Thermodynamic modelling of acid gas removal from natural gas using the Extended UNIQUAC model

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Abstract

Thermodynamics of natural gas sweetening process needs to be known for proper design of natural gas treating plants. Absorption with aqueous N-Methyldiethanolamine is currently the most commonly used process for removal of acid gas (CO2 and H2S) impurities from natural gas. Model parameters for the Extended UNIQUAC model have already been determined by the same authors to calculate single acid gas solubility in aqueous MDEA. In this study, the model is further extended to estimate solubility of CO2 and H2S and their mixture in aqueous MDEA at high pressures with methane as a makeup gas.
Original languageEnglish
JournalFluid Phase Equilibria
Volume442
Pages (from-to)38-43
ISSN0378-3812
DOIs
Publication statusPublished - 2017

Keywords

  • Thermodynamics
  • Extended UNIQUAC
  • High pressure
  • MDEA
  • Acid gas
  • Natural gas

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