Physics student examines impact of capturing and storing waste carbon dioxide
To change the course of global warming, researchers are seeking methods to mitigate the release of greenhouse gases into the atmosphere. One method, carbon sequestration, involves capturing waste carbon dioxide and preventing its atmospheric release by placing it in a storage site, often located underground.
Nicola Peyko, a Mickey Leland Energy Fellowship (MLEF) Program participant, was given the task of determining how the Marcellus shale, a unit of sedimentary rock that spreads across eastern North America, would react when injected with carbon dioxide.
Alongside her mentor, Jonathan Moore, at the National Energy Technology Laboratory (NETL) in Morgantown, West Virginia, Peyko used computerized tomography (CT) scans, flow data and X-ray diffraction data to analyze how fractured samples of the shale would respond under “reservoir-like” conditions when exposed to carbon dioxide. They were particularly interested in whether the fractures would swell. This project required a variety of advanced software processing techniques such as ImageJ and Ilastik to determine the efficacy of extracting fracture data from the CT scans and relating the data to the hydraulic results.
“Hopefully my project will contribute to the long-term goal of sequestering carbon dioxide,” Peyko said. “Reducing the carbon dioxide in the atmosphere would lead to cleaner air.”
Peyko applied to the program because of her interest in energy research. Also, she wanted to learn the structure of national laboratories and observe the range of studies being conducted.
After completing her bachelor’s degree in physics at Sonoma State University, Peyko plans to continue to do research. However, she envisions herself eventually encouraging other students to pursue science, technology, engineering and math (STEM) studies as a high school physics teacher. “I knew a STEM career was for me when I started doing research,” Peyko said. “I enjoy doing hands-on work and testing different variables to see what will happen.”
When considering her entire experience, Peyko said, “I learned a lot about advanced imaging software systems and testing on the various CT scanners. Also, I experienced the difference of how projects are completed in a government lab setting versus a university setting.”
The MLEF Program is administered by the Oak Ridge Institute for Science and Education (ORISE) for the U.S. Department of Energy.