Dorthe Wildenschild, Ph.D., is an associate professor in the School of Chemical, Biological and Environmental Engineering at Oregon State University. Research in her group focuses on physics, chemistry, and microbiology of relevance to flow and transport in porous media. Much of her work is supported by high resolution imaging and applications primarily involve subsurface multiphase flow phenomena.
What Happens in the Pore, No Longer Stays in the Pore: Opportunities and Limitations for Porous Media Characterization and Process Quantification Using X-ray Tomography
Optimizing Capillary Trapping as a Carbon Dioxide Mitigation Strategy: Pore-Scale Findings in Support of Larger-Scale Implementation
Discover how x-ray microtomography is being studied for possible use as a technique to optimize capillary trapping of carbon dioxide in this presentation. Capillary trapping is amechanism supporting carbon capture and storage (CCS), which is being considered as a mitigation strategy for emissions from concentrated sources such as coal-fired power plants.
Initial work using x-ray microtomography has focused on proxy fluid-based systems and experiments carried out at ambient conditions. As the interfacial tension, viscosity, and carbondioxide injection (as well as subsequent brine flood injection) rates are varied, trends have been observed with the type of porous medium (unconsolidated vs. consolidated), varying wetting and nonwetting phase viscosity, and flow rates. The latter in particular has been investigated for its effect on morphology and connectivity of the trapped nonwetting phase (i.e., the supercritical carbon dioxide).
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