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| Titel |
Effects of trace gas components in carbon capture and storage: geochemical experiments and simulation of laboratory-scale brine-rock-CO2-trace gas interaction |
| VerfasserIn |
Susanne Stadler, Thomas Nowak, Katja Heeschen, Andreas Riße, Christian Ostertag-Henning |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250033038
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| Zusammenfassung |
| In the research activities on geological storage of carbon dioxide many studies mainly focus
on the impact of pure CO2 gas on the storage formations. However, flue gas streams of power
plants not only contain CO2, but also number of trace gases such as O2, N2, Ar, NOX, SOX,
CO, H2, H2S, COS and CH4. These trace gases may not only interact with pipeline material,
but can also trigger short-term and long-term changes within the subsurface storage lithology.
The chemical reactivity of each of these compounds has to be evaluated and their
interactions with each other have to be understood, especially since some of them are far
more reactive than CO2. Within the project COORAL (= CO2 Purity for Capture
and Storage) we concentrate on geochemical investigations to determine reaction
pathways and kinetics of different mineral phases typical for potential German storage
formations as influenced by the presence of trace gases within the flue gas stream.
Quantitative measurements of these reactions are relatively well described for pure CO2
systems but are so far not well described for multi-component mixtures. We combine
laboratory experiments (batch and flow-through) with numerical simulations applying
the geochemical simulators PHREEQC and ChemApp, which will be coupled to
GeoSys/RockFlow for coupled thermo-hydro-mechanical-chemical (THMC) process
simulations. Calculations and experiments are performed for temperatures up to 200°C and
pressures up to 50 MPa. The aim of the study is to determine optimal maximum
concentration levels of trace gases in flue gas streams to be used in geological CO2
storage. |
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