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A SAFT Equation of State for the H2S-CO2-H2O-NaCl system and applications for CO2 - H2S transportation and geological storage
LuleƄ University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
Department of Geological Science, Indiana University, Bloomington.
2013 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 37, 3780-3791 p.Article in journal (Refereed) Published
Abstract [en]

When H2S is co-injected with CO2, we need to know thermodynamic properties and phase equilibria for the CO2-H2S- H2O-NaCl system in order to evaluate the sequestration capacity, optimal transportation and injection conditions, potential for pipeline corrosion, and increased risk of storage and leakage. Here, we summarize the results of the phase equilibrium and densities for CO2-sequestration related systems from a thermodynamic model that is based on statistical associating fluid theory equation of state. The proposed thermodynamic model can be used to represent equilibrium compositions in both phases (H2O-rich/aqueous phases and gas-rich/nonaqueous phases) and the density at equilibrium or in the one phase region. The effect of H2S on the properties of CO2 streams and on the CO2 solubility and the corresponding aqueous solution density can be predicted to provide a knowledge base for both transportation and geological storage. In addition, as other ions such as Ca, Mg, K and SO4 have been taken into account in the model, the properties for brine instead of aqueous NaCl solutions can also be predicted. The equation of state can be incorporated into reservoir simulators to model the separation of phases in multi-phase flow and fluid reactions with reservoir rocks

Place, publisher, year, edition, pages
2013. Vol. 37, 3780-3791 p.
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-29637DOI: 10.1016/j.egypro.2013.06.274Local ID: 32d6d375-e294-478d-86e6-59718dd76426OAI: oai:DiVA.org:ltu-29637DiVA: diva2:1002861
Note
Validerad; 2013; 20121212 (andbra); Konferensartikel i tidskriftAvailable from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-30Bibliographically approved

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