CO2 Capture by Alkaline Carbonation as an Alternative to a Circular Economy

Cruz-Navarro, Dalia Santa; Múgica-Álvarez, Violeta; Gutiérrez-Arzaluz, Mirella; Torres-Rodríguez, Miguel

doi:10.3390/app10030863

Cited by 5 publications

(4 citation statements)

References 17 publications

(27 reference statements)

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“…For Fe uptake, compared to calcium oxide, iron oxide has more potential to be liberated into the solution because of its high constituent. Thus, the condition favors the carbonation process, which is in good agreement with previous studies that have agreed that the most suitable pH for mineral carbonation is greater than 10 [71]. Figure 7 illustrates the DTG curves of raw and carbonated Fe-rich mine waste at initial pH (pH N) and at pH 8-12, which represent the peaks of weight loss that occurred in the temperature interval between 30-1000 • C. Most of the peaks appear at almost similar temperatures but have different weight loss percentages.…”

Section: Carbonation Process Optimization: Effect Of Different Parame...supporting

confidence: 92%

CO2 Sequestration through Mineral Carbonation: Effect of Different Parameters on Carbonation of Fe-Rich Mine Waste Materials

et al. 2022

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Mineral carbonation is an increasingly popular method for carbon capture and storage that resembles the natural weathering process of alkaline-earth oxides for carbon dioxide removal into stable carbonates. This study aims to evaluate the potential of reusing Fe-rich mine waste for carbon sequestration by assessing the influence of pH condition, particle size fraction and reaction temperature on the carbonation reaction. A carbonation experiment was performed in a stainless steel reactor at ambient pressure and at a low temperature. The results indicated that the alkaline pH of waste samples was suitable for undergoing the carbonation process. Mineralogical analysis confirmed the presence of essential minerals for carbonation, i.e., magnetite, wollastonite, anorthite and diopside. The chemical composition exhibited the presence of iron and calcium oxides (39.58–62.95%) in wastes, indicating high possibilities for carbon sequestration. Analysis of the carbon uptake capacity revealed that at alkaline pH (8–12), 81.7–87.6 g CO2/kg of waste were sequestered. Furthermore, a particle size of <38 µm resulted in 83.8 g CO2/kg being sequestered from Fe-rich waste, suggesting that smaller particle sizes highly favor the carbonation process. Moreover, 56.1 g CO2/kg of uptake capacity was achieved under a low reaction temperature of 80 °C. These findings have demonstrated that Fe-rich mine waste has a high potential to be utilized as feedstock for mineral carbonation. Therefore, Fe-rich mine waste can be regarded as a valuable resource for carbon sinking while producing a value-added carbonate product. This is in line with the sustainable development goals regarding combating global climate change through a sustainable low-carbon industry and economy that can accelerate the reduction of carbon dioxide emissions.

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Section: Carbonation Process Optimization: Effect Of Different Parame...supporting

confidence: 92%

CO2 Sequestration through Mineral Carbonation: Effect of Different Parameters on Carbonation of Fe-Rich Mine Waste Materials

et al. 2022

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“…The total reaction for the precipitation of CaCO 3 from carbide slag is shown in eq , and there are some other side reactions in the process, such as eq . When NaOH is introduced, the effect is shown in eqs and. − CaC O 3 + CO 2 + H 2 normalO → Ca false( HC O 3 ) 2 Ca false( HC O 3 ) 2 + NaOH → CaC O 3 + NaHC O 3 + H 2 normalO Ca false( HC O 3 ) 2 + 2 NaOH → CaC O 3 + Na 2 CO 3 + 2 H 2 normalO …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Accelerated Direct Mineralization of CO₂ by Carbide Slag under Ambient Temperature and Pressure Reaction Conditions

Lu,

Wang,

Zhang

et al. 2024

Energy Fuels

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With the proposal of double carbon targets in several countries, Carbon Capture and Storage (CCS) technology for large-scale CO 2 sequestration is receiving increasing attention. Alkaline solid waste carbide slag is a cheap and adequate raw material for CCS. Based on the control steps of the mineralization reaction for CO 2 fixation by carbide slag, a stepwise enhanced strategy for wet mineralization sealing under normal reaction conditions was devised to efficiently improve CO 2 mineralization and byproduct CaCO 3 content. Specifically, we introduced calcination to change the surface morphology of the carbide slag and then utilized agitation to improve the solid−liquid consistency and enhance the dissolution of the carbide slag and the leaching of Ca 2+ . Ultrasound and magnetic stirring cause the carbide slurry to vibrate, shock, and disperse violently so that the calciumcontaining phase releases more Ca 2+ into the reaction system and promotes CO 2 mineralization. However, it is possible that ultrasonic waves to some extent destroyed the CaCO 3 released from the carbide slag to form an encapsulating layer on the surface, allowing more Ca 2+ reactions and better performance of CO 2 capture and CO 2 mineralization efficiency under ultrasonic conditions. The addition of NaOH solution affected the generation of carbonate and the mineralization reaction, which resulted in a CO 2 mineralization efficiency of 86.7% (637 kg CO 2 /tonne of slag), a calcium mineralization product with a purity of 94.1%, and a particle size of about 100 μm under the conditions of 300 W, 25 °C, and 1 M concentration. This technology progressively enhances the process of fixing CO 2 by wetting the carbide slag with the byproduct of CaCO 3 .

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“…Besides these advantages, the investment in oxygen plant and flue gas recirculation system (CAPEX) and the energy consumption of these systems (OPEX) limits the application of oxy-fuel combustion to the conventional coal power plant. For post-combustion capture systems, Cruz-Navarro et al [3] assessed the CO 2 capture and conversion of low volumetric flow rates into carbonates using Sr and Ba alkaline solutions with a simple system to implement in small industries. The study of the reaction showed that a 20-min reaction time is required to maximize the carbonate production.…”

Section: Contributions To This Special Issuementioning

confidence: 99%

Special Issue on Carbon Capture and Utilization

Pires

Gonçalves

2023

Applied Sciences

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CO2 Capture by Alkaline Carbonation as an Alternative to a Circular Economy

Cited by 5 publications

References 17 publications

CO2 Sequestration through Mineral Carbonation: Effect of Different Parameters on Carbonation of Fe-Rich Mine Waste Materials

CO2 Sequestration through Mineral Carbonation: Effect of Different Parameters on Carbonation of Fe-Rich Mine Waste Materials

Accelerated Direct Mineralization of CO₂ by Carbide Slag under Ambient Temperature and Pressure Reaction Conditions

Special Issue on Carbon Capture and Utilization

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CO2 Capture by Alkaline Carbonation as an Alternative to a Circular Economy

Cited by 5 publications

References 17 publications

CO2 Sequestration through Mineral Carbonation: Effect of Different Parameters on Carbonation of Fe-Rich Mine Waste Materials

CO2 Sequestration through Mineral Carbonation: Effect of Different Parameters on Carbonation of Fe-Rich Mine Waste Materials

Accelerated Direct Mineralization of CO2 by Carbide Slag under Ambient Temperature and Pressure Reaction Conditions

Special Issue on Carbon Capture and Utilization

Contact Info

Product

Resources

About

Accelerated Direct Mineralization of CO₂ by Carbide Slag under Ambient Temperature and Pressure Reaction Conditions