Water Reactivity in the Liquid and Supercritical CO2 Phase: Has Half the Story Been Neglected?

Journal Article · Sun Feb 01 04:00:00 EST 2009 · Energy Procedia, 1(1):3415-3419

DOI:https://doi.org/10.1016/j.egypro.2009.02.131· OSTI ID:982310

McGrail, B Peter; Schaef, Herbert T; Glezakou, Vassiliki Alexandra; Dang, Liem X; Owen, Antionette T

Aqueous-phase mediated chemical reactions with dissolved CO2 have long been considered the principal if not only reactive process supporting mineralization reactions with basalt and other reactive reservoir rocks and caprocks in deep geologic sequestration systems. This is not surprising given the quite high solubility of CO2 in the aqueous phase and ample evidence from natural systems of the reactivity of CO2-charged waters with a variety of silicate minerals. In contrast, comparatively scant attention has been directed at reactivity of water solvated in liquid and supercritical CO2, with the exception of interest in the impacts of water in CO2 on the corrosion of pipeline steels. The results presented in this paper show that the most interesting and important aspects of water reactivity with metal and oxide surfaces of interest in geologic sequestration systems actually occurs in the liquid or supercritical CO2 phase. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 982310
• Report Number(s): PNNL-SA-68583; AA3010000
• Journal Information: Energy Procedia, 1(1):3415-3419, Journal Name: Energy Procedia, 1(1):3415-3419 Journal Issue: 1 Vol. 1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
BASALT
CHEMICAL REACTIONS
CORROSION
ENERGY
EXCEPTIONS
LIQUIDS
METALS
MINERALIZATION
OXIDES
PIPELINES
REACTIVITY
RESERVOIR ROCK
SILICATE MINERALS
SOLUBILITY
STEELS
SURFACES
WATER
carbonate precipitation
corrosion
molecular dynamics
sequestration