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Prediction of water content of sour and acid gases

Zirrahi, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.fluid.2010.10.012
  3. Publisher: 2010
  4. Abstract:
  5. Estimating the feasibility of acid gas geological disposal requires the knowledge of the water content of the gas phase at moderate pressures and temperatures (typically below 50MPa, below 380K) and up to 6mol NaCl. In this paper, a non-iterative model is developed to predict the water content of sour and acid gases at equilibrium with pure water and brine. This model is based on equating the chemical potential of water and using the modified Redlich-Kwong equation of state to calculate the fugacity of the gas phase. The water content of pure CH4, CO2 and H2S are represented with average absolute deviations of less than 3.36, 7.04 and 8.4%, respectively. Experimental data of the water content of mixtures of the acid gases were reproduced with average absolute deviations of less than 6.32%
  6. Keywords:
  7. Brine ; Natural gas ; Acid gas ; Average absolute deviation ; Experimental data ; Gasphase ; Geological disposals ; Moderate pressures ; Non-iterative ; Pure water ; Redlich-Kwong equation ; Acids ; Equations of state of gases ; Sodium chloride ; Sour gas ; Water content ; Gases
  8. Source: Fluid Phase Equilibria ; Volume 299, Issue 2 , December , 2010 , Pages 171-179 ; 03783812 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0378381210005236