Sensitivity of CO2 storage capacity of underground geological structures to the presence of SO2 and other impurities

Autor: Henk Kooi, Zaman Ziabakhsh-Ganji
Přispěvatelé: Dynamic Earth and Resources, Amsterdam Global Change Institute
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Applied Energy, 135(C), 43-52. Elsevier BV
Ziabakhshganji, Z & Kooi, H 2014, ' Sensitivity of CO2 storage capacity of underground geological structures to the presence of SO2 and other impurities ', Applied Energy, vol. 135, no. C, pp. 43-52 . https://doi.org/10.1016/j.apenergy.2014.08.073
ISSN: 0306-2619
DOI: 10.1016/j.apenergy.2014.08.073
Popis: Depleted hydrocarbon reservoirs and deep saline aquifers are key targets for geological storage of CO2 to reduce atmospheric CO2 emissions. Most studies in CCS investigate subsurface storage of pure CO2. In this paper we investigate the impact of the presence of other gases (impurities) in the injected CO2 stream on solubility trapping (in the aqueous phase) and volumetric trapping (in the non-aqueous phase, for a wide range of pressure and temperature. Calculations for solubility trapping are based on an equation of state that accurately accounts for the pressure, temperature, gas-compositional (mixtures) and salinity influences on CO2 solubility and brine density. For volumetric trapping the Peng–Robinson equation of state is used, accounting for binary interaction for gas mixtures and density correction. In the analysis, special attention is paid to the impact of SO2, which exhibits anomalous storage effects when compared to other common impurities. It is shown that while most impurities reduce the CO2 storage capacity (STC) in both the aqueous and non-aqueous phase, presence of SO2 enhances STC in both phases for a wide range of pressure and temperature conditions. However, for the realistic amounts of SO2 in flue gases, the effects are rather small; for a SO2 content of about 0.5% the non-aqueous STC enhancement ranges up to about 4%. For volumetric trapping, the greatest positive impact of SO2 occurs at relatively low pressures (74–100 bar) and temperatures (313–325 K). These are typical for shallow (
Databáze: OpenAIRE
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