Dissolution Kinetics of Thermally Activated Serpentine for Mineralization at Flue Gas Conditions
OPEN ACCESS
Author / Producer
Date
2014
Publication Type
Conference Paper
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Abstract
This communication gives an overview of our study on the dissolution kinetics of thermally activated serpentine (dehydroxylated serpentine). Firstly, we had studied the far-from-equilibrium dissolution kinetics of 75% dehydroxylated lizardite particles in a liquid and gas flow-through reactor at moderate temperatures (30 °C < T < 120 °C) and low CO2 partial pressures (0.1 bar < pCO2 < 2 bar). Over 80% of the Mg was leached from the dehydroxylated lizardite particles. We then followed it up by developing a non-steady state dissolution kinetics model. The model uses surface complexation mechanisms to describe the specific dissolution rates. The model was able to describe the evolution of the non-stoichiometric aqueous concentration profiles of magnesium and silica accurately, taking into account the dynamic evolution of the reactor pH at non-steady state dissolution conditions. The kinetic parameters could be used to compare the dissolution performances of differently activated minerals in their application as potential feed materials for an ex situ mineral carbonation process.
Permanent link
Publication status
published
External links
Book title
12th International Conference on Greenhouse Gas Control Technologies, GHGT-12
Journal / series
Volume
63
Pages / Article No.
5887 - 5891
Publisher
Elsevier
Event
12th International Conference on Greenhouse Gas Control Technologies (GHGT-12)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Lizardite; Mineralization
Organisational unit
03484 - Mazzotti, Marco (emeritus) / Mazzotti, Marco (emeritus)