Dissolution of dehydroxylated lizardite at flue gas conditions: II. Kinetic modeling

Hariharan, Subrahmaniam; Werner, Mischa; Hänchen, Markus; Mazzotti, Marco

doi:10.1016/j.cej.2013.12.056

Cited by 26 publications

(31 citation statements)

References 35 publications

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“…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).…”

Section: Ex-situ Carbon Mineralizationmentioning

confidence: 99%

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

et al. 2019

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Section: Ex-situ Carbon Mineralizationmentioning

confidence: 99%

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

et al. 2019

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“…The influence of pH, c Mg , and c Si on the dissolution rate of a silicate species can be described through its specific dissolution rate. The specific dissolution rates, r j , for the different silicate species ( j = 1, 2, 3), considered in our earlier work were descriptive of their far-from-equilibrium kinetics and in mildly acidic solutions [2]. In the following, we will update the expressions of r j for each silicate species.…”

Section: Specific Dissolution Ratesmentioning

confidence: 99%

“…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 ). In the second part of the series, we had developed a kinetic model for the dissolution of these particles at far-from-equilibrium conditions [2]. Two different structures of the PDL particles, namely the homogeneous and the heterogeneous particle structures, were considered in the modeling study.…”

Section: Introductionmentioning

confidence: 99%

“…But before trying to understand the consequences of the precipitation of secondary phases during CO 2 mineralization, it is very important to have an accurate knowledge of the dissolution kinetics in the absence of secondary phases. This publication will build upon the far-from-equilibrium modeling work described in Hariharan et al [2] in order to accommodate the effects of phenomena 1 to 3 listed above. We will first update the specific dissolution rates, r j , for the dissolution of the different silicate species at near-equilibrium solution compositions.…”

Section: Introductionmentioning

confidence: 99%

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

Hariharan

Repmann-Werner

Mazzotti

2016

Chemical Engineering Journal

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The near-equilibrium dissolution kinetics of partially dehydroxylated lizardite was investigated at conditions relevant for ex-situ CO 2 mineralization, namely 30 • C ≤ T ≤ 90 • C and pCO 2 < 1 atm. Batch experiments were carefully designed to explore a wide range of operating conditions without precipitating any secondary phases, namely amorphous silica or magnesium carbonates. The operational range included solutions whose compositions were very close to solubility of the dissolving silicate species. Expressions for specific dissolution rates were developed in order to describe the experimentally measured near-equilibrium, non-steady state dissolution profiles. The near-equilibrium kinetic model was able to describe the evolution of the concentration profiles of Mg(aq) and SiO 2 (aq) with good accuracy. A small enhancement in the dissolution rates of forsteritic silicate was observed in the presence of high concentrations of bicarbonate ions. The presence of Mg 2+ ions and SiO 2 (aq) in the solution were found to affect the specific dissolution rates of the different silicate species present in dehydroxylated lizardite.

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“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Hitch

2015

Minerals

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This paper investigates the potential of pristine and acid-treated olivine as a substrate for CO2 capture using a vacuum swing adsorption (VSA) process from the gas-solid phase. The experiments tested the isotherm of pure CO2 adsorption with partial pressure from 10 −5 to 1 bar at ambient temperature. The CO2 adsorption capacity and actual expected working capacity (EWC) curves of pristine and acid-treated olivine were determined. Isotherm studies predict that physisorption dominates chemisorptions at ambient temperatures. The adsorption capacity enhances with the increase of specific surface area, pore volume, and the appearance of Mg complexed on the mineral's surface. Actual EWC studies showed that acid-treated olivine is an adsorbent choice for the VSA process, due to enhanced CO2 adsorption capacities compared to olivine and the potential for 100% recovery of CO2 during the regeneration process. Pristine olivine is not suitable for the VSA process because of bad regenerability, but it can be used in capturing and sequestering dilute CO2 in process streams. Our research reveals excellent viability for the application of VSA in the area of CO2 capture using pristine olivine and acid-treated olivine.

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Dissolution of dehydroxylated lizardite at flue gas conditions: II. Kinetic modeling

Cited by 26 publications

References 35 publications

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

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

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

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

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