Flue gas CO2 mineralization using thermally activated serpentine: From single- to double-step carbonation
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Author / Producer
Date
2014
Publication Type
Conference Paper
ETH Bibliography
yes
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Abstract
This communication explores the carbonation potential of activated serpentine at flue gas conditions. A first series of single-step batch experiments was performed varying the temperature and the slurry density to systematically assess the precipitation regime of the relevant Mg-carbonates and the fate of the Si species in solution. The results suggested that the reaction progress was hindered by a passivating layer of re-precipitated silica, quartz, or carbonates, as well as by equilibrium limitations. Among several strategies that were tested to overcome these limitations, a simple double-step process that is driven by a temperature swing in combination with a low-level CO2 pressure swing is presented. Exploratory experiments are shown that prove the viability of our process, first by applying a discontinuous method, and secondly by implementing a methodology to cycle the liquid phase continuously between a dissolution reactor and a precipitator. In this way, it was possible to produce highly pure Mg-carbonates that may serve various industries.
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Publication status
published
External links
Book title
12th International Conference on Greenhouse Gas Control Technologies, GHGT-12
Journal / series
Volume
63
Pages / Article No.
5912 - 5917
Publisher
Elsevier
Event
12th International Conference on Greenhouse Gas Control Technologies (GHGT-12)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
CO2 utilization; Mineralization; Capture integration; Activated serpentine; Double-step carbonation; Temperature-pressure-swing
Organisational unit
03484 - Mazzotti, Marco (emeritus) / Mazzotti, Marco (emeritus)