Speaker: Prof Chen Zhu, Indiana
Abstract: The storage in deep saline aquifers of CO2 captured at point sources such as coal-fired power plants is a strategy that many regard as critical to limiting global warming to less than 2 degrees Celsius. But is Carbon Capture and Storage (CCS) safe? Might reactions between CO2, the native brine, and the host rocks modify the reservoir structure within ~10,000 years? Where does the injected CO2 go and what is its fate? Can CO2 escape to the overlying drinking water aquifers to cause unwanted reactions and degrade water quality? Our ability to understand and predict geochemical reactions in aquifers is critical for answering these questions.
Zhu, C., Rimstidt, J.D., Zhang, Y.L., Kang, J.T., Schott, J. and Yuan, H.L. (2020) Decoupling feldspar dissolution and precipitation rates at near-equilibrium with Si isotope tracers: Implications for modeling silicate weathering. Geochim. Cosmochim. Acta 271, 132-153.
Zhang, G., Lu, P., Wei, X. and Zhu, C. (2016) Impacts of Mineral Reaction Kinetics and Regional Groundwater Flow on Long-Term CO2 Fate at Sleipner. Energy & Fuels 30, 4159-4180.