Abstract
A comprehensive experimental approach has been used to assess the interrelation of CO2-mediated chemical reactions and transport properties in pelitic rocks. Sorption values on shale samples (P<20 MPa, 50 {ring operator}C) were high with maximum amounts of ∼44 kg/t. These capacities did not correlate with the organic carbon content, indicating sorption on and/or reaction with mineral components. Further, crushed shale samples were exposed to CO2 in the presence of water at 15 MPa and 50 {ring operator}C for different time periods, showing significant changes in mineral composition. Reaction equilibrium was reached within periods of less than a month. Some of the caprock lithotypes could represent a significant sink for CO2 deposited in the subsurface and could reduce the risk of leakage to the surface.
Original language | English |
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Pages (from-to) | 3229-3235 |
Number of pages | 7 |
Journal | Energy Procedia |
Volume | 1 |
Issue number | 1 |
DOIs | |
Publication status | Published - Feb 2009 |
Keywords
- Caprock integrity
- Clay minerals
- CO diffusion
- CO sorption
- Mineral reaction
- Muderong Shale
ASJC Scopus subject areas
- General Energy