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The AAPG/Datapages Combined Publications Database
Environmental Geosciences (DEG)
Abstract
DOI:10.1306/eg.01141312010
Geochemical sequestration reactions within the Lamotte Sandstone at five different locations in Missouri
Nelson Rono,1 Richard Biagioni,2 Charles Rovey II,3 Melida Gutierrez4
1Chemistry Department, Missouri State University, Springfield, Missouri 65897; [email protected]
2Chemistry Department, Missouri State University, Springfield, Missouri 65897; [email protected]
3Department of Geography, Geology and Planning, Missouri State University, Springfield, Missouri 65897; [email protected]
4Department of Geography, Geology and Planning, Missouri State University, Springfield, Missouri; [email protected]
AUTHORS
Nelson Rono graduated with a M.S. degree in chemistry from Missouri State University in 2012. He has taught chemistry courses in Technical University of Kenya. His interests include environmental chemistry, analytical instrumentation, and geochemical modeling.
Richard Biagioni received a Ph.D. in chemistry from the University of California at Berkeley in 1981. He is currently a professor of chemistry at Missouri State University teaching courses in environmental and analytical chemistry. His research focuses on application of analytical methods to a variety of chemistry-related problems.
Charles Rovey received a Ph.D. in geoscience from the University of Wisconsin-Milwaukee in 1990. He is currently a professor of geology at Missouri State University with active research interests in the hydrostratigraphy of the Ozark and St. Francois aquifer systems of Missouri and the regional stratigraphy of pre-Illinoian glacial sediments.
Melida Gutierrez holds a Ph.D. in geohydrology from the University of Texas at El Paso. She is a professor of geology at Missouri State University, teaching courses in geology and geochemistry. Her research focuses on rock-water interaction and sediment geochemistry.
ACKNOWLEDGEMENTS
This material is based on a work sponsored by the Department of Energy, National Energy Technology Laboratory, under award number DEFG2610FE0001790 to the Missouri State University. Profound gratitude goes to the staff of the Missouri Department of Natural Resources for their help on mineral cores, water chemistry, well logs, and temperature data.
ABSTRACT
Geochemical reactions that may occur on CO2 injection into a sandstone formation in Missouri (MO) were investigated by means of geochemical modeling. Five possible injection sites were considered: two in the northwestern part of the state, two in the northeastearn part, and one in the southwestern part. The Geochemist Workbench software was used to investigate solubility trapping and mineral precipitation. Modeling was performed for two periods: an injection period of 10 yr and a postinjection period where the reactions proceeded to equilibrium. The work presented substantial challenges. Among them are uncertainty in kinetic constants for the dissolution and precipitation of minerals on CO2 injection. 
Model
results include equilibrium values for CO2 stored via solubility trapping ranging from 49-g CO2/kg free formation water in Northeast MO to 78-g CO2/kg free formation water for Southwest MO. Mineral trapping is significantly lower, between 2.6- and 18.4-g CO2/kg free formation water. The model
shows siderite and dawsonite as the major carbonate minerals formed, in this order. On a volumetric basis, northwest MO sequestration values were slightly greater than those obtained for northeast MO because of the somewhat greater depth and higher injection pressure at the injection target (Lamotte Sandstone) at the northwestern sites. However, the greater thickness of the aquifer for the northeastern sites provided overall greater sequestration capacity. Greene County was altogether unfit for sequestration because of the low total dissolved solids value of the formation water.
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