Geologic CO2 sequestration (GCS) in subsurface saline aquifers is a promising strategy to mitigate climate change caused by increasing anthropogenic CO2 emissions from energy production. At GCS sites, interactions between fluids and geomedia are important because they can affect CO2 trapping efficiency and the safety of CO2 storage. These interactions include the dissolution and precipitation of minerals. One of the most important minerals is calcium carbonate, because it can permanently trap CO2. In this work, Portland cement was used as a model geomedium to investigate the chemical reactions, mechanical alterations, transport of reactive fluids, and the interplay of all these aspects. (Abstract shortened by ProQuest.)
|Commitee:||Flores, Katharine M., Fortner, John D., Giammar, Daniel E., Steefel, Carl I., Zhang, Fuzhong|
|School:||Washington University in St. Louis|
|Department:||Energy, Environmental and Chemical Engineering|
|School Location:||United States -- Missouri|
|Source:||DAI-B 78/01(E), Dissertation Abstracts International|
|Subjects:||Environmental Geology, Environmental engineering|
|Keywords:||Calcium carbonate, Climate change, Geologic co2 sequestration, Nucleation, Reactive transport modeling, Wellbore cement|
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