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Measurement and modeling of CO2 mass transfer in brine at reservoir conditions
•Measurements/modeling of CO2 mass transfer in brine/water saturated porous media.•Demonstration of potential impact of natural convection on mass transfer rates.•Agreement between experimental observations and high-resolution simulation. In this work, we combine measurements and modeling to investi...
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Published in: | Advances in water resources 2018-03, Vol.113 (C), p.100-111 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •Measurements/modeling of CO2 mass transfer in brine/water saturated porous media.•Demonstration of potential impact of natural convection on mass transfer rates.•Agreement between experimental observations and high-resolution simulation.
In this work, we combine measurements and modeling to investigate the application of pressure-decay experiments towards delineation and interpretation of CO2 solubility, uptake and mass transfer in water/brine systems at elevated pressures of relevance to CO2 storage operations in saline aquifers. Accurate measurements and modeling of mass transfer in this context are crucial to an improved understanding of the longer-term fate of CO2 that is injected into the subsurface for storage purposes. Pressure-decay experiments are presented for CO2/water and CO2/brine systems with and without the presence of unconsolidated porous media. We demonstrate, via high-resolution numerical calculations in 2-D, that natural convection will complicate the interpretation of the experimental observations if the particle size is not sufficiently small. In such settings, we demonstrate that simple 1-D interpretations can result in an overestimation of the uptake (diffusivity) by two orders of magnitude. Furthermore, we demonstrate that high-resolution numerical calculations agree well with the experimental observations for settings where natural convection contributes substantially to the overall mass transfer process. |
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ISSN: | 0309-1708 1872-9657 |
DOI: | 10.1016/j.advwatres.2017.11.002 |