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Non-iterative phase-equilibrium model of the H2O-CO2-NaCl-system for large-scale numerical simulations

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  • Grunwald, Norbert
  • Maßmann, Jobst
  • Kolditz, Olaf
  • Nagel, Thomas

Abstract

This article features a simple method for describing the phase equilibrium of the ternary water–salt–carbon dioxide system. At first, an iterative solution is shown using well known equations of state and solubility correlations to predict the compositions of liquid and gas phases in a saline aquifer. By virtue of several assumptions, iterations can be avoided entirely in order to use the method for demanding large-scale numerical simulations. Subsequently, the iterative method as well as the simplification are evaluated against experimental data. Both solutions provide adequate accuracy for engineering problems such as subsurface carbon dioxide storage.

Suggested Citation

  • Grunwald, Norbert & Maßmann, Jobst & Kolditz, Olaf & Nagel, Thomas, 2020. "Non-iterative phase-equilibrium model of the H2O-CO2-NaCl-system for large-scale numerical simulations," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 178(C), pages 46-61.
    • Handle: RePEc:eee:matcom:v:178:y:2020:i:c:p:46-61
    DOI: 10.1016/j.matcom.2020.05.024
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    References listed on IDEAS

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    1. Kolditz, O. & Bauer, S. & Böttcher, N. & Elsworth, D. & Görke, U.-J. & McDermott, C.-I. & Park, C.-H. & Singh, A.K. & Taron, J. & Wang, W., 2012. "Numerical simulation of two-phase flow in deformable porous media: Application to carbon dioxide storage in the subsurface," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 82(10), pages 1919-1935.
    2. Park, Chan-Hee & Lee, Seong Kon & Lee, Cholwoo & Kim, Seong-Kyun, 2018. "Applicability of thermal response tests for assessing in-situ CO2 storage in a saline aquifer," Energy, Elsevier, vol. 154(C), pages 210-220.
    3. Mroginski, Javier L. & Di Rado, H.Ariel & Beneyto, Pablo A. & Awruch, Armando M., 2010. "A finite element approach for multiphase fluid flow in porous media," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 81(1), pages 76-91.
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