regeneration technology reported to be capable of increasing TEG purity to levels above 99.8 wt.%, but conceptual models of this equipment appear to be lacking. This work presents a methodology for modeling Coldfinger, where the equipment is represented as two theoretical equilibrium stages operating at different temperatures in the presence of internal vapor recirculation. The key parameters governing the functioning of the equipment are discussed on the basis of a series of simulations carried out for different top temperatures and internal recirculation ratios. The results demonstrate that a regeneration of TEG up to approximately 99.9 wt.% is achievable by injecting smalls amounts of dry gas, considerably lower than conventional enhanced TEG regeneration by gas stripping.

U2 - 10.3303/CET1974111

DO - 10.3303/CET1974111

M3 - Journal article

VL - 74

SP - 661

EP - 666

JO - Chemical engineering transactions

JF - Chemical engineering transactions

SN - 1974-9791

ER -