The CO2 -binding by Ca-Mg-silicates in direct aqueous carbonation of oil shale ash and steel slag

Uibu, Mai; Kuusik, Rein; Andreas, Lale; Kirsimäe, Kalle

doi:10.1016/j.egypro.2011.01.138

Cited by 79 publications

(40 citation statements)

References 19 publications

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“…For instance, the calcium-silicatehydrates (C-S-H) can react with CO 2 , and produce CaCO 3 and a silica gel (Thiery et al, 2007;Tsuyoshi et al, 2010). Uibu et al (2011) found that Ca 2 SiO 4 and Ca 3 Mg(SiO 4 ) 2 were the main CO 2 binding components in electric arc furnace (EAF) slag according to quantitative XRD analysis, and the main product was calcite. A similar conclusion was made by Fernández-Bertos et al (2004a), which indicated that C-S-H becomes rapidly activated by CO 2 where carbonation is accomplished by hydration at first and is followed, after some delay, by secondary carbonation as shown in Eq.…”

Section: Process Chemistrymentioning

confidence: 99%

“…One way to avoid some of these drawbacks is to utilize alkaline waste residues. Table 2 summarizes the example of industrial alkaline solid wastes, e.g., coal-and oil shale-fired power plants (Uibu et al, 2009b;Uibu and Kuusik, 2009a;Uibu et al, 2011), steelmaking slag (Huijgen et al, 2005c;Bonenfant et al, 2008; Huijgen et al, 2005c;Bonenfant et al, 2008;Eloneva et al, 2008b;Kodama et al, 2008;Baciocchi et al, 2009b;Doucet, 2010;Chang et al, 2011a, b Air pollution control (APC) residue Khaitan et al, 2009;Yadav et al, 2010 Sludge (incinerator) ash Sewage sludge incinerator ash (SSA) Steel wastewater sludge (SWS) Paper sludge incinerator ash (PSIA) Gunning et al, 2010 Paper pulping and mill waste…”

Section: Alkaline Wastes As Adsorbentsmentioning

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.

349

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: Process Chemistrymentioning

confidence: 99%

Section: Alkaline Wastes As Adsorbentsmentioning

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.

349

193

View full text Add to dashboard Cite

show abstract

“…Steel manufacturing plants are the typical examples of industrial sites in which relevant flows of both CO2 and alkaline industrial residues are generated and therefore represent one of the potentially most interesting contexts for the application of accelerated carbonation. Several studies have shown that a number of different types of steel slag present a significant reactivity with CO2, allowing to achieve, for specific process routes and operating conditions, relevant CO2 uptakes (Huijgen et al, 2005;Baciocchi et al, 2010Baciocchi et al, , 2015Uibu et al, 2011;Chang et al, 2012;Santos et al, 2013a,b). Furthermore, several types of residues generated in steel manufacturing plants, such as Basic Oxygen Furnace (BOF), Electric Arc Furnace (EAF), and argon oxygen decarburization (AOD) slag, are typically not valorized and generally landfilled, or employed only for low-end applications, owing for their significant content of free calcium and magnesium (hydr)oxides that may result in poor volumetric stability and hence in a low technical performance in construction applications (Morone et al, 2014).…”

mentioning

confidence: 99%

Accelerated Carbonation of Steel Slags Using CO2 Diluted Sources: CO2 Uptakes and Energy Requirements

et al. 2016

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This work presents the results of carbonation experiments performed on Basic Oxygen Furnace (BOF) steel slag samples employing gas mixtures containing 40 and 10% CO2 vol. simulating the gaseous effluents of gasification and combustion processes respectively, as well as 100% CO2 for comparison purposes. Two routes were tested, the slurry-phase (L/S = 5 l/kg, T = 100°C and Ptot = 10 bar) and the thin-film (L/S = 0.3-0.4 l kg, T = 50°C and Ptot = 7-10 bar) routes. For each one, the CO2 uptake achieved as a function of the reaction time was analyzed and on this basis, the energy requirements associated with each carbonation route and gas mixture composition were estimated considering to store the CO2 emissions of a medium size natural gas fired power plant (20 MW). For the slurry-phase route, maximum CO2 uptakes ranged from around 8% at 10% CO2, to 21.1% (BOF-a) and 29.2% (BOF-b) at 40% CO2 and 32.5% (BOF-a) and 40.3% (BOF-b) at 100% CO2. For the thin-film route, maximum uptakes of 13% (BOF-c) and 19.5% (BOF-d) at 40% CO2, and 17.8% (BOF-c) and 20.2% (BOF-d) at 100% were attained. The energy requirements of the two analyzed process routes appeared to depend chiefly on the CO2 uptake of the slag. For both process route, the minimum overall energy requirements were found for the tests with 40% CO2 flows (i.e., 1400 − 1600 MJ / t CO for the slurry-phase and 2 2220 0 -/ 255 MJ t CO for the thin-film route).

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“…It has been demonstrated that an OS ash-water suspension is able to bind up to 290 kg of CO 2 per ton of ash [4]. Moreover, upgrading industrial wastes into commercial products (e.g., precipitated calcium carbonate (PCC)) [4]- [7] via the carbonation route is one of the promising directions for CO 2 sequestration process.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, upgrading industrial wastes into commercial products (e.g., precipitated calcium carbonate (PCC)) [4]- [7] via the carbonation route is one of the promising directions for CO 2 sequestration process. In recent years, various carbonation routes have been studied in various reactor configurations to produce PCC-type materials using both industrial ash and its leaching waters that are saturated with calcium and accompanying ions [8]- [11].…”

Section: Introductionmentioning

confidence: 99%

Calcium Extraction From Estonian Industrial Wastes Based on Ammonium Solvents

Tamm¹,

Viires²,

Kuusik³

et al. 2017

WIT Transactions on Ecology and the Environment

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In Estonia electricity production is based mainly on local oil shale, the latter has been the country's most important mineral resources throughout the last century, up to today. In addition, the municipal solid waste incineration (MSWI) based heat and power production has developed rapidly. Industrial wastes from combustion processes are often rich in calcium and could be used as raw materials for CO2 sequestration and calcium carbonate production. Batch dissolution experiments were carried out to investigate Ca extraction from industrial wastes using ammonium salt solvents (NH4Cl, NH4NO3 and CH3COONH4). The dissolution equilibrium and dynamics of the main species was studied from the aspects of Ca extraction selectivity and environmental safety. Conductivity and pH change in the studied systems depends mainly on the solvent (its electrolyte ionic strength and ion mobility), addition of ashes basifies the systems. Test results indicated that Ca 2 + ion extraction was noticeably enhanced by ammonium salts as compared to water systems, using NH4NO3 solution gave the best results (extraction degree up to 95%). A simplified leaching mechanism for ash-solvent systems was presented, the latter can be used for future theoretical calculations. The study was focused on recovering of Ca from Estonian waste ashes, development of calcium carbonate as a commercial by-product will be the next step.

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The CO2 -binding by Ca-Mg-silicates in direct aqueous carbonation of oil shale ash and steel slag

Cited by 79 publications

References 19 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

Accelerated Carbonation of Steel Slags Using CO2 Diluted Sources: CO2 Uptakes and Energy Requirements

Calcium Extraction From Estonian Industrial Wastes Based on Ammonium Solvents

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