Development of a CO2 Sequestration Module by Integrating Mineral Activation and Aqueous Carbonation

Alexander, George; Aksoy, Parvana; Andrésen, John M.; Maroto‐Valer, M. Mercedes; Schobert, Harold H.

doi:10.2172/923719

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…Based on a report by Alexander et al (2005), the effects of increased reaction temperature from 25°C to 50°C provided a 70% improvement on dissolution of the primary phase. Iizuka et al (2004) proposed a new CO 2 sequestration process using carbonation of waste cement, which indicated that calcium extraction increased with pressure.…”

Section: Reaction Kinetics Leaching Of Metallic Ions From Solid Matrixmentioning

confidence: 99%

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

Pan

Chang

Chiang

2012

Aerosol Air Qual. Res.

358

193

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CO 2 capture, utilization, and storage (CCUS) is a promising technology wherein CO 2 is captured and stored in solid form for further utilization instead of being released into the atmosphere in high concentrations. Under this framework, a new process called accelerated carbonation has been widely researched and developed. In this process, alkaline materials are reacted with high-purity CO 2 in the presence of moisture to accelerate the reaction to a timescale of a few minutes or hours. The feedstock for accelerated carbonation includes natural silicate-minerals (e.g., wollastonite, serpentine, and olivine) and industrial residues (e.g., steelmaking slag, municipal solid waste incinerator (MSWI) ash, and air pollution control (APC) residues). This research article focuses on carbonation technologies that use industrial alkaline wastes, such as steelmaking slags and metalworking wastewater. The carbonation of alkaline solid waste has been shown to be an effective way to capture CO 2 and to eliminate the contents of Ca(OH) 2 in solid residues, thus improving the durability of concrete blended with the carbonated residues. However, the operating conditions must be further studied for both the economic viability of the technology and the optimal conditions for CO 2 reaction.

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Section: Reaction Kinetics Leaching Of Metallic Ions From Solid Matrixmentioning

confidence: 99%

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

Pan

Chang

Chiang

2012

Aerosol Air Qual. Res.

358

193

View full text Add to dashboard Cite

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“…In most curriculum, the release of Mg ions from steel slag was quite low compared to Ca release (Chang et al, 2012a). Several factors could increase the leaching concentration of calcium ions from the solid matrix (Park et al, 2003;Iizuka et al, 2004;Alexander et al, 2005): (i) high porosity and fine particle size of alkaline solid wastes; (ii) high temperature and low pH value in solution; and (iii) sufficient mixing between the solid and liquid phases to avoid severe agglomeration. The leaching of calcium ions is probably determined by the diffusion through the Cadepleted silicate rim inside the solid matrix (O'Connor et al, 2002;Santos et al, 2009), rather than by the surface reaction at the phase boundary (i.e., the solid-liquid interface) which usually is the rate-limiting step in the beginning of aqueous carbonation.…”

Section: Leaching Kineticsmentioning

confidence: 99%

An Overview: Reaction Mechanisms and Modelling of CO2 Utilization via Mineralization

Pan

Ling

Park

et al. 2018

Aerosol Air Qual. Res.

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Accelerated carbonation using alkaline solid wastes has been considered an effective approach to mineralizing flue gas CO 2 from industries or power plants. Despite its recent progress, mechanistic understanding and modelling at interface levels are still needed to control the reactivity and equilibrium of the reaction system. This review focuses on several phenomenological models for accelerated carbonation that look at the solid-fluid interface. We first illustrate the principles of kinetic and mass transfer driven reactions for CO 2 -mineral-water systems. Then, we provide an overview into the reaction mechanisms and modelling for CO 2 mineralization including leaching-precipitation model, shrinking core model and surface coverage model. Advanced models considering multiple mechanisms, such as two-layer diffusion model, are also discussed. Finally, the perspectives and prospects are provided to shine a light on future directions, including incorporation of structural and physical properties in phenomenological models, identification of dynamic speciation by in-situ high-resolution equipment, and integration of heat transfer in reaction modelling for system optimization.

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Development of a CO2 Sequestration Module by Integrating Mineral Activation and Aqueous Carbonation

Cited by 2 publications

References 23 publications

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications

An Overview: Reaction Mechanisms and Modelling of CO2 Utilization via Mineralization

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