Speaker
Description
Understanding CO₂ mineralization at the pore scale is essential for advancing carbon capture and storage (CCS) technologies and addressing global climate change. Evaporite layers, predominantly composed of minerals like gypsum and sodium chloride, are often associated with key CO₂ reservoirs, such as mafic and ultramafic rocks. Understanding how pore structures evolve during carbon mineralization within these layers is critical for assessing changes in their permeability and mechanical properties. This study employs the 3D pore-scale reactive transport simulator, LBM3RT-3D, to investigate the effects of gypsum carbonation on pore geometry. Results reveal that while gypsum-to-calcite conversion involves a negative volume effect, maximum calcite precipitation occurs primarily in dead-end pores adjacent to fractures. This phenomenon can significantly reduce the cross-sectional area of the dead-end pores. Sensitivity analyses were conducted on factors such as pH of the injected solution, solute concentration, pore size, flow rate, dissolution/precipitation rates, and temperature. Among these, pH, solute concentration, and flow rate significantly influence the distribution of calcite precipitation in dead-end pores. These findings enhance understanding of gypsum's role in carbon mineralization and provide insights for future industrial applications.
| Country | US |
|---|---|
| Water & Porous Media Focused Abstracts | This abstract is related to Water |
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