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SUMMARY:How Are Geochemical Reactions in Aquifers Connected to Climate Cha
 nge Mitigation? - Chen Zhu ( Indiana University)
DTSTART:20210311T150000Z
DTEND:20210311T160000Z
UID:TALK154507@talks.cam.ac.uk
CONTACT:Oliver Shorttle
DESCRIPTION:The storage in deep saline aquifers of CO2 captured at point s
 ources such as coal-fired power plants is a strategy that many regard as c
 ritical 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 ~1
 0\,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 reactio
 ns and degrade water quality? Our ability to understand and predict geoche
 mical reactions in aquifers is critical for answering these questions.\n\n
 This lecture will give an overview of geological carbon sequestration effo
 rts and of the research advances in reaction kinetics and geochemical mode
 ling necessary to predict the safety of CO2 storage. Recent innovative res
 earch 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 CC
 S . The Mt. Simon Sandstone in the U.S. Midwest and the Sleipner Project i
 n Norway represent planned and fully operational industrial-scale CO2 stor
 age projects\, respectively. I will present examples of numerical simulati
 ons of CO2 fate and geochemical reactions from both projects. The connecti
 ons among the hydrosphere\, lithosphere\, and atmosphere as well as the ov
 erlap 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.\n
LOCATION:https://zoom.us/j/99244613406
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