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Showing 1 to 16 of 16 for “"Mineral Carbonation"”.
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CO2 Sequestration through Mineral Carbonation
… CO2 storage is permanent fixation by means of mineral trapping. This thesis explores the use of unconventional reservoirs such as shales and siltstones as a target for mineral trapping of CO2. Although some studies of CO2 storage in shales and low-permeability (tight) reservoirs exist, most …
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Assessment of the potential carbon footprint of engineered processes for the mineral carbonation of PGM tailings
Mineral carbonation is a carbon sequestration technology that entails the reaction of CO2 with oxides or silicates of magnesium, calcium or iron to produce stable carbonate compounds. Magnesium-rich tailings from the platinum industry in South Africa have been identified as a potentially viable and …
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An investigation into the dissolution of pyroxene : a precursor to mineral carbonation of PGM tailings in South Africa
Carbon sequestration through mineral carbonation is becoming an increasingly attractive alternative for mitigating excess CO₂ in the atmosphere. Mineral carbonation is a natural process whereby CO₂ is fixed to CaFeMg-silicates to form Ca-, Fe-, and Mg-carbonates. This process is thermodynamically …
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Mineralogical characterization of South African mine tailings with aim of evaluating their potential for the purposes of mineral carbonation
… instantaneously. This CCS technology is known as Mineral Carbonation. The fundamental procedure is a reaction between (magnesium - calcium - iron) silicates and CO₂ to form carbonates. The products of from the reaction require no monitoring and the fear of leakage of CO₂ is eliminated. Moreover, …
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To develop a new mineral carbonation process that have a high efficiency in CO2 absorption into industry slag using low energy mechanical milling
… This research is to aim a development of new mineral carbonation process that has a high efficiency in the capture and storage of CO2 with low energy consumption. In the first stage of this study, the behavior of CO2 absorption on electric arc furnace and ladle furnace slag was studied by low …
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Carbon Sequestration Through the Production of Precipitated Calcium Carbonate From Waste Concrete
… limestone (CaCO3) from calcium silicate minerals and CO2 via mineral carbonation. Certain grades of CaCO3, including Precipitated Calcium Carbonate (PCC), are sold as a filler and pigment to several industries. Therefore, if marketable as PCC, the production of CaCO3 via mineral …
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Molecular Dynamics Simulation of Forsterite and Magnesite Mechanical Properties: Effect of Carbonation on Comminution Energy
Mineral carbonation contributes to CO2 reduction, and it may also reduce the cost of mineral processing by improving the mechanical properties of rock/ore. Here, we study and compare the mechanical properties of two minerals, forsterite (Mg2SiO4) and magnesite (MgCO3) using molecular dynamics (MD) …
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CO2 sequestration using brine impacted fly fish
… African FA and brine could sequester CO2 through mineral carbonation. A statistical approach was undertaken to optimize the % CaCO3 formed from FA/brine/CO2 interaction with input parameters of temperature, pressure, particle size and solid/liquid ratio (S/L) being varied. The ranges adopted for …
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Silicate Mineral Dissolution and Associated Carbonate Precipitation at Conditions Relevant to Geologic Carbon Sequestration
… from fossil fuel combustion on climate change. Mineral trapping, one of the trapping mechanisms of GCS, is of great importance because it has a potentially high sequestration capacity and provides very long-term sequestration. Forsterite: Mg2SiO4), a magnesium-rich silicate mineral, was studied …
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Modelling and CFD simulation of a fluidized bed process for the capture of C02 from fossil fuel combustion sources
… CO2 capture from combustion exhaust gases by mineral carbonation using a fluidised bed is studied in this project. CFD modelling has been used to study the efficiency of CO2 capture in a fluidized bed reactor containing a solid sorbent Calcium Oxide (CaO). This present work seeks to maximize …
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Accelerated carbonation of wastes and minerals
Accelerated carbonation technology (ACT) could be used for the stabilisation of hazardous wastes, remediation of contaminated soils and re-use/recycling of various waste streams. ACT has also potential for storing anthropogenic CO2 emissions into mineral silicates and alkaline waste residues via …
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High-performance carbonatable cementitious systems: novel materials and processing methods
… carbonatable cementitious materials (CCMs) using mineral carbonation has been considered one of the sustainable approaches for addressing the anthropogenic CO2 emissions because of their potential to absorb environmental carbon dioxide (CO2) to form stable, durable, and environmentally friendly …
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Mineral sequestration of CO2 by reaction with alkaline residues
… thesis, a novel approach to achieve a long-term mineral sequestration of CO2 was studied, using alkaline residue materials. This study examined for the first time a process that allows for rapid removal of CO2 from flue gas through reaction with lignite fly ashes in aqueous solution. In this …