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• W3120921339 endingPage "103847" @default.
• W3120921339 startingPage "103847" @default.
• W3120921339 abstract "We develop a reactive transport model for dissolution of porous materials using a Continuous Time Random Walk (CTRW) formulation with first-order kinetics. Our model is validated with a dataset for a Ketton carbonate rock sample undergoing dissolution on injection of an acid, monitored using Nuclear Magnetic Resonance (NMR). The experimental data includes the 3D porosity distribution at the beginning and end of the experiment, 1D porosity profiles along the direction of flow during dissolution, as well as the molecular fluid displacement probability distributions (propagators). With the calibration of only a single parameter, we successfully predict the porosity changes and the propagators as a signature of flow heterogeneity evolution in the dissolution experiment. We also demonstrate that heterogeneity in the flow field leads to an effective reaction rate, limited by transport of reactants, that is almost three orders of magnitude lower than measured under batch reaction conditions. The effective reaction rate predicted by the model is in good agreement with the experimentally measured rate. Furthermore, as dissolution proceeds, the formation of channels in the rock focused the flow in a few fast-flowing regions. The predicted dissolution patterns are similar to those observed experimentally. This study establishes a workflow to calibrate and validate the CTRW reactive transport model with NMR experiments." @default.
• W3120921339 created "2021-01-18" @default.
• W3120921339 creator A5037269256 @default.
• W3120921339 creator A5043276202 @default.
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• W3120921339 creator A5081049121 @default.
• W3120921339 creator A5082597658 @default.
• W3120921339 creator A5085590730 @default.
• W3120921339 date "2021-03-01" @default.
• W3120921339 modified "2023-09-26" @default.
• W3120921339 title "A continuous time random walk method to predict dissolution in porous media based on validation of experimental NMR data" @default.
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• W3120921339 doi "https://doi.org/10.1016/j.advwatres.2021.103847" @default.
• W3120921339 hasPublicationYear "2021" @default.

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