Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Georgakopoulos, Evangelos; Chiang, Yi Wai; Manović, Vasilije

doi:10.3791/55062

Cited by 2 publications

(2 citation statements)

References 38 publications

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“…To calculate the HCl mass, use the Equation (19), where V HCl is the volume of HCl used (15,000 mL), and ρ HCl is the density of 6 M HCl (1.0939 g/mL):…”

Section: Co 2 Content In Fresh and Carbonated Wollastonitementioning

confidence: 99%

“…Mineral carbonation is the reaction between CO 2 and alkaline minerals (i.e., those that contain alkaline earth elements) that produce geologically stable carbonate minerals, such as calcite (CaCO 3 ), dolomite (CaMg(CO 3 ) 2 ), magnesite (MgCO 3 ), and, in some cases, even siderite (FeCO 3 ) [12,13]. Alkaline minerals come in different varieties: they include mafic and ultramafic igneous rocks, such as basalt, wollastonite, olivine, and serpentine, but also solid residues from the steelmaking industry, waste incineration, and building demolition, such as slags, ashes, or asbestos [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Mineral Carbonation as an Educational Investigation of Green Chemical Engineering Design

Fantucci

Sidhu

2019

Sustainability

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Engaging students in the experimental design of “green” technology is a challenge in Chemical Engineering undergraduate programs. This concept paper demonstrates an educational methodology to investigate accelerated mineral carbonation, which is a promising technology related to mitigation of climate change by sequestering carbon dioxide (CO2) from industrial sources as stable solid carbonates. An experimental investigation is conceived, whereby students test the effect of two process parameters (CO2 pressure and mixing rate) on the extent of carbonation reaction. The carbonation reaction has been performed using a mineral called wollastonite (CaSiO3). The experimental study and laboratory report cover principles of reaction kinetics and mass transfer, while illustrating the steps to develop and investigate a green process technology. The results from the experimental investigation, which is carried out by multiple teams of students, are then pooled and used to guide a subsequent design project. Students would conceive a flowsheet, size equipment, and estimate the energy demand and net CO2 sequestration efficiency of a full-scale implementation of the mineral carbonation technology. This educational investigation aims to help undergraduate students to acquire deeper experiential learning and greater awareness of future green technologies by applying fundamental engineering principles into an engaging experimental and design exercise.

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“…To calculate the HCl mass, use the Equation (19), where V HCl is the volume of HCl used (15,000 mL), and ρ HCl is the density of 6 M HCl (1.0939 g/mL):…”

Section: Co 2 Content In Fresh and Carbonated Wollastonitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mineral Carbonation as an Educational Investigation of Green Chemical Engineering Design

Fantucci

Sidhu

2019

Sustainability

Self Cite

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Accelerated Weathering and Carbonation (Mild to Intensified) of Natural Canadian Silicates (Kimberlite and Wollastonite) for CO2 Sequestration

2021

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Canada’s mineral reserves can play a very important role in curbing climate change if natural alkaline minerals are used for the process of mineral carbonation. In this work, the potential of using two Canadian natural silicates for accelerated carbonation is experimentally assessed: kimberlite mine tailing (Mg0.846Al0.165Fe0.147Ca0.067SiO3.381) from the Northwest Territories, and mined wollastonite ore (Ca0.609Mg0.132Al0.091Fe0.024SiO2.914) from Ontario. The aim of this work was to evaluate the weathering reactivity and CO2 uptake capacity via carbonation of these two comminuted rocks, both of which are made up of a mixture of alkaline minerals, under process conditions that spanned from milder to intensified. Research questions addressed include: does kimberlite contain a sufficient amount of reactive minerals to act as an effective carbon sink; is dehydroxylation necessary to activate kimberlite, and to what extent does it do this; do secondary phases of wollastonite hinder its reactivity; and can either of these minerals be carbonated without pH buffering, or only weathered? Incubator, slurry, and pressurized slurry methods of accelerated weathering and carbonation were used, and the effect of the process parameters (temperature, solid-to-liquid ration, reaction time, CO2 level, pH buffer) on the CO2 uptake and crystalline carbonates formation is tested. The reacted samples were analyzed by pH test, loss-on-ignition test, calcimeter test, and X-ray diffraction analysis. Results showed that wollastonite ore (rich in fast-weathering CaSiO3) is more suitable for accelerated carbonation than kimberlite tailing (containing slow-weathering hydrated magnesium silicates and aluminosilicates) when only its capability to rapidly form solid carbonates is considered. Incubator and pressurized buffered slurry methods proved to be most effective as under these conditions the precipitation of carbonates was more favorable, while the unbuffered slurry reaction conditions were more akin to accelerated weathering rather than accelerated carbonation.

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Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Cited by 2 publications

References 38 publications

Mineral Carbonation as an Educational Investigation of Green Chemical Engineering Design

Mineral Carbonation as an Educational Investigation of Green Chemical Engineering Design

Accelerated Weathering and Carbonation (Mild to Intensified) of Natural Canadian Silicates (Kimberlite and Wollastonite) for CO2 Sequestration

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