Dissolution of dehydroxylated lizardite at flue gas conditions: I. Experimental study

Dissolution of dehydroxylated lizardite at flue gas conditions: III. Near-equilibrium kinetics

“…Through this publication series, we have conducted a systematic and thorough investigation of the dissolution kinetics of partially dehydroxylated lizardite particles. In order to understand the complex dissolution profiles exhibited by these dehydroxylated particles, which have nonhomogeneous physical morphologies and chemical properties [1,2], it became necessary to study their dissolution kinetics at a wide range of operating conditions. Since the overall objective of this research program is to develop an industrial CO 2 mineralization process, kinetic models that account for time varying reactive surface areas have been developed that have allowed us to describe the non-steady state dissolution profiles.…”

“…It was therefore sieved to a narrower and well-defined 20 -63 μm particle size fraction. Detailed characterization of both these particle size fractions are reported elsewhere [1,3]. Gas bottles of pure CO 2 (grade 4.5), calibrated gas mixtures of 50 mol%, 10 mol%, and 2.5 mol% CO 2 in N 2 (±2% relative error, Pangas AG, Switzerland) were used to obtain different gas phase compositions for the dissolution experiments.…”

“…In this third part of the publication series, we report the experimental results and modeling analysis for the dissolution of partially (75%) dehydroxylated lizardite (PDL) particles under flue gas atmosphere (CO 2 partial pressure, pCO 2 , below 1 atm), at low temperatures (30 • C ≤ T ≤ 90 • C), and at near-equilibrium solution compositions. In the first part of this series, we had reported the experimental results for the dissolution of these particles at far-from-equilibrium conditions under flue gas atmosphere [1]. Experiments were performed in a flow-through reactor at operating conditions that ensured low concentrations of Mg(aq) (c Mg ) and SiO 2 (aq) (c Si ).…”

An Overview of the Status and Challenges of CO2 Storage in Minerals and Geological Formations

“…The optimum temperature for carbon mineralization of olivine is ∼185 • C (O'Connor et al, 2005;Gadikota et al, 2014). Serpentine-rich mine tailings are an intriguing option as the carbonation of asbestiform chrysotile would mitigate health and environmental hazards, and products of rapid heat-treatment of serpentine-rich mine tailings could be used as a feedstock for carbon mineralization using concentrated sources of CO 2 (McKelvy et al, 2004;Maroto-Valer et al, 2005;O'Connor et al, 2005;Li et al, 2009;Larachi et al, 2010Larachi et al, , 2012Balucan et al, 2011;Fedoročková et al, 2012;Balucan and Dlugogorski, 2013;Werner et al, 2013Werner et al, , 2014Dlugogorski and Balucan, 2014;Ghoorah et al, 2014;Hariharan et al, 2014Hariharan et al, , 2016Pasquier et al, 2014;Sanna et al, 2014;Hariharan and Mazzotti, 2017). However, these ex-situ methods are more expensive than the projected cost of direct air capture of CO 2 , and significantly more expensive than CO 2 storage in subsurface pore space (see section Costs and Reservoir Capacities).…”

Carbon Dioxide Sorption Isotherm Study on Pristine and Acid-Treated Olivine and Its Application in the Vacuum Swing Adsorption Process

“…CCS generally involves CO2 separation from the flue gas of power plants or natural gases, and then storage in geological reservoirs. In recent years, research interests have come to integrate CO2 capture with CO2 sequestration [3][4][5][6][7]. In all CO2 sequestration methods, CO2 mineral sequestration can guarantee the permanent and environmentally-friendly storage of CO2 [8].…”