Carbon Mineralization: From Natural Analogues to Engineered Systems

Power, Ian M.; Harrison, Anna L.; Dipple, Gregory M.; Wilson, Siobhan A.; Kelemen, P. B.; Hitch, Michael; Southam, Gordon

doi:10.2138/rmg.2013.77.9

Cited by 215 publications

(188 citation statements)

References 326 publications

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“…Typically, for CO 2 mineralization, the pH needs to be increased to greater than 10.3 for the ionization of CO 2 to CO 3 2− for facile combination with metal ions (in an aqueous phase) [6]. In addition, other procedures are employed for the ionization of alkaline-earth metal ions to facilitate combination with CO 3 2− [3,[7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization

et al. 2016

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Blast furnace slag (BFS) was selected as the source of Ca for CO 2 mineralization purposes to store CO 2 as CaCO 3 . BFS was dissolved using aqua regia (AR) for leaching metal ions for CO 2 mineralization and rejecting metal ions that were not useful to obtain pure CaCO 3 (as confirmed by XRD analysis). The AR concentration, as well as the weight of BFS in an AR solution, was varied. Increasing the AR concentration resulted in increased metal ion leaching efficiencies. An optimum concentration of 20% AR was required for completely leaching Ca and Mg for a chemical reaction with CO 2 and for suppressing the leaching of impurities for the production of high-purity carbonate minerals. Increasing the liquid-to-solid ratio (L/S) resulted in the increased leaching of all metal ions. An optimum L/S of 0.3/0.03 (=10) was required for completely leaching alkaline-earth metal ions for CO 2 mineralization and for retaining other metal ions in the filtered residue. Moreover, the filtrate obtained using 20% AR and an L/S of 0.3/0.03 was utilized as Ca sources for forming carbonate minerals by CO 2 mineralization, affording CaCO 3 . The results obtained herein demonstrated the feasibility of the use of AR, as well as increasing pH, for the storage of CO 2 as high-purity CaCO 3 .

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Section: Introductionmentioning

confidence: 99%

Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization

et al. 2016

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“…7 One of these technologies is carbon capture and storage (CCS), which involves not only CO 2 separation and fixation 3 and underground storage, 8 but also mineral sequestration. [9][10][11] As necessary starting steps in reversible capture and storage technologies and carbon reutilization, adsorption and membrane separation of CO 2 from flue gases have been deeply researched. 12 Many possible materials have been considered for CO 2 adsorption, including zeolites, 13,14 activated carbon, 15,16 metal-organic frameworks, 17,18 and single-wall carbon nanotubes (SWCNTs).…”

Section: Introductionmentioning

confidence: 99%

Flue gas adsorption by single-wall carbon nanotubes: A Monte Carlo study

Romero-Hermida

Romero-Enrique

Morales‐Flórez

et al. 2016

The Journal of Chemical Physics

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Adsorption of flue gases by single-wall carbon nanotubes (SWCNT) has been studied by means of Monte Carlo simulations. The flue gas is modeled as a ternary mixture of N 2 , CO 2 , and O 2 , emulating realistic compositions of the emissions from power plants. The adsorbed flue gas is in equilibrium with a bulk gas characterized by temperature T, pressure p, and mixture composition. We have considered different SWCNTs with different chiralities and diameters in a range between 7 and 20 Å. Our results show that the CO 2 adsorption properties depend mainly on the bulk flue gas thermodynamic conditions and the SWCNT diameter. Narrow SWCNTs with diameter around 7 Å show high CO 2 adsorption capacity and selectivity, but they decrease abruptly as the SWCNT diameter is increased. For wide SWCNT, CO 2 adsorption capacity and selectivity, much smaller in value than for the narrow case, decrease mildly with the SWCNT diameter. In the intermediate range of SWCNT diameters, the CO 2 adsorption properties may show a peculiar behavior, which depend strongly on the bulk flue gas conditions. Thus, for high bulk CO 2 concentrations and low temperatures, the CO 2 adsorption capacity remains high in a wide range of SWCNT diameters, although the corresponding selectivity is moderate. We correlate these findings with the microscopic structure of the adsorbed gas inside the SWCNTs. Published by AIP Publishing. [http://dx

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“…Production of the sintered magnesia is a high-temperature process with high demands on energy consumption. The basic disadvantage of the contemporary shaft furnaces is their unsuitability to process magnesite concentrates with a grain size below 40 mm [2]. One of the biggest problems is to ensure uniformity of the sintering process through the furnace cross section.…”

Section: Introductionmentioning

confidence: 99%

Technical Optimization of Shaft Furnaces for the Sintered Magnesia Production

Koštial¹,

Nascak²

2014

Acta Metall Slovaca

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The contemporary shaft furnaces for the production of sintered magnesia have a very good performance. However, there are still significant possibilities of their improvement. Thermodynamic, hydrodynamic and rheological processes don't run optimally. The purpose of the research was to determine the reasons and realization of optimization measures. One of the significant requirements was to process materials with lower granularity (20 -40 mm). The improvement was focused on the charging system modification, burner system modification, coke utilization in the central part of the furnace, sinter heat utilization, increasing the insulation. Their verification was reached at the operational conditions. The result was conceptually new pilot shaft furnace, determined for the further research. The basic features of the new shaft furnace are distributed burners improving combustion of the secondary air flowing through the central part of the furnace. By this approach significant improvement of the temperature homogeneity through the furnace cross section is achieved.

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Carbon Mineralization: From Natural Analogues to Engineered Systems

Cited by 215 publications

References 326 publications

Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization

Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization

Flue gas adsorption by single-wall carbon nanotubes: A Monte Carlo study

Technical Optimization of Shaft Furnaces for the Sintered Magnesia Production

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