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type     January, 2009

Modeling the effects of topography and wind on atmospheric dispersion of CO2 surface leakage at geologic carbon sequestration sites.

Fotini K. Chow, Patrick W. Granvold, Curtis M. Oldenburg

Understanding the potential impacts of unexpected surface releases of CO2 is an essential part of risk assessment for geologic carbon sequestration sites. We have extended a mesoscale atmospheric model to model dense gas dispersion of CO2 leakage. The hazard from CO2 leakage is greatest in regions with topographic depressions where the dense gas can pool. Simulation of dispersion in idealized topographies shows that CO2 can persist even under high winds. Simulation of a variety of topographies, winds, and release conditions allows the generation of a catalog of simulation results that can be queried to estimate potential impacts at actual geologic carbon sequestration sites.

© 2008 Elsevier Ltd. All rights reserved.

Keywords: atmospheric dispersion, dense gas, leakage and seepage, carbon sequestration.

Source: Greenhouse Gas Control Technologies (GHGT) conference, 16-20 November 2008

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