CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment
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Case Western Reserve University School of Graduate Studies / OhioLINK
2006
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=case1124203454 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-case11242034542021-08-03T05:31:59Z CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment Zerai, Biniam CO2 sequestration Reactive transport simulation Rose Run Sandstone Geochemical modeling Particle Image Velocimetry <p>Storage of CO<sub>2</sub> in saline aquifers is one way to limit the buildup of greenhouse gases in the atmosphere. Large-scale injection of CO<sub>2</sub> into saline aquifers will induce a variety of coupled physical and chemical processes including multiphase fluid flow, solute transport, and chemical reactions between fluids and formation minerals. These issues were addressed using CO<sub>2</sub> solubility modeling, simulation using geochemical reaction, 1-D reactive transport and Particle Image Velocimetry (PIV).</p><p>Comparison of CO<sub>2</sub> solubility model against experimental data suggest that Duan and Sun (2003) CO<sub>2</sub> solubility model (DS-CSM) accurately modeled solubility of CO<sub>2</sub> in brine for range of temperatures, pressures and salinities. Modeling under equilibrium, path-of-reaction and kinetic rate using a reactor type Geochemists Workbench demonstrate that dissolution of albite, K-feldspar, and glauconite, and the precipitation of dawsonite and siderite are very important for mineral trapping of CO<sub>2</sub>.</p><p>A 1-D reactive transport was developed based on CO<sub>2</sub> solubility model that take in to account the high salinity of Rose Run brine and a module that calculates the equilibrium constants based on temperature and pressure. The results indicate that the extent of sequestration through solubility and mineral trapping is sensitive to the choice of CO<sub>2</sub> solubility model and the fugacity of CO<sub>2</sub>. Reactive transport modeling underscores in the long-run siderite and dawsonite minerals are important sink in trapping CO<sub>2</sub> in the Rose Run Sandstone but over a short time-scale the hydrodynamic trapping plays a crucial role. The calculated storage capacity using DS-CSM suggest that for the first 100 years, 90 percent of the injected CO<sub>2</sub> trapped as free CO<sub>2</sub> whereas 6 percent are trapped in dissolve form and the rest sequestered in minerals.</p><p>Micro-scale single-phase flow through a network model of porous rock was investigated using experimental and numerical analysis. PIV with refractive index matching was developed to map velocity of pore-scale fluid flow through acrylic two-dimensional network without chemical reaction. Experimentally determined velocity vectors for single-phase flow through pore bodies and adjoining throats as well as for the outlet of the flow cell were compared with numerical simulations of flow through the cell using FLUENT computer code.</p> 2006 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case1124203454 http://rave.ohiolink.edu/etdc/view?acc_num=case1124203454 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
CO2 sequestration Reactive transport simulation Rose Run Sandstone Geochemical modeling Particle Image Velocimetry |
| spellingShingle |
CO2 sequestration Reactive transport simulation Rose Run Sandstone Geochemical modeling Particle Image Velocimetry Zerai, Biniam CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment |
| author |
Zerai, Biniam |
| author_facet |
Zerai, Biniam |
| author_sort |
Zerai, Biniam |
| title |
CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment |
| title_short |
CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment |
| title_full |
CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment |
| title_fullStr |
CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment |
| title_full_unstemmed |
CO<sub>2</sub> Sequestration in Saline Aquifer: Geochemical Modeling, Reactive Transport Simulation and Single-phase Flow Experiment |
| title_sort |
co<sub>2</sub> sequestration in saline aquifer: geochemical modeling, reactive transport simulation and single-phase flow experiment |
| publisher |
Case Western Reserve University School of Graduate Studies / OhioLINK |
| publishDate |
2006 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=case1124203454 |
| work_keys_str_mv |
AT zeraibiniam cosub2subsequestrationinsalineaquifergeochemicalmodelingreactivetransportsimulationandsinglephaseflowexperiment |
| _version_ |
1719421386056794112 |