Geological CO 2 storage: Reactive fluid transport: Pore-scale study

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Abstract

Carbon capture and geological sequestration (CCS) emerges as an important alternative to mitigate global warming. The injection of supercritical CO 2 triggers CO 2 dissolution, water acidification, mineral dissolution, and transport. We investigate reactive fluid transport at the pore- and rock-joint scales using published kinetic rate laws for dissolution reactions in calcite, CaCO 3 , and anorthite CaAl 2 Si 2O 8. Reactivity is coupled with Navier-Stokes law and advection-diffusion transport equations to numerically investigate the evolution of the pore geometry, flow patterns, and species concentrations in soil and rocks. Numerical results are analyzed in terms of two dimensionless numbers, the Damköhler and Peclet numbers. Observed trends provide insight into the interplay among flow parameters including advection, diffusion, chemical reactions, and the evolution of the porous network in different transport-reaction regimes relevant to CO 2 injection and geological storage.

Original languageEnglish (US)
Title of host publicationGeo-Congress 2014 Technical Papers
Subtitle of host publicationGeo-Characterization and Modeling for Sustainability - Proceedings of the 2014 Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages2695-2704
Number of pages10
Edition234 GSP
ISBN (Print)9780784413272
DOIs
StatePublished - Jan 1 2014
Event2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014 - Atlanta, GA, United States
Duration: Feb 23 2014Feb 26 2014

Publication series

NameGeotechnical Special Publication
Number234 GSP
ISSN (Print)0895-0563

Other

Other2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014
CountryUnited States
CityAtlanta, GA
Period02/23/1402/26/14

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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