讲座时间：2022年11月24号（星期四）14:00-15：30
Zoom会议链接： https://iu.zoom.us/j/4522142163
演讲主题：Geochemical modeling of CO2-water-rock interaction and its applications to carbon sequestration
The storage in deep saline aquifers of CO2 captured at point sources such as coal-fired power plants or directly capture from the atmosphere is a strategy that many regard as critical to limiting global warming to less than 1.5 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? 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.
This lecture will give an overview of geological carbon sequestration efforts and of the research advances in reaction kinetics and geochemical modeling necessary to predict the safety of CO2 storage. Recent innovative research by my students and collaborators on applying non-traditional stable isotope tracers in geochemical kinetics experiments has broken new ground in near-equilibrium reaction kinetics, which is critically relevant to CCS. The Sleipner Project in Norway is the world’s first industrial-scale CO2 storage project. I will present results of numerical simulations of CO2 fate and geochemical reactions at this site. The connections among the hydrosphere, lithosphere, and atmosphere as well as the overlap between basic science and pressing societal needs—the hallmark of groundwater sciences—become clear through a tour of the fascinating and intriguing CCS efforts around the world.
Prof. Chen Zhu
Indiana University
Chen Zhu is a Professor of Earth and Atmospheric Sciences at Indiana University. He is also an adjunct professor in the School of Public and Environmental Affairs and School of Public Health at Indiana University. He specializes in water’s reactions with minerals and rocks. Zhu holds a Ph.D. from the Johns Hopkins University, an MSc from the University of Toronto, a BS from the Chengdu University of Technology, and a postdoctoral fellowship at the Woods Hole Oceanographic Institution. Zhu was a Fulbright Scholar and the 2006 recipient of the John Hem Award from the (US) National Ground Water Association. Zhu has been elected a fellow of the American Association for the Advancement of Science, the Mineralogical Society of America, and the Geological Society of America. Currently, Zhu serves as a co-Executive Editor for Groundwater published by the (US) National Groundwater Association. His book with Greg Anderson, Environmental Applications of Geochemical Modeling published by Cambridge University Press, is used as a textbook at universities around the world.
