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Nanoscale surface observation of feldspar dissolved under supercritical CO2–water–mineral system

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  • Sorai, Masao
  • Ohsumi, Takashi
  • Ishikawa, Masamichi

Abstract

As part of our assessment program on underground CO2 storage, we studied the dissolution of feldspar in aqueous solutions of supercritical CO2 at 25, 50, 65, and 80°C with a constant CO2 pressure of 10MPa. Atomic force microscopy (AFM) was then used to observe nanoscale dissolution features on the feldspar surface. The average dissolution rates of anorthite during the initial 1 week of dissolution were estimated from surface retreat based on vertical cross-section profiles.

Suggested Citation

  • Sorai, Masao & Ohsumi, Takashi & Ishikawa, Masamichi, 2005. "Nanoscale surface observation of feldspar dissolved under supercritical CO2–water–mineral system," Energy, Elsevier, vol. 30(11), pages 2334-2343.
    • Handle: RePEc:eee:energy:v:30:y:2005:i:11:p:2334-2343
    DOI: 10.1016/j.energy.2003.10.024
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