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Mapping magnesium fate in chemically activated olivine for CO₂ mineralization: Decoupling surface area from carbonation efficiency
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DOI：10.1016/j.jcou.2026.103541.png)
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Abstract
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• Olivine pretreatments decouple surface area from CO2 uptake. • Acid-washed residues show high porosity but low solid carbonation. • Oxalic acid traps Mg as glushinskite; citrate/ascorbate mobilize Mg. • Na2SiO3 retains Mg and alkalinity in a modified solid interface. • Na2SiO3-treated olivine reaches 39.5% CO2 uptake efficiency.
Keywords:
CO₂ mineralization
Olivine carbonation
Silica passivation
Alkaline silicates
Surface area-reactivity decoupling
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