Integrated Experimental and Modeling Studies of Mineral Carbonation as a Mechanism for Permanent CS in Mafic/Ultramafic Rocks

 

An autoclave is used to create elevated pressures<br/>and temperatures. Basalt samples are placed into<br/>the autoclave where geochemical analyses can be<br/>performed in conditions similar to those encountered<br/>within basaltic formations under real world conditions.
An autoclave is used to create elevated pressures
and temperatures. Basalt samples are placed into
the autoclave where geochemical analyses can be
performed in conditions similar to those encountered
within basaltic formations under real world conditions.
Performer: 
Yale University
Website:  Yale University
Award Number:  FE0004375
Project Duration:  10/01/2010 – 09/30/2014
Total Award Value:  $2,466,092
DOE Share:  $1,938,746
Performer Share:  $527,346
Technology Area:  Geologic Storage Technologies and Simulation and Risk Assessment
Key Technology:  Geochemical Impacts
Location:  New Haven, Connecticut

Project Description

This project provided rigorous estimates of the carbon storage potential of mafic and ultramafic rocks through the process of in-situ mineral carbonation. Mafic and ultramafic rocks contain low levels of silica and high levels of calcium-rich minerals that react with CO2 to form solid carbonate minerals, thus permanently isolating it from the atmosphere. The project involved two related, interdisciplinary parts: (1) geochemical experiments and modeling on individual minerals and rock assemblages to determine kinetics and thermodynamics of the main mineral carbonation reactions, and (2) geomechanical experiments and modeling to elucidate processes accompanying the carbonation reactions, such as flow and deformation, which can significantly alter the effective reaction rates in actual rock formations.

Project Benefits

This project focused on the key chemical reactions that occur as a result of the injection of CO2 into both ultramafic/basaltic rocks and sedimentary rocks, including saline aquifers and petroleum reservoirs. Improved monitoring contributes to improved storage techniques thus reducing CO2 emissions to the atmosphere. Specifically, this project achieved its targets by: (1) evaluating the geochemical and geomechanical aspects of CO2 mineral carbonation, and (2) using mineral-fluid-organic reactions that create or reduce porosity and may catalyze the in situ reduction of CO2 to organic compounds.

Contact Information

Federal Project Manager 
William O'Dowd: william.odowd@netl.doe.gov
Technology Manager 
Traci Rodosta: traci.rodosta@netl.doe.gov
Principal Investigator 
Zhengrong Wang: zhengrong.wang@yale.edu
 

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