Dissolution of activated serpentine for direct flue-gas mineralization
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Author / Producer
Date
2013
Publication Type
Conference Paper
ETH Bibliography
yes
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Abstract
The dissolution of thermally activated serpentine (75% dehydroxylated) by direct flue-gas mineralization was investigated at far-from-equilibrium (w.r.t mineral dissolution) flow-through operating conditions. Experiments were performed at moderate partial pressures of CO2 (0.1 bar 2 bar CO2) and temperatures (30 °C 90 °C). Thermal activation enabled the dissolution of serpentine at mildly acidic conditions. Both magnesium and silica were released upon dissolution. However, the silica conversion was under-stoichiometric with respect to magnesium. Fast initial dissolution rates were observed with magnesium conversions reaching 60% in 30 min. Experiments were also performed in the absence of CO2 with identical pH conditions generated with mineral acid (HCl). The dissolution profiles were similar to those obtained under flue-gas atmosphere.
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Publication status
published
External links
Book title
GHGT-11 Proceedings of the 11th International Conference on Greenhouse Gas Control Technologies
Journal / series
Volume
37
Pages / Article No.
5938 - 5944
Publisher
Elsevier
Event
11th International Conference on Greenhouse Gas Control Technologies (GHGT-11)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Mineral carbonation; Flue-gas; Activated serpentine; Thermal activation; Dissolution
Organisational unit
03484 - Mazzotti, Marco (emeritus) / Mazzotti, Marco (emeritus)