<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si5.gif" display="inline" overflow="scroll"><mml:msub><mml:mrow><mml:mi>CO</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>mineral sequestration: physically activated dissolution of serpentine and pH swing process

Park, Ah‐Hyung Alissa; Fan, Liang‐Shih

doi:10.1016/j.ces.2004.09.008

Cited by 382 publications

(193 citation statements)

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“…Further, the rates of mineral dissolution based the concentration of Si is noticeably lower than that based on Mg (Table 5), collectively indicating preferential release of Mg to the solution. This can be explained by the different reactivity of octahedral (Mg) and tetrahedral (Si) sheets in serpentine minerals, and favoured dissolution of the octahedral brucite sheet at low pH conditions (Park and Fan, 2004). The incongruent dissolution of serpentine minerals in the presence of NH 4 HSO 4 resulted in siliceous residuum, i.e.…”

Section: The Rate Of Serpentine Dissolutionmentioning

confidence: 99%

“…Currently, two CCSM approaches are being considered: (i) in situ -whereby the CO 2 is injected underground into a suitable host-rock where it reacts to form carbonate [Kelemen and Matter, 2008;Kelemen et al, 2011;Matter and Kelemen, 2009;McGrail et al, 2014;McGrail et al, 2006;Schaef et al, 2011]; and (ii) ex situ, which involves carbonation of feedstock materials above-ground in a specifically designed CCSM plant [Fagerlund et al, 2009;Lackner et al, 1997;Larachi et al, 2012;Park and Fan, 2004;Sanna et al, 2014;Sanna et al, 2013;Wang and Maroto-Valer, 2011a;b;Werner et al, 2013]. Both host-rock for injection and feedstock materials must be widely available and contain large proportions of easily-extractable cations (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

et al. 2016

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Serpentine minerals serve as a Mg donor in carbon capture and storage by mineralisation (CCSM).The acid-treatment of nine comprehensively-examined serpentine polymorphs and polytypes, and the subsequent microanalysis of their post-test residues highlighted several aspects of great importance to the choice of the optimal feed material for CCSM. Compelling evidence for the nonuniformity of serpentine mineral performance was revealed, and the following order of increasing Mg extraction efficiency after three hours of acid-leaching was established: Al-bearing polygonal serpentine (<5%) ≤ Al-bearing lizardite 1T (≈5%) < antigorite (24-29%) < well-ordered lizardite 2H 1 (≈65%) ≤ Al-poor lizardite 1T (≈68%) < chrysotile (≈70%) < poorly-ordered lizardite 2H 1 (≈80%) < nanotubular chrysotile (≈85%).It was recognised that the Mg extraction efficiency of the minerals depended greatly on the intrinsic properties of crystal structure, chemistry and rock microtexture. On this basis, antigorite and Albearing well-ordered lizardite were rejected as potential feedstock material whereas any chrysotile, non-aluminous, widely spaced lizardite and/or disordered serpentine were recommended.The formation of peripheral siliceous layers, tens of microns thick, was not universal and depended greatly upon the intrinsic microtexture of the leached particles. This study provides the first comprehensive investigation of nine, carefully-selected serpentine minerals, covering most varieties and polytypes, under the same experimental conditions. We focused on material characterisation and the identification of the intrinsic properties of the minerals that affect particle's reactivity. It can therefore serve as a generic basis for any acid-based CCSM pre-treatment.

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Section: The Rate Of Serpentine Dissolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

et al. 2016

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“…Various studies have addressed methods to speed up the kinetics of direct aqueous carbonation including physical and chemical pretreatment (Maroto-Valer et al, 2005a, b), electrolysis and heat pretreatment , and mechanical activation methods (McKelvy et al, 2004;Park and Fan, 2004;Haug et al, 2010;Haug et al, 2011). O'Connor et al (2002) investigated approaches to reduce particle size, and increase surface area, and elevate process temperature and pressure by thermal treatment or steam activation.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…According to a report by Park and Fan (2004), the optimum pH for aqueous carbonation is around 10, while the dissolution of BOF slag occurs under low pH conditions. The pH decreases continuously as carbonation proceeds due to CO 2 dissolution into solution (Santos et al, 2009).…”

Section: Performance Evaluationmentioning

confidence: 99%

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

Pan

Chang

Chiang

2012

Aerosol Air Qual. Res.

319

180

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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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Particle Technology

Park¹,

Zhu²,

Fan³

et al. 2019

Kirk-Othmer Encyclopedia of Chemical Technology

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Particulate systems are involved in numerous industrial processes and are present in various natural phenomena. Particle technology is a term that refers to the field of the science and technology associated with the characterization, formation, processing, and utilization of particles. It is concerned with the systems in which one or more of the components are in the form of particles. Recently, the scope of particle technology has been extended to cover systems containing nanoparticles, aerosols, liquid droplets, emulsions, and bubbles. Particle technology is an interdisciplinary field. Owing to the complexity of particulate systems, particle technology is often treated as art than science. Hence, efforts in synthesizing, measuring, modeling, and developing particle and particulate systems are being pursued actively in both academia and industry. This article describes the fundamental principles governing the key aspects of particle science and technology.

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CO2mineral sequestration: physically activated dissolution of serpentine and pH swing process

Cited by 382 publications

References 3 publications

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

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

Particle Technology

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