Roles of Transport Limitations and Mineral Heterogeneity in Carbonation of Fractured Basalts
| Autor: | Daniel E. Giammar, Brian R. Ellis, Peiyuan Li, Anne H. Menefee |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Basalt
Minerals Mineral Silicates Diffusion Carbonation Carbonates Mineralogy General Chemistry Carbon Dioxide 010501 environmental sciences 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound Carbon storage Flow conditions chemistry Environmental Chemistry Carbonate Dissolution Geology 0105 earth and related environmental sciences |
| Zdroj: | Environmental Science & Technology. 51:9352-9362 |
| ISSN: | 1520-5851 0013-936X |
| Popis: | Basalt formations could enable secure long-term carbon storage by trapping injected CO2 as stable carbonates. Here, a predictive modeling framework was designed to evaluate the roles of transport limitations and mineral spatial distributions on mineral dissolution and carbonation reactions in fractured basalts exposed to CO2-acidified fluids. Reactive transport models were developed in CrunchTope based on data from high-temperature, high-pressure flow-through experiments. Models isolating the effect of transport compared nine flow conditions under the same mineralogy. Heterogeneities were incorporated by segmenting an actual reacted basalt sample, and these results were compared to equivalent flow conditions through randomly generated mineral distributions with the same bulk composition. While pure advective flow with shorter retention times promotes rapid initial carbonation, pure diffusion sustains mineral reactions for longer time frames and generates greater net carbonate volumes. For the same transpo... |
| Databáze: | OpenAIRE |
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